This coincides with the battery amp of 80amp, so Jul 13, 2012 · E90 - Parasitic Drain | BimmerFest BMW Forum. This sound (both clicking and buzzing) never stops. I installed a new battery today, got it programmed and to my surprise I got a message on the dash saying “battery drained while stopped” which is hinting at a parasitic drain. I am hoping members can post what they found to be the source of this so that others can try the common Feb 12, 2024 · A forum community dedicated to BMW E46, E90, and F30 owners and enthusiasts. Jul 18, 2017 · History: Car Battery would drain even while parked. The most common cause of BMW battery drain while parked is what’s known as a parasitic drain (or parasitic load). 18 amp drain on the battery after 5 min (I think when car is in sleep mode, with doors locked). checked parasitic drain with a test light and i get no light (trunk light removed). 05 amps. Apr 9, 2023 · BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > 2012-2019 BMW 3 and 4-Series Forums > General F30 Sedan / F32 Coupe / F36 Gran Coupe Forum > Parasitic Drain Saga Google Search Search Forums Sep 9, 2023 · There are a few different culprits that can cause your BMW’s battery to slowly discharge over time while the car is parked in your garage or driveway: 1. Mar 7, 2014 · Battery drain/Parasitic draw. Car battery drain with after market stereo. The time now is 04:59 AM. 8 Returned to BMW. IF camping look into a "solar" powered charger, usually available at RV dealers. For some reason, my '16 X5 xDrive35i gas 6cyl has been killing its own battery over and over for the past several days. Feb 24, 2023 · iTrader: ( 0) Parasitic battery drain — interpreting BimmerLink codes, NOT the cluster. OP • 2 mo. Turn off unnecessary features like the display or lights when not in use to conserve battery power. (They can draW 30 - 50 amps. Jan 3, 2024 · the load on the battery bleeds off the surface charge til the battery is at nominal voltage. Feb 4, 2022 · Doing This Will Fix Your Car's Battery Drain For Free !!Add Me On Instagram @BMWDoctorOfficialGo to My Spotify Playlist which has all intro songs used on my Dec 12, 2022 · In the past 3 weeks, I have done the following which still confuses me because I'm just shooting in the dark which led me to do the parasitic drain testing. The max draw while the car is asleep is ~30-50mA or . 07mA. ^^^ +1. Feb 8, 2022 · How I fixed the battery drain caused by my faulty gauge cluster on my bmw f30 328d. A little history here: last year around the same time Jan 4, 2022 · If you have no parasitic drain, then you have eliminated that as a problem. I have been doing an LED change on my instrument cluster, radio etc and seem to have caused an issue probably from forgetting to disconnect the battery negative on the last part of the modification! Jan 24, 2011 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. Other causes of parasitic drains can include things like an aftermarket stereo system or even something as simple as a door that isn’t fully closed. One is. January 9, 2020. After a good 13 months, 4 battery changes, and 1 alternator change - I am stuck with a $500. If you find that your alternator is charging the battery, then it's possible you have a bad battery. Several modules store faults for K-can circuit problems. I have seen a few people post about parasitic draws in the E39's. Allow the vehicle to sit with the key off for at least 40 minutes to allow modules to time out/power down. When the car is sitting with the doors and hood closed (trunk open and lamp removed), I see a 4A draw. 0. I will suggest the stereo to my advisor as they and BMW (Barely Moving Worry) and I know it seem lost. EDIT: Added how to best buy and properly replace the battery based on tribal knowledge. In the summer It never drained to the point of a no start condition. 5A trickle charger (s) will never fully charge the battery and go into 'float' state where it just monitors the charge. then load test it, as well as test your charging system. i suspect it could a module or a device that is causing drain. Using amperage probe, measured significant current draw on many curcuits. Jun 24, 2014 · Got a 2003 330ci with a parasitic battery drain. If you have a tracking device, it's internal battery has most likely died and it is now draining your car battery. Now, just two days ago I wash and wax my car left it in the garage for two days and this morning the battery didnt have Your battery could actually be draining while parked or it may not have charged fully and is depleted and your car interprets that as it's draining, or could be worn out and has trouble holding a charge, or a combination of factors. Remember, electrical problems can be complex, and attempting diy fixes without proper knowledge and expertise can lead to further damage to the vehicle. However it is continually draining the battery. Appreciate 0. This make has extra. Try searching on here. Therefore, you need to find the specific cause to fix the problem. Anyone else having an issue with battery drain because of instrument cluster. EDIT: RDL added wiring diagrams and a test sequence for the starter and charging circuits. This was killing the battery in a couple of days, so we pulled fuse 62 and that dropped it to 0. no, but thanks for asking. 