Audi Q3: 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.

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Tires, Rolling Noises, General Information
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Here we are interested in no
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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 tr
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Trailer brakes
If the trailer has its own brake system, then follow
the manufacturer specifications. However,
the brake system on the trailer must never be
connected to the vehicle brake system.
Safety chains
Make sure the safety chains are correctly applied
when pulling a trailer. The chains should
Left/Right HID Headlamp Bulb -L13-/-L14-, Removing and Installing,
through MY 2014
WARNING
High voltage poses a life-endangering risk, injury
risk and environmental hazard.
HID headlamp usage and safety precautions. Refer to
→ Chapter "HID Headlamp Usage and Safety Precautio