2004 bmw 325 ci my Battery almost dies after not driving for 2 days. Just had a new Stereo put in. Does that cause a drain ? Also what Battery should I buy. Please do not say from Bmw........ thanks.

Tani,

GOOGLE "mass air flow sensor 2004 bmw 325i" .....there you will find your answer.

check the fan belts and power steering belt, also the crankshaft pully could be free spinning

Yes, it sounds about right for your vehicle. 13.92 volts with full load is enough to keep the battery charged up.

There is no direct wire connection, you are going to need an interface device. I would suggest using an AXXESS AWSC. Here is the link to the instructions for it... here

If it's not turning the car switch over the key itself is wore out. Get a new key made and they will change out the transponder for you, costs about $10.00 also be sure you don't have a lot of keys hanging on your key chain because this will cause the lock to fail early or wear out the key.

on the bottom of the engine, at the big end, just before the gearbox.

Humm ...Didn't die before the accident? now dies? BMW has good mechanics,but could not find any problem???. I gota think that it is related to the rear ending,but how? I would look for loose connections, Battery Ground that might have been removed before welding.Battery terminals, Any primary connections that may not be making 100% contact . It's worth a try.Good Luck

you need to disconnect one side of the battery, put one lead from an ampmeter on the battery post you have disconnected and the other ampmeter lead on the cable you took off the battery. with nothing turned on on the car , all doors closed the reading on the ampmeter should be no higher than 0.17 amp, if it reads a lot hgher go to the fusebox and remove one by one all the permanent supply fuses looking at the reading every time until you find the circuit that is causing the high reading, this will be the drain. alot of the time it can be central locking system playing up, boot light, glove box light not switching off, stereo wired wrong. hope this helps.

If you have the diamond shape key, the battery is not replacable. If you have the square shaped key, the battery is replacable, but that is obvious because of the screws on the back of the remote.if you have the diamond shape key, it is recharged when its inserted into the ignition. If the key hasn't failed, taking a long trip 60 min. or longer should recharge the battery. If there is no change in the operation of the key after your long trip, most likely the key has failed and needs replacement.

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