00 battery and a replacement fee $1095. For some odd reason the battery drains and will not turn the car over after sitting for 8-12 hours, max. iTrader: ( 2) Battery drain issue 2007 E90/335i Sedan. I can hear the water pump start (verified in coolant tank) even with the car locked and alarmed. 130266. Mar 20, 2019 · Sat Mar 23, 2019 6:58 pm. Greetings, Less than 6-7 months ago I change my battery at a BMW dealership. This meansr the battery can give 1 hour of 90 Amp continuously. Disconnect the battery ground lead from the chassis placing the meter in-line with ALL circuits. Feb 21, 2018 · It looks though that I have come up against the legendary E60 overnight battery drain. New battery dies within a couple of days. ^ Do a "carbon pile" test on the battery. Come join the discussion about M performance, turbo kits, engine swaps, builds, modifications, classifieds, troubleshooting, maintenance, and more! Oct 18, 2014 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. Data feed in CAS module, shows terminal 15-1, 2, & 3 all live with key off, and both can networks wake signal live. Problem solved!:thumbup: After doing my research in several forums, I believe that there might be other parts that may cause this issue for other Oct 15, 2013 · High battery drain from instrument cluster. It was sitting for about a week or 2 and when I went to start it, it was dead and wouldn’t start from a jump so tried to trickle charge it over night and then wouldn’t start and bogged out as if flooded thought battery was fine but next Drives: Bmw e92 328i. There are numerous posts on this. Aug 28, 2016 · Hi Fanatics, I am trying to diagnose some heavy parasitic draw on an E90 335i N54 2007 Auto (135 000km's). Car is an E46 M3 convertible. May 30, 2019. Once the car is in sleep mode it drains at about 0. They performed the battery reset in accordance with BMW instructions. I left my multimeter in series with the battery. This sound varies from time to time May 7, 2019 · This is a parasitic draw, and it can cause the same result as leaving the headlights on: a dead battery in the morning. I locked myself in the car, trying to figure out if the car falls into sleep and I heard a humming sound (motor turning sound) behind the dashboard. Troubleshot and found 40amp draw as the car goes to sleep. Find out why this may be a waste of money. Dropping battery voltage can be weak battery and or alt, too many short trips, bad cable connections or parasitic draw exceeding normal limit. 00 for the TCU module. Jul 18, 2010 · In my case, the fault for High Battery Drain is being caused by "defective passenger front door comfort access tag handle carrier". Make sure you push it ALL the way in. First things first I was told the battery was new, the sticker on the battery even confirmed this but since it was a cheap battery I went ahead and replaced it with a new AGM one from Mar 3, 2017 · But for searching out parasitic drains you might need to be looking for milli-amps and switching the ammeter scale could interrupt the circuit and re-start the sleep timer. Power draw should be under 50 milliamps. I have a 4 amp parasitic drain on my 1 series battery. Join Date: Mar 2021. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Feb 19, 2013 · Unhook the negative battery terminal and place the year light between the negative cable and the negative terminal. LSB. Your voltages look to be at the upper end of the normal range, i actually dont think it is the battery yet, i would get my hands on a multi-meter and test the amp drain on the battery. Aug 24, 2017. Parasitic Battery Drain - Using ISTA-D to Diagnose Apr 25, 2020 · 2006 m3 smg Battery Drain (SOLVED) Wanted to make my first post about the battery drain I have been facing ever since purchasing my 06 m3 smg vert last October. By Staff Writer. Jun 13, 2017 · E39 M5 battery drain. I daily it. and have the battery checked by a place that knows what theyre F30 / F31Model Year: 2012 - 2018. E90 328i (VIN FZ73181 ) was found with dead battery unexpectedly, battery was 2 volts 2. Hoping somebody might be able to shed some light on this problem. Sep 26, 2016 · A forum community dedicated to BMW E46, E90, and F30 