A new steering rack for your B7 Audi A4 can be ordered in two different variants, depending on whether or not the new steering rack has a speed sensor port.
What the Speed Sensor Port Does
On some models of the B7 A4 (not all) there is a speed-sensitive power steering system, which adjusts the amount of assistance required as the car increases in speed. These power steering racks have a speed sensor port, whilst non-sensor powered racks have no port at all.
How to Identify Your Existing Rack
Locate the small threaded boss on the rack housing. If you see a small bung in this boss then your car has the sensor port version. A plain version steering rack does not have this boss.
Why Fitting the Wrong Variant Causes Problems
Fitting the wrong part can cause serious problems because a rack with a sensor port will have a different mounting geometry compared to a rack without a sensor port. Even when there is no sensor wiring, the opening can have to be blanked and can cause serious problems if fitted incorrectly.
Check Your Car’s Spec Before Ordering
There is more on the Audi A4 steering rack at //westernpowersteering.co.uk/vehicles/audi/audi-a4-b7-steering-rack-without-speed-sensor-port/.
Matching the Part Listing
When shopping for a new replacement part, ensure that the part listing specifically states “with” or “without” speed sensor port instead of limiting the search to the model year and trim level. This is a key detail that will distinguish between the two rack types on this generation of models.
Ensuring the correct detail regarding the speed sensor port prior to ordering will avoid a costly return and the resulting delay to your repair.
