Frequently Asked Questions.

[Frye]

It would be nice to see some common problems and weak points to check out before buying a used one. Just things an owner would know and someone would like to be informed of before looking at a used one. Great list other than that though, thanks.

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[Lyonsroar]

Originally Posted by Frye

It would be nice to see some common problems and weak points to check out before buying a used one. Just things an owner would know and someone would like to be informed of before looking at a used one.

Great list other than that though, thanks.

Those pretty much are the weak points. Engine mounts, thermostat and ECT sensor, brakes wear quickly, camshaft position sensor, and the fuel pressure regulator are all VERY common problems.

[bmwjeff55]

Great stuff.... I just bought an incredible 2000 s40 with 47k which has been painstakingly taken care of. I saw the frequently asked questions and the one about the brake primer and the faint vibrating sound when the car is cold and first started. Can you explain that a little? Thanks!!

[Lyonsroar]

Originally Posted by bmwjeff55

Great stuff.... I just bought an incredible 2000 s40 with 47k which has been painstakingly taken care of. I saw the frequently asked questions and the one about the brake primer and the faint vibrating sound when the car is cold and first started. Can you explain that a little? Thanks!!

When you turn the key to position II (ie accessory) you will hear a noise in the drivers side wheels well and maybe feel a vibration, this is only the brake pump priming and is 100% normal. However, if you have no brakes right at startup there is a recall about that and the dealer will take care of it for free.

[bmwjeff55]

Thanks for the quick response. Is the faint intermittent buzzing sound after the car is in gear and for about 30 to 60 seconds? The sound is coming from that same location. I have brakes and everything runs and sounds fine. It seems to only be when the car is cold. It puts me in mind of a delayed wiper motor sound. I just don't want to miss a warning or a possible problem. The gentleman that had the car documented everything that was done to the car from 10/99 to 12/09 and nothing shows up about this warning. Thanks again for the site and your time.

[Lyonsroar]

Originally Posted by bmwjeff55

Thanks for the quick response. Is the faint intermittent buzzing sound after the car is in gear and for about 30 to 60 seconds? The sound is coming from that same location. I have brakes and everything runs and sounds fine. It seems to only be when the car is cold. It puts me in mind of a delayed wiper motor sound. I just don't want to miss a warning or a possible problem. The gentleman that had the car documented everything that was done to the car from 10/99 to 12/09 and nothing shows up about this warning. Thanks again for the site and your time.

It's normal for the brake pump to work a little while into driving.
As long as you have braking power I wouldn't worry about it.

[underdog57]

My 2001 V40 blows oil out the exhaust when the turbo kicks in , And it leaks up front ...I heard the turbo seals might be the problem .
How to fix ? I work on a lot of stuff so not afraid to tear a car apart , !!
TIA

[tech]

I would guess the turbo is shot.

[Lyonsroar]

Originally Posted by tech

I would guess the turbo is shot.

Listen to tech. He knows what he's talking about. While you're at it, replace with a 14T FTW.

[underdog57]

Ok , will look at it , Thankyou for the info ...
The car was doing this a long time and steadily getting worse ...
It was doing this at 30k when I bought it used , now has 113k on it ...
An rebuild units available or suggestion on a place to buy a replacment ?
Apppreciate the help !!