BMW
Backing plate Installation
Overview
This install routes cool air, from the front duct inlets to the brake discs, on BMW 1,2,3,4 and M series cars. Expect more stable rotor temps over 20–30 minute sessions, when combined with appropriate pads and fluid.
Safety: Support the car on stands, chock wheels, and follow the BMW workshop manual. Verify hose/tire/line clearance at full lock and full bump before driving.
Tools & Supplies
- Jack, axle stands
- Socket set, ratchet
- Trim clip tool, side cutters, scissors
- 2" (51mm) high-temp duct hose, zip ties/P-clamps
- Loctite 243 (blue)
Steps
1) Prep & lift. Loosen front wheel bolts, lift and support the vehicle, remove wheels
2) Remove brake caliper
3) Remove brake disc
4) Remove backing plate/ dust shield
5) Install left/right plates
6) Mount hose to intake on backing plates
7) Secure hose on backing plates with jubilee clip
8) Reassemble & clearance check. Turn steering lock-to-lock and compress suspension where possible; ensure no contact.
9) Final torque & road test. Torque wheel bolts to BMW spec. Short road test, then recheck clamps and fasteners.
Troubleshooting
- Hose rub: Re-route and add a P-clamp; trim excess length.
- Limited steering: Rotate barb to change hose angle; shorten hose.
FAQ
- Compatibility: BMW 1 2 3 4 M; confirm caliper/rotor combos.
- Daily use: Inspect hose monthly; avoid curb impacts on inlets.