The bolt pattern on a 2004 Audi S4 is 5x112 mm — five lug studs on a 112 millimeter circle. This configuration is standard for the model and is shared with many other Audis from that era.
Understanding the 5x112 pattern
The designation 5x112 means there are five mounting holes arranged on a circle that is 112 millimeters in diameter. This pattern determines which wheels will physically bolt onto the hub and how they align with the braking components and fenders. For the 2004 S4, this 5-lug, 112 mm arrangement is the defining fit for wheels intended for this car.
Center bore and lug hardware considerations
When selecting replacement wheels, you should also consider the hub bore size and the lug hardware. For many Audis, the hub bore is 66.6 mm, and the typical lug bolt size for this pattern is M14x1.5. If your chosen wheels have a different center bore or bolt specification, you may need hub-centric rings or adapters to ensure proper alignment and safe installation. Always verify the exact specifications for your vehicle and wheel combination.
Why this matters for wheel choices
Choosing wheels that match the 5x112 bolt pattern ensures proper fitment, alignment, and safety. An incompatible pattern can lead to installation issues, vibrations, and interference with braking components. For the 2004 S4, sticking with wheels that explicitly list a 5x112 pattern helps maintain factory geometry and performance.
Summary
In short: The 2004 Audi S4 uses a five-lug, 112-millimeter bolt circle pattern (5x112). When shopping for wheels, confirm the pattern, center bore (typically 66.6 mm for Audi), and lug bolt size (commonly M14x1.5) to ensure a correct and safe fit.