owners and enthusiasts. Oct 13, 2015 · 1. Help w/ parasitic battery drain. Quote. It clicks twice. Jun 30, 2019 · Completely disconnect the battery and perform the same test. Hey Guys - I'm new to this forum. ryt8. Using the fuse removal method I can nock it down to 340mA by removing fusers 46, 49 Technical Forums Mechanical Maintenance and TSBs: Break-in / Oil & Fluids / Servicing / TSBs and Service Bulletin > Parasitic Drain On Battery Jun 30, 2022 · Disconnect the negative battery cable. We had a 0. Measure the voltage drop between the B+ jump point and the cigarette lighter and multiply by 300. For more information on affiliate links, please click here. Jun 24, 2020 · As a starter fails , it can take up to double the current: something a nice new battery can handle but an older battery cannot. Dear all, After I replaced the voltage regulator on my 2009 BMW 328i Xdrive Coupe, the battery drain continued. Pulling fuse 4 drops the drain to around 120mA or so which is still far too much and then pulling fuse 27 also drops it another Apr 30, 2021 · Ensure the stereo’s automatic power-off feature is functioning correctly. 1. Many of them resolve to the cluster being Aug 3, 2009 · bmw 328i. 0 MA; when i try to remove ea. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm May 18, 2015 · bluebee. Oct 5, 2021 · 1> get somone to scan the BMW codes (not just OBD2) properly and see what codes it throws. iTrader: ( 0) Battery Drain; Parasitic Draw, LARGE. Plugged in foxwell code scanner and May 30, 2019 · Staff member. I’ve owned this car for the past 6 years and have just recently (last couple weeks) been getting a warning message to advise the Battery Is being discharged while stationary. The best solution is to remove this infernal device completely, but if you are at the mercy of your insurance company, the tracking company should replace the unit for you (or you could switch insurers). Last Tuesday my battery was dead. Remove the fuse box cover, Using your meter take a reading on fuse #28. This is in a perfect world with battery @ 100% charge to begin with, normal state of charge in real life of a battery installed in car might be around 70%-7% especially BMW with smart charging system. If so you're probably OK. 2> get same to go into the body section (on ista) then battery and look up and see what the battery is doing, 3> as above but the standby current draw and times. 050A. So I have a slow parastitic drain that I looked into today. 0 MA; when i disconnect the power cable to the main fuse box (engine compartment) it drops down to 4. ago. Battery drain due to faulty final stage resistor. You can get a rough idea of starter current if your DMM has a peak (min/max) mode. On this circuit is Water valve, climate control, immobilizer, chime, computer and instrument cluster. In short, you measure voltages at different places to confirm. The most amp draw is 0. Mar 7, 2012 · Please help!!! Parasitic Battery Drain! Jump to Latest Follow A forum community dedicated to BMW E46, E90, and F30 owners and enthusiasts. Next morning, electrically dead. If not you've got a parasitic drain when the car is not running. confirmed to be at 8amps. The more of a voltage drop, the weaker the battery. May 27, 2016 · May 27, 2016. Aug 28, 2014 · 16 posts · Joined 2014. May 14, 2016 · Measure parasitic draw. 7amp drain. As above, FSR Aug 24, 2017 · Colour Combo. Disconnect the negative. Consider installing a battery-saver device to prevent the battery from draining when the car is not in use. Report back number. 6. Dec 23, 2022 · There are a few things that can cause a parasitic battery drain, but the most common is a faulty alternator. #3 · Jan 16, 2017 (Edited) 39/1000 of 1 amp (39mA) draws are not going to kill your battery - the two most common points of drain that kill batteries in this e46 are the FSR and/or the electric cooling fan. (b) connect a multimeter inline between the battery and the car. I diagnosed my high battery drain - ~170-200mA to be from fuse 31. Also hear clicking sound every 13 or 20 seconds. Repair Summary. After some testing and opinions, I replaced my alternator and battery. #1 · Aug 27, 2014. The car powers down everything and will achieve that power level. That being said, if the car spikes above above 100mA, you should see a check control message saying increased battery drain/discharge. #3. Nov 14, 2009 · New battery Monday, new sunroof cousel and two days later back in due to same battery drain issue. Jan 7, 2018 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. on it. So I will often get a high battery drain message when my x5 sits overnight. What I'm thinking is maybe theres a short in the actuator and it's trying to lock the door and draining the battery, but