Audi Q5 Big Brake Kit Upgrade / TTSPORT EPB TT8703/TT8903
The Audi Q5's 2.0 TFSI quattro powertrain and Torsen-based AWD system (40/60 front-rear split) give it real pace off the line, but the factory brakes on a car like this are sized for daily driving, not for repeatedly hauling down a tall, quattro-equipped SUV. Since the Q5 puts power to all four wheels, the owner treated braking the same way — upgrading front and rear together with a TTSPORT big brake kit rather than just the front axle.
Vehicle & Kit Specs
This was a full four-wheel brake upgrade: TT8703 calipers and a 380x34mm drilled rotor up front, and TT8903 calipers with a 380x28mm drilled rotor plus a TTSPORT electronic parking brake (EPB) component in back.
| Item | Specification |
|---|---|
| Vehicle | Audi Q5, 2.0 TFSI quattro AWD (7-speed S tronic); fits behind factory wheels |
| Front caliper | TTSPORT TT8703 |
| Front rotor | TTSPORT 380mm x 34mm drilled rotor |
| Rear caliper | TTSPORT TT8903 |
| Rear rotor | TTSPORT 380mm x 28mm drilled rotor |
| EPB hardware | TTSPORT electronic parking brake (EPB) component for factory parking brake compatibility |
Why It Works
Bigger rotors carry more thermal mass, so they absorb and shed heat more consistently under repeated hard stops instead of fading. The 380mm drilled rotors front and rear give the Q5 more swept area and venting than the stock discs, while the larger front (34mm) rotor over the rear (28mm) reflects the front axle's greater share of braking load under a quattro setup.
- Fits behind the factory wheels — no spacers needed
- Rear TT8903 caliper retains the Q5's electronic parking brake function via the TTSPORT EPB component
- Drilled rotors front and rear for added surface venting under repeated hard braking
Installation Gallery
Does this TTSPORT kit work with the Audi Q5's electronic parking brake?
Will the kit fit behind the Q5's factory wheels?
What size rotors come with this kit?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.