Audi A4 Bolt Pattern, Wheel & Tire Sizes
TL;DR
All A4 generations share a 5x112 bolt pattern and M14x1.5 bolts, but centre bore is 57.1 mm on pre-2008 cars (B5-B7) and 66.5 mm on 2008-and-later cars (B8-B9) - check your own placard before buying wheels.
Bolt pattern and centre bore by generation
The Audi A4 has kept the same 5x112 bolt pattern across every generation, which is unusual and convenient for wheel shopping. What did change is the centre bore, splitting the model's history into two eras: cars built through the B7 (up to about 2008) use a smaller 57.1 mm bore, while the B8 (2008 onward) and B9 (2015-2023) use a larger 66.5 mm bore. Fitting a wheel with the wrong bore onto the wrong hub is a common mistake - a 57.1 mm-bore wheel will not centre correctly on a 66.5 mm hub without an adapter ring, and vice versa.
Stud thread and torque
Across the generations covered here, the A4 uses M14x1.5 wheel bolts (not nuts - Audi uses bolts that thread into the hub) with a factory torque figure of roughly 120 Nm (about 89 lb-ft), tightened in a star pattern.
Where to confirm your exact car
Model-year running changes, regional builds and option packages (especially Sport and S line trims with larger brakes) can shift the exact stock wheel size even within one generation. Always confirm your own car using one of these authoritative sources:
- The tyre-placard sticker on the driver's door jamb, which lists the factory-approved wheel and tyre sizes and cold inflation pressures
- Your owner's manual, which lists approved wheel/tyre combinations and torque specs
- The markings stamped on your current wheels and tyre sidewalls
- An Audi dealer parts catalogue lookup by your car's VIN
| Generation / years | Bolt pattern | Centre bore | Stud thread | Stock wheel sizes | Common tire sizes |
|---|---|---|---|---|---|
| B5 (1994-2001) | 5x112 | 57.1 mm | M14x1.5 | 15-17 in (trim dependent) | 195/65R15 to 225/45R17 |
| B6 (2001-2005) | 5x112 | 57.1 mm | M14x1.5 | 16-18 in (trim dependent) | 205/60R16 to 235/40R18 |
| B7 (2004-2008) | 5x112 | 57.1 mm | M14x1.5 | 16-18 in (trim dependent) | 205/60R16 to 235/40R18 |
| B8 / B8.5 (2008-2016) | 5x112 | 66.5 mm | M14x1.5 | 16-19 in (trim dependent) | 205/60R16 to 245/35R19 |
| B9 (2015-2023) | 5x112 | 66.5-66.6 mm (sources vary slightly) | M14x1.5 | 17-19 in (trim dependent) | 225/50R17 to 245/35R19 |
A note on precision
Some listed figures - such as the exact centre bore decimal on the B9 (66.5 vs 66.6 mm) or the precise factory wheel width for a specific trim - vary slightly between reference databases. Where sources disagreed we have said so rather than pick one number; treat the door placard as the final word for your specific car.
Summary
| Bolt pattern (all generations) | 5x112 |
|---|---|
| Centre bore, B5/B6/B7 (1994-2008) | 57.1 mm |
| Centre bore, B8/B9 (2008-2023) | 66.5 mm (B9 sometimes listed as 66.6 mm) |
| Stud/bolt thread | M14x1.5 |
| Factory torque | ~120 Nm (89 lb-ft) |
| Stock wheel size range | 15 in to 19 in depending on generation and trim |
| Where to verify your car | Driver's door placard, owner's manual, current wheel/tyre markings |
Full diagnostics
For the complete step-by-step diagnostic and repair guide, see Audi A4: Common Problems, Fault Codes & Repairs.
Frequently asked questions
Did the Audi A4 bolt pattern ever change?
No - every generation from the B5 (1994) through the current B9 (2015-2023) uses the same 5x112 bolt pattern, so aftermarket wheels sized for 5x112 will bolt on across generations. What does change between eras is the centre bore, so you still need a hub-centric ring or the correct bore size for a clean fit.
What centre bore does my Audi A4 need?
If your A4 is a B5, B6 or B7 (built roughly 1994 through 2008), the factory centre bore is 57.1 mm. If it is a B8, B8.5 or B9 (built 2008 through 2023), the factory centre bore is about 66.5 mm. Confirm on your door placard or by measuring your current wheel if you are unsure which generation applies to your car.
What size lug bolts does the Audi A4 use, and how tight should they be?
Audi A4 models use M14x1.5 wheel bolts (threaded bolts into the hub, not separate nuts), factory-torqued to approximately 120 Nm (about 89 lb-ft) in a star or crisscross pattern. Always re-torque after the first short drive following a wheel change, and check your owner's manual for the exact figure for your model year.
Can I fit wheels from a newer A4 onto an older one?
Only if the centre bore matches or you use the correct hub-centric adapter rings. Because the bolt pattern (5x112) is identical across generations, a B9 wheel will physically bolt onto a B6 hub, but the B9's larger 66.5 mm bore will not centre on the B6's 57.1 mm hub without an adapter ring - skipping this can cause vibration.