Audi Q7: Acceptable Tread Depth Variance
Model with Longitudinally Installed Engine
Tread variance for models with a longitudinally installed
engine, such as A4, A5, A6, A7, A8, Q5, Q7, ...
In this case, the variance between the front and rear axle
may not be more than 2 mm
Note
- For all four wheels use only tires of the same construction
type, size, and tread.
- Excepted are vehicles that were shipped by Audi AG with
different sized tires on the front and rear axle.
- Always use tires with the deepest tread depth on the front
axle.
- Changing one individual tire is generally possible. Audi
recommends at the very least however that the tires are
exchanged on both sides of the axle.
- With sport differential on the rear axle, Audi recommends
always replacing the tires on both sides of the rear axle.
Note
The technical background of the limitations are thermal
pressure for the transmission oil due to a large difference in
the rolling circumference of the tires.
Models with Crossways Installed Engine
Tread depth variance for models with laterally installed
engine, such as A3, TT, Q3, A1, ...
In this case, the variance between the front and rear axle
may not be more than three mm
Note
- For all four wheels use only tires of the same construction
type, size, and tread.
- Excepted are vehicles that were shipped by Audi AG with
different sized tires on the front and rear axle.
- Always use tires with the deepest tread depth on the front
axle.
- Changing one individual tire is generally possible. Audi
recommends at the very least however that the tires are
exchanged on both sides of the axle.
- With sport differential on the rear axle, Audi recommends
always replacing the tires on both sides of the rear axle.
Note
The technical background of the limitations are thermal
pressure for the transmission oil due to a large difference in
the rolling circumference of the tires.
READ NEXT:
Tires, Rolling Noises, General Information
Rolling noise perceived by the human ear is caused by
vibrations transmitted from the noise source to the ear via the
air.
Here we are interested in noises
Vibration Causes
There are many causes for vibration. Vibration can also be
caused by tire wear, among other things.
Tire wear caused by driving does not always develop evenly
over the entire tread.
General Information
Before beginning balancing, the following requirements must
be fulfilled.
Tire inflation pressure must be OK.
The tire tread must not be worn down on one side and should
be at
SEE MORE:
Overview - Rear Window
1 - Rear Window
Before removing, disconnect all the connectors and secure the
contacts toward the inside to the middle of the window glass using
adhesive tape.
Removing and Installing. Refer to
→ Chapter "Rear Window, Removing and Installing".
2 -
High Pressure Sensor -G65-, Removing and Installing
WARNING
Danger due to refrigerant coming out under pressure
when there is a faulty valve in the refrigerant circuit.
Danger of frost bite to skin and other parts of the
body.
If the refrigerant starts to leak out of the
refrigerant li