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Old 01-10-2013, 03:05 PM
BMW 3-SERIES BMW 3-SERIES is offline
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Location: Arizona
Join Date: Jun 2007
Posts: 441
Mein Auto: 2000 540i Sport (E39)
Originally Posted by shermes66604 View Post
Thank you for responding to my post! I will have to check out the vaccum leak and get that fixed. I hope I can find and repair the leak quickly. If it is not a vaccum leak how do you change & where is the 02 sensor?

As far as the battery goes, we have already replaced the battery and still have the same problem. I will get a multi-meter and test it out. I have asked a few people and they seem to think by disconnecting the alarm system it would stop the short but they also said it may cause the car to not start.

I am more use to fixing older "muscle car" issues so vehicles that are mostly computerized I am clueless on.

The shop that gave me the $8k quote was a BMW dealership. They said they would have to completely remove the engine to get to the timing chain and replace it. I had looked up a DIY on it and it was done without removing it. My husband was the one that got the quote & I had called to confirm the quote & to find out exactly what they were going to do. It sounded like we were getting screwed right from the get go so I cancelled the appointment my husband had made.
That's non-sense. It would be even cheaper to get a replacement used motor with less miles, and buy all the timing parts. Those motors run anywhere from $ 2,000-2,500 with decent mileage. The O2 sensors you would want to replace are the Pre-Cat sensors which are Bosch 13559 run about 60ish at AutoZone. Definitely help with fuel economy anyway. Its recommended replacing those at 100,000 miles. It would be nice to get that car scanned with DIS/GT1 or better AutoLogic computer which will point out whats wrong. Usually BMW specific shops will have those. It could also be bad coils. You could check those by running the motor and pulled the coils out and listening for spark. That's not too hard to do. Just remove the 10mm nuts holding the coils down. Take a video, I'd like to hear/see whats going on
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