I don't know. 2. Locked the boot catch and passenger door catch, removed boot lights and waited 16 minutes for the car to sleep. Nov 12, 2023 · I have a 2013 BMW F30 320i sportline with an N20 engine. #4. What started out as a simple request to change an alternator on a 2003 325I has turned into one of the problems I hate the most. The battery was 9 years old so I put in a new one (90 ah) and everything worked fine. Make sure you have the meter set to its highest setting (if applicable) prior to disconnecting the battery lead from the chassis. Monitor the current draw. It's been and on going issue but I have yet to figure the issue out. Jan 16, 2017 · BMW-North. #9 · May 19, 2015 (Edited) The easy answer to the question of sleep mode is to open the trunk and shut all doors and let the car sit for 16 minutes with an ammeter on the battery until the trunk light goes out and the ammeter reading drops drastically. The dealership performed a test, determined the cause, replaced the part and I never got that fault message again. We are going to discuss different methods of finding battery draws and the importance of using the right tools. HELP!!!! E90 - Parasitic Drain. You can do it yourself, as they can be picked up at any auto parts store for $20-$50++ most times. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Feb 2, 2023 · After work car was electrically dead. I recently installed a atoto f7 unit into my car (Astra H 06). Location: Chattanooga TN. Instead of replacing the cluster I pulled fuse 50 and viola Nov 9, 2020 · The next morning see if it's at least 12v. Replaced the battery with appropriate replacement, did not code it since I Aug 25, 2021 · A BMW 3 Series (F30) uses an 90 Ah AGM battery. Feb 4, 2024 · If your vehicle is drawing power from the battery and all of the lights and other electrical components are off, you might have a parasitic battery drain (or draw). Location: Fairfax Co, VA. If not repeat the process, but this time disconnect the battery negative terminal. Charged it, performed parasitic drain test using ammeter in line with neg cable battery cable to battery. 4. My E70 is literally the joke of work. Jan 6, 2011 · EDIT: Started with testing the battery & then added a section on testing the alternator. Parasitic Drain from Faulty Components. Remove the negative side battery cable from the negative battery terminal. That will at least tell you whether you have a parasitic drain or if the issue is the battery itself. At Bimmerforums, you will find technical how-to information maintenance specifics audio advice wheel and tire combinations and model specific details not found anywhere else. Jump started it and got it home. The start/stop switch turnes off now and the battery parasitic drain stopped so it definitely was the cluster just like what happened with yours. 2mA, it will be good for 15,476 hours, or getting on for two years. Fortunately, there is something you can do yourself before taking your vehicle to an auto mechanic shop. I have a 2000 E39 M5 that has a parasitic drain on the electrical system. with a meter i get 23. When waking up to a dead battery and you cannot start your BMW anymore, many people rush to buy a new battery. 98 328i. 1 VDC 5 hrs after disconnecting charger is worrisome, that it only dropped to 12. The key was the fault code I listed up above that refers to the Kombi so BMW diagnostics identified the right module even though the message is not clear and if it shows up you will need a new cluster It's a 2011 x5 35d. Open the glove box, tape the light button so the glove box light is off. that you had only 12. dinnydubs. Nov 19, 2020 · 2015 x5 xdrive35i with n55 engine - No overheating issues - no codes related For the engine - just a warning about battery discharge and a dead battery the next day. After ignition is turned off, doors closed, I hear buzzing sound from inside the engine compartment (i think it is from DISA). Come join the discussion about M performance, turbo kits, engine swaps, builds, modifications, classifieds, troubleshooting, maintenance, and more! Jun 12, 2021 · That aside, IMO the best way to troubleshoot a draining battery is to: (a) disconnect the battery, fully charge it, and see if it holds a charge disconnected. Come join the Feb 3, 2020 · 3. Affiliate link disclosure – The BMW Repair Guide uses affiliate links in their site. 2010 Space Gray 35D. - disconnect the -ve battery terminal. Apr 15, 2010 · So after the BMW battery is installed they tested it - they found that the TCU module was draining and needs to be replaced. Aug 21, 2021 · You need to see if total draw exceeds that. I have wired the red wire into an ignition switch ( in this case the cigarette port) but the radio is still turning on constantly. 