The most common causes for slow acceleration in BMW 3 Series are clogged air filter, dirty mass air flow sensor (MAF), clogged fuel filter, fuel pump malfunction, faulty oxygen sensor, worn spark plugs and clogged catalytic converter. Less common causes are bad ignition coils, dirty fuel injectors, clogged engine oil filter, transmission Mar 19, 2014. #1. Hi Guys, just to share and warned to our fellow bros here that our E90 Alternator can fail without any warning or symptoms what-so-ever, the battery warning sign will pop out in RED on OBD, it will render our E90 to be immobilised i.e., loss of power steering and all electrical power eventually So please STOP and activate iTrader: ( 0) Garage List. 2011 BMW 328xi [0.00] E90 Changing a battery = FRM Failure! Well lesson learned! Decided after getting inspection, new tires, and 130K mile fluid flush that I should proactively replace the battery as it is more than 4+ years, and hey Walmart will install for free! While waiting in the store "browsing" because you can Poor Mileage. The fuel economy of a car will get severely impacted by a choking throttle body. The ideal way of measuring the mileage is the full tank-to-full tank method. You first put a full tank of fuel, make a note of the odometer readings or set one of the trip meters to zero and then travel a few hundred kilomet Sockets are "Live" on one side as both are UN-switched battery power (KL30) as indicated by the small "30" over each fuse symbol on the SSP. If symptoms persist, I would disconnect X11010 at the top-left of JB (Junction Box) Fuse Panel, and carefully inspect pin & Socket related to Pin #6, Green Wire, as that is KL15 Activation wire from CAS There's no real test for the IBS. If you start having the starting problem again, fully charge the battery using a digital charger. Disconnect the 2 leads going to the IBS (blue connector at the rear distribution panel) and the small twin lead going to the ECM. This will cause the ECM to default to 14.3V charging. 217 posts · Joined 2008. #1 · Jan 15, 2015. Engine ground cable (strap, right side low in engine compartment) I didn’t know we even had one of these – just never came across it (from under the car or on any diagrams) and because there’s a ground from the battery to the body – never thought about it. Well it is important!!! gbalthrop. 4952 posts · Joined 2017. #2 · Mar 8, 2020. rralston3 said: So starting probably 2 months ago my 2011 BMW E90 328i sedan started having longer cranks. This happens more frequently now pretty much every time I start the car. I checked the battery voltage and it's at ~25 VDC. The car has a disappointing 94,000 miles for all the BMW E90 328i Sedan / Repair Manuals and Technical Data / 61 General vehicle electrical system / 61 20 Battery / Closed-circuit current measurement Sporadically or continuously, an increased closed-circuit current can occur in the parked vehicle. oQJx.

bmw e90 bad battery symptoms