Dynamic Friction 331-73642 rear right brake caliper for the 2005-2009 Audi A4 and other vehicles holds the brake pads and presses them against the rotor. Brake fluid pressure moves its piston, which is how this disc brake caliper slows the wheel.
A caliper that sticks or leaks can show up as the car pulling to one side or a wheel that drags. Worn pads or other brake faults can feel much the same, so during a brake service, with the engine off, look the caliper over and compare pad wear from side to side before you replace it.
It is a rear brake caliper for the 2005-2009 Audi A4 and the 2006-2009 Audi A4 Quattro, with one caliper on each side of the axle. This listing is one caliper for the rear right; the rear left is a separate part, and both sides are normally replaced together.
Fit and size
Build and materials
One brake caliper with its bleeder screw. Brake pads are not included.
Is this the right brake caliper for the 2005-2009 Audi A4?
Yes. Dynamic Friction 331-73642 fits the 2005-2009 Audi A4, and it also fits the 2006-2009 Audi A4 Quattro.
Is this a rear caliper for the 2005-2009 Audi A4 meant for the left or right side?
This caliper is for the rear right side. The rear left takes its own separate caliper.
Are Dynamic Friction brake calipers like this one sold with brake pads?
No. Dynamic Friction 331-73642 comes with its bleeder screw, and brake pads are not included.
What size piston does this brake caliper have?
This rear right caliper has one steel piston, 41 mm in diameter, in a cast iron casting.
How do I spot a leaking or sticking rear brake caliper?
Wetness around the piston boot or a burning smell from the wheel after driving can point to a leaking or sticking caliper. Other brake faults can show the same signs, so a shop can test it.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
