BMW 5 Series Big Brake Kit Upgrade / TTSPORT Classic 8703

The BMW 5 Series wears its sporty streak well, but the factory brake system on this generation has never matched the car's dynamic reputation — a soft, long-travel pedal is one of the most common complaints from owners who push the car even a little. This case swaps the stock setup for a TTSPORT front six-piston / rear four-piston big brake kit, built to give the pedal real bite without touching the car's factory 19-inch wheels.

TTSPORT has shipped several thousand brake kits for BMW 3 Series and 5 Series owners, and this front six / rear four combination is the one most commonly recommended for a mid-size sedan like the 5 Series — enough clamping force and rotor mass to matter on a back road, without needing a wheel or spacer change.

Vehicle & Kit Specs

Here's the hardware that went on this build:

Why It Works

• A forged six-piston caliper is stiffer than the factory sliding caliper, so pedal input translates into clamping force instead of getting soaked up by flex — that's the fix for the soft, vague pedal owners complain about.
• Bigger 380mm rotors front and rear carry more thermal mass than stock, and the slotted face keeps dust from baking onto the surface and staining the wheel over time.
• The rear rotor's ventilation and slotted design push heat-crack resistance up more than 40% over a solid rotor, which matters on repeated hard stops rather than a single panic brake.
• The rear TT EPB caliper is built to work with the car's electronic parking brake, so this isn't a "manual e-brake conversion" — the factory parking brake function stays intact after the swap.
• Both the front and rear calipers were confirmed to clear the car's factory 19-inch wheels on this install, with no spacers involved.

Installation Gallery