jimmyjames72

hey all i have a 2004 audi a6 2.7t not sure what the C5/C6 thing means or how to find out which one i have? anyway i have a speedometer that flickers and shutters and sometimes doesnt work..ran a code and it said speed sensor...is this an easy fix? i cant find a video or instructions anywhere to see how to do it...please advice and thank you all in advance im new to the forum and willl post pics soon

A6Gary

Your '04 A6 is a C5 platform, but you probably have a failing vehicle speed sensor. Per ETKA 7, it is mounted on the driver's side differential case at about the 1 o'clock position. P/N is 012–409–191–D.

jimmyjames72

thank you so much for the help....i never knew with the speddo not working it messes up the readingon my trip odometer and my fuel gauge...thanks again...whats the difference between the c5/c6 platform?

Prospeeder

On B6 A4s and some late model C5's the Left front wheel speed sensor is for the speedometer input. It goes to the ABS module, then is sent to the instrument cluster and ECU. If the sensor is good, the wiring from the sensor to the module is good, then its the module. Seen it 3 times so far be the module on 03+ Audis.

A6Gary

There are significant differences between the C6 and C5 platforms:

* C6 has larger body dimensions than a C5
* C6 standard engine is the 3.2L FSI V6 with no timing belt while the C5 had several engines: 2.8L 30V V6, 3.0L V6, 2.7L Biturbo V6 (none of whoch had the direct injection system [FSI], but all had timing belts). 4.2L V8s were available in both the C5 and C6.
* C6 is only offered in NA with only a 6-speed Tiptronic (automatic), C5 was offered with both 5 & 6 speed manual transmissions and 4 & 5 speed automatic transmissions.
* C6 standard wheels are 17 inch, C5 standard wheels were 15 inch.

jimmyjames72

thanks alot for the information.. i love my audi and hope to have it for a long time to come...so i bought the VSS vehicle speed sensor....now to instal..this is what the code said it was...is this a hard install or easy and does anyone where i can get a vehicle diagram of how to do it.?

jimmyjames72

so we installed the VSS sensor to no avail..the speedo still doesnt work , just jumps around so often..please advice on apart number for something on th eleft fron wheel ABS which they say may be the speedo controller/