More Z4 Pain!

[davewuyts]

Love driving the Z4....
But now a bit of a list of problems inc major under-carpets and boot water ingress... now completely dry.
Still has slack handbrake, cloudy headlamp, loose under-car tray and bogus service history!

Biggest frustration is an airbag light which throws up the following codes:

983E - SBSL Control unit fault

93DB Sim control unit undefined status

Any clarity from you all on what that is? Obviously the water must have had something to do with it.

Dave

[bigwinn]

If you have had water ingress into the airbag control modules the faulty ones will need replacing and recoding

Have you solved the water ingress fully?

[davewuyts]

Yes the water has been fully dealt with. The previous owner had issues with the roof clamping properly and had a new motor there, I think it must have come in then as there are no leaks but over a gallon of water came out. It’s completely dry now, took 2 whole days with carpet up and used a dehumidifier to dry everything completely. I was hoping the module attached to the rails under the seat was ok, it wasn’t actually in the water, which was all under the carpet on the left hand side. Does it mean going to the dealer?

[enuff_zed]

Yes the water has been fully dealt with. The previous owner had issues with the roof clamping properly and had a new motor there, I think it must have come in then as there are no leaks but over a gallon of water came out. It’s completely dry now, took 2 whole days with carpet up and used a dehumidifier to dry everything completely. I was hoping the module attached to the rails under the seat was ok, it wasn’t actually in the water, which was all under the carpet on the left hand side. Does it mean going to the dealer?

The module under the rails is the Yaw sensor.
Your issue sounds more like the airbag module behind the B-pillar trim on the left side.
bigwinn has much more experience with these than I have though so I'll let him carry on.

[bigwinn]

I’m sure the dealer will gladly take your cash…

If it were me I’d get the oem module numbers and look for second hand ones that can be coded to the car by someone with the software

[davewuyts]

Really helpful guys, Thankyou. I presume I get the oem number from the unit itself?

[enuff_zed]

Really helpful guys, Thankyou. I presume I get the oem number from the unit itself?

Indeed yes. Then you can put it into Realoem and see which ones are compatible with it.
Then a wanted ad on here and cross your fingers.

This topic shows you what you are looking for.
viewtopic.php?t=139299

[davewuyts]

Great!
Thankyou!

[paddy wright]

Hope you get sorted, nice to see someone fixing a sad z!