3. I've searched for parasitic battery drain threads and found lots of theories (FSU, NAV, TSU, Aux Fan, Radio, gear shift light/sleep mode, etc. By keeping the battery terminals clean and the electrolyte level up to the mark, you can add an extra year to the life of your vehicle’s battery. if yes then. 030-. Now you need to figure out if your alternator is charging the battery. With the car locked and the various modules gone to sleep after > 2012-2019 BMW 3 and 4-Series Forums > General F30 Sedan / F32 Coupe / F36 Gran Coupe Forum > "Battery discharged while stopped" I'm wondering if anyone can tell me the typical parasitic draw on a battery when the car is not running and is 'asleep'. Started seemingly out of nowhere, and I can't seem to identify why this vehicle has decided to do this. #6. Open the passenger door, manually move the latch on the passenger door to lock it. Fault codes E519, 9CBF, A409, A0B2, E714, 51AD show up on Carly. Changing battery/removing IBS did nothing. The more strategies you have to attack a parasitic draw, the better. New battery didn't fix it and eventually the Dealers (Calterdon, Inverness at the time) took it in to investigate the parasitic drain, having tried to blame 'driver profile' . Luckily, you can usually find the cause of a parasitic draw yourself. Oct 7, 2023 · So let’s find out what options you have left; #1- Keep battery terminals clean. 04. Jan 9, 2020 · BMW F30 Battery Replacement – 2012-2019 3 Series – All Models. Short of your having something installed on the bike wired directly to the battery there is nothing else on the bike that should be causing the drain. Diagnosing battery draws can be time consuming, especially when the draw is intermittent. Having five or six sources is not normal. there is an alternative: - let the car go to sleep. Horrid for realibility. #1. battery at 12. I don't have comfort access and It'll do it whether I lock it of not. Tested the alternator and found I had bad Diodes. Repair Difficulty and Cost. BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > BMW Coding > Parasitic Battery drain, Start Button Sep 26, 2021 · Shows up as Right backup lamp malfunction, Left front parking lamp malfunction, right front parking lamp malfunction, and PDC malfunction on my 2004 530i E60. With it unplugged, the drain drops to ~30mA. resetting and to catch capacitive drains. If you don’t want your BMW battery to drain overnight, you should keep its terminals clean and corrosion-free. iTrader: ( 0) E92 328i (2007) Draining battery, NEED HELP!!! So like the title says, I've got a 2007 e92 328i. Nov 17, 2020 · Drives: 2007 328xi E91. Watch the video to see how Aug 2, 2023 · If you suspect a battery drain or electrical short in your bmw f30, it is crucial to have it inspected and repaired by a professional technician who can identify and resolve the underlying causes. E30 Zone Newbie. Thats basically when they hook up a small ($30) device up to the battery, while it measures the continual voltage as it drains significant amounts of amps. By disconnecting each, one at a time, I found it is the cluster. If a properly-charged, new battery is being drained to ~ 10V overnight, the MOST likely suspect is the Alternator (failed diodes NOT acting as "electrical checkvalves"). Join Date: May 2017. Nov 3, 2020 · #BMW #DeadBatteryMy BMW X5 keeps giving me "High Battery Drain" error messages. They had it for iirc a fortnight, and eventually iTrader: ( 0) 2016 BMW F15 X5 Electrical Drain / Battery Discharge. Jumped it but after sitting for a few hours it was dead again. #5. Check the battery off the bike, charge and load test. Lights all appear to be working fine but battery dies by the morning. I had similar a few years back. 2 vdc isnt a good sign, fully charge it before testing. fuse/relay to Nov 13, 2021 · when disconnecting the B- connection and bridging it with your meter, the car will come out of sleep mode for the 16 min period, and you should be seeing a current draw on your meter. At first only a bit over long hours parked but eventually a faster drain (within about 15 minutes). Parasitic Battery Drain e53. I have been hunting a battery drain problem for a couple months, and the more data I gather the more confused I am. 5. Things seemed fine with the new battery as my cranks were much smoother, but Jul 17, 2014 · E39 parasitic draw. 04 overnight is as well. Start by connecting a digital multimeter to the negative battery terminal of your vehicle. 