B8 A4 Power Steering Judder

[WillJ]

Hi,

My A4's power steering judders when manoeuvring at low speed (parking etc). I've found a Technical Service Bulletin (Page 1) that EXACTLY matches the problem but Audi don't want to know as it is for the CAEB not the CDNC model which my car is. As far as I know the only difference between the model is that the CAEB is a saloon (sedan) and mine is the avant. Does anyone know if there a more fundamental difference between the two - mechanically? Should the TSB apply to both?

Any help / advice is welcome.

Thanks

Will


B8 A4 quattro avant 2.0L TFSI

[ChasW]

We have a 2009 A4 Avant Tdi 170. While still under warranty I complained to my local dealer about steering judder when on full lock at low speeds. At first they denied there was an issue blaming it on tyre wear. Then I got the master technician involved and he changed the wheels. tested it again and the problem remained. Then they fixed it under warranty. They fitted a modified PAS pump according to the invoice.

[Rich_W]

CAEB is an engine code. As is CNDC. Can be internal differences or no difference at all.

TSHs don't count if there's any difference between engine, gearbox or even manufacturing date.

Could be a PAS pump as above. It's not clear if your cars under warranty or not. If it is they "ought" to ignore the TSH and just diagnose as if it's a different fault. Which may be easier said than done.

Edited by Rich_W on Saturday 27th December 20:30

[Polome]

Last month daughters car had very similar problem...steering wheel juddering at low speeds...turned out the alternator drive pulley clutch had seized . This was causing the spring loaded belt tensioner to cycle back & forth making the rubber drive belt go slack and tight repeatedly. Subsequently the drive belt was rhythmically slipping on the power steering pump giving the judder at the steering wheel . Looking under bonnet at tick over showed the drive belt vibration/ jumping. A new clutch pulley ( £85 fitted) cured the fault. Sorry for long winded explanation...Google a4 alternator pulley fault. It's a common ( audi) fault and certainly worth a check....good luck