Thread: D4 Suspension Problem

Leave overnight with the 20A suspension system fuse removed. This will prevent periodic levelling which will then allow a leaking corner to lower by itself. Leaking can be from an air-spring or the corner valve in the valve block.

Thanks Greame
So you think a sensor, more likely air leak.
Looking at it today and comparing to other D4s I see around, the whole front is sitting low.
Very frustrating.
I think it’s been that way for a while, now that I think about it.
Vin

An air leak is easy to confirm or rule out and needs to be ruled-out before considering sensor calibration.

Hi
Last night I measured both sides of car, 4mm difference for the record.
Pulled the fuse.

This morning the car had not dropped at all, mm perfect.

I monitor as I drive it today.

The front still seems too low compared to back.
I will compare against friends D4 today.

Thanks

Originally Posted by rhinosm

Hi
Last night I measured both sides of car, 4mm difference for the record.
Pulled the fuse.

This morning the car had not dropped at all, mm perfect.

I monitor as I drive it today.

The front still seems too low compared to back.
I will compare against friends D4 today.

Thanks

Take measurements from the wheel arch to the hub centre. Front should be 466mm, rear 485mm. That will tell you if it’s sitting low.

Re calibrate the height sensors now that you've established there's no leak.

Thanks
whats involved in Re calibrating sensors?
vin

Originally Posted by DiscoJeffster

Take measurements from the wheel arch to the hub centre. Front should be 466mm, rear 485mm. That will tell you if it’s sitting low.

And unless you are in Tight Tolerance Mode, individual heights can vary by up to 10mm. So it is possible to see a 20mm difference across the front or rear.