3619 posts · Joined 2008. This message appears whenever I switch off the car “Battery Discharged Start Engine”. If it still loses its charge overnight the battery is bad. I tried swapping from harness b to harness a which connects . This will display as 0. If you pull a fuse and the light goes out, then that's this circuit that has the short/current draw. Posts: 7. I installed and registered a new battery in the car about 2 months ago. 2007 Space Gray 4. Turns out battery was original to the car (2006-11), lasted 16 years no issues, but sadly no longer charging over 12V. It's frustrating. Touch the other lead to the negative battery post, completing the circuit within the multimeter, which will display the amp draw. i would do a parasitic draw test, the voltage drop across the fuses type, after the car has gone fully to sleep. Next go to the fuse box and start pulling the fuses. F30 335i water pump runs continuously, drains battery. On my recently acquired 335d which has a new factory battery, my BatteryTender 1. When the alternator isn’t working properly, it doesn’t charge the battery correctly, and eventually, the battery will die completely. Typical E30 battery has a capacity of 65Ah or 65000mAh, so at a drain of 4. Connect a fused jumper wire between the negative. BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Navigation, iDrive, Audio, Video, Bluetooth, Phone, Cameras, Electronics > 2014 328i Battery Drain after Ambient Temp Sensor Replacement 2014 328i Battery Drain after Ambient Temp Sensor Replacement Mar 26, 2019 · Hi there, I have been having issues with my e90 330xi. Connect the black wire to the com input on the multimeter and the red wire to the 10A or 20A input on the multimeter. 003. Have been on BimmerForums since 2007 for my 1998 M3 e36 vert and my wife's 2005 X5 e53 SAV -- but learned this forum digs deeper into the X5. Before someone tells me to search, yes, I have read quite a few "battery drain" threads on here. Touch a lead to the negative battery cable terminal. The battery discharge warning can be caused by a bad battery, parasitic drain, corroded/loose battery terminal, faulty battery charging system, cold weather, etc. Recently the car has had various warnings come up on the iDrive ranging from transmission to DSC to lighting as well as a frightening low coolant warning. If the light is on then you have a current draw. I replaced my dead battery with a new 92AH AGM battery, I used BimmerLink app to register the new battery. iTrader: ( 0) yep, the bat has a drain on it just like any other "newer" car. Jan 9, 2021 · BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > 2012-2019 BMW 3 and 4-Series Forums > General F30 Sedan / F32 Coupe / F36 Gran Coupe Forum > Increased battery drainage whilst stationery Oct 13, 2015 · All times are GMT -5. Dec 13, 2014 · BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > 2012-2019 BMW 3 and 4-Series Forums > General F30 Sedan / F32 Coupe / F36 Gran Coupe Forum > Increased battery discharge: Fixed!!! May 28, 2023 · I dug out my multi-meter, tested the voltage, all good, alternator also charging as it should, so then decided to put my meter in line with the battery and negative terminals to test for a parasitic drain. Nov 24, 2016 · 1 series E87 parasitic battery drain due to CAS unit? Hi new to this forum so bear with me. I have an 06 RT with the original battery and I have never used a trickle charger and never will. Shuts off when hood or door opened. If the car sits, for more than a couple day, put a trickle or maintenance charger. I have basically narrowed the drain down to 2 circuits. battery cable and the negative battery post to prevent modules from. Jan 11, 2023 · Story: 1. HELP! My 2006 325i's battery is draining. EDIT: Ågent99 added a test for parasitic drain causing a dead battery overnight. Nov 6, 2023 · 2012 335i battery drain, BMW 3-Series and 4-Series Forum (F30 / F32) so I at least appear to have one of the many potential parasitic drain issues, yet to be I have a 2013 BMW 328i, over the last little while my car has had some battery issues so I thought it was time to get a new battery. So I have a 2013 335i here with an enormous parasitic draw. 25378 posts · Joined 2008. 4> share the above with the group. Before you go to a mechanic and pay money to have him disconnect this or disconnect that or hook your car up to a Aug 18, 2021 · Connect the negative lead to the negative battery post. The water pump runs at full speed drawing in excess of 30 amps, which obviously knocks the battery flat rather quickly. Also I was told that it might even be something else draining the Jul 10, 2013 · Jul 11, 2013. My 03 M5 I just bought has it and drains the battery overnight just enough to where it won't start the following day without a trickle charger or jump box. ) Location: Williamsburg. For now, follow my suggestion above in #14 and 16. Sure enough, when the car goes into sleep mode, my multi-meter is showing a 1. vc ei be dr el tp uj bp ni vv