How to change front brake discs on BMW E46 touring – replacement guide
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Recommended replacement interval for the part category Brake disc : 50000km
Important!
This replacement procedure can be used for:
BMW 3 Touring (E46) 330 xd,
BMW 3 Touring (E46) 330 xd,
BMW 3 Touring (E46) 330 xi,
BMW 3 Touring (E46) 330 i,
BMW 3 Touring (E46) 330 d
…
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The steps may slightly vary depending on the car design.
How to change front brake discs / front brake rotors on BMW 3 (E46) [TUTORIAL AUTODOC]
All the parts you need to replace – Brake Discs for 3 Touring (E46) and other BMW models
Replacement: brake discs – BMW E46 touring. AUTODOC recommends:
Replace the brake disks on the car BMW E46 touring in complete set for each axis. Regardless of the state of components. This will ensure even braking.
The replacement procedure is identical for both brake disks on the same axle.
When changing the brake discs, always replace the brake pads.
Please note: all work on the car – BMW E46 touring – should be done with the engine switched off.
Carry out replacement in the following order:
Step 1
Open the bonnet. Unscrew the brake fluid reservoir cap.
Step 2
Secure the wheels with chocks.
Step 3
Loosen the wheel mounting bolts. Use wheel impact socket #17.
Step 4
Raise the front of the car and secure on supports.
Step 5
Unscrew the wheel bolts.
Replacement: brake discs – BMW E46 touring. Tip from AUTODOC:
To avoid injury, hold up the wheel when unscrewing the bolts.
Step 6
Remove the wheel.
Step 7
Spread the brake pads. Use a crowbar.
Step 8
Detach the brake caliper retaining spring. Use a crowbar.
Step 9
Remove the dust boot caps of the brake caliper guide pins. Use a crowbar.
Step 10
Unscrew the brake caliper fastening. Use HEX No.H7. Use a ratchet wrench.
Step 11
Remove the brake caliper.
Replacement: brake discs – BMW E46 touring. Professionals recommend:
Tie the caliper to the suspension or to the body with a wire without disconnecting from the brake hose to prevent depressurization of the brake system.Make sure that the brake caliper is not hanging on the brake hose.Don't press the brake pedal after the brake caliper has been removed. As a result, the piston can fall out from the brake cylinder, and brake fluid leakage and depressurization of the system may occur.
Step 12
Remove the brake pads.
Step 13
Clean the brake caliper bracket fasteners. Use a wire brush. Use WD-40 spray.
Step 14
Unscrew the caliper bracket fastening. Use a drive socket #16. Use a tap wrench. Use a ratchet wrench.
Step 15
Remove the caliper bracket.
Step 16
Clean the brake disk surface. Use a wire brush. Use WD-40 spray.
Step 17
Unscrew the brake disc fastening. Use Torx T30. Use an impact screwdriver.
Replacement: brake discs – BMW E46 touring. AUTODOC experts recommend:
If necessary, use a rubber mallet.
Step 18
Remove the brake disc.
Step 19
Clean the hub. Use a wire brush. Treat the contacting surface. Use copper grease.
Step 20
Install the brake disc.
Step 21
Tighten the brake disc fastening. Use Torx T30. Use a torque wrench. Tighten it to 16 Nm torque.
Step 22
Clean the mounting seats of the caliper and its bracket. Use a wire brush. Use WD-40 spray.
Step 23
Install the brake caliper bracket.
Step 24
Tighten the brake caliper bracket. Use a drive socket #16. Use a torque wrench. Tighten it to 110 Nm torque.
Step 25
Treat the brake caliper piston. Use a brake cleaner.
AUTODOC recommends:
Replacement: brake discs – BMW E46 touring. After applying the spray, wait a few minutes.
Step 26
Press in the brake caliper piston. Use brake caliper wind back tool.
Step 27
Install the brake pads.
Step 28
Install the brake caliper and fix it. Use HEX No.H7. Use a torque wrench. Tighten it to 30 Nm torque.
Step 29
Install the dust boot caps of the brake caliper guide pins.
Step 30
Install the brake caliper retaining spring.
Step 31
Clean the brake disk surface. Use a brake cleaner.
Replacement: brake discs – BMW E46 touring. Tip from AUTODOC experts:
After applying the spray, wait a few minutes.
Step 32
Treat the surface where the brake disc contacts the wheel rim. Use copper grease.
Step 33
Install the wheel.
AUTODOC recommends:
Important! Hold the wheel while screwing in the fastening bolts. BMW E46 touring
Step 34
Screw in the wheel bolts. Use wheel impact socket #17.
Step 35
Lower the car and working in a cross order, tighten the wheel bolts. Use a torque wrench. Tighten it to 120 Nm torque.
Step 36
Remove the jacks and chocks.
Replacement: brake discs – BMW E46 touring. Tip from AUTODOC:
Check the brake fluid level in the expansion tank and refill if necessary.
Step 37
Tighten the brake fluid reservoir cap.
AUTODOC recommends:
BMW E46 touring – Without starting the engine, press the brake pedal several times until it feels firm.
Step 38
Close the hood.
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