To find out the bolt pattern for a 2009 Audi A4, you can:
* Check your owner's manual: The bolt pattern will usually be listed in the vehicle specifications section.
* Look at the wheels: The bolt pattern is often stamped on the back of the wheel.
* Use an online resource: Websites like Tire Rack and Wheel-Size.com have databases that list bolt patterns for various vehicles.
Keep in mind that the bolt pattern can vary slightly depending on the model and trim level of the 2009 Audi A4.
