3 Series E46 316i (M43TU) SAL
Poor braking effect in spite of great
force on pedal
Brake-pedal travel short
Brake booster malfunctions - engine
vacuum
Check brake booster system
- Check engine (valves, cylinder
head gasket etc.)
Poor braking effect in spite of great
force on pedal
Brake-pedal travel long
One brake circuit failed due to leaks
or damage
Leakage test of brake system
Brake-pedal motion too soft and
spongy
a)
Air in braking system
b)
Insufficient brake fluid in
expansion tank
c)
Overheated brake fluid - vapour
lock due to excessive water
content in brake fluid or
excessive brake loads
a)
Bleed brakes
b)
Top up or change brake fluid
Bleed brakes
c)
Top up brake fluid
Bleed brakes
Brake-pedal travel is excessive even
though brakes have been bled and
adjusted
a)
Primary cup in master cylinder
damaged
b)
Separating cups on floating
piston of tandem-brake master
cylinder leak
c)
Leak in braking system
a)
Replace master brake cylinder
b)
Replace master brake cylinder
c)
Leakage test of brake system
Fault
Cause
Remedy
Uneven pad wear
a)
Wrong type of pads/liners
b)
Dirty fist caliper recesses,
damaged caps
c)
Corrosion in floating calipers
d)
Swollen rubber ring for piston
control
a)
Replace brake linings
b)
Remove and install, repair or
replace floating calipers
c)
Remove and install, repair or
replace floating calipers
d)
Remove and install, repair or
replace floating calipers
Brake pads worn at angle
a)
Wheel-bearing play excessive
b)
Brake disc not aligned with fist
caliper
c)
Corrosion in floating calipers
d)
Angular brake-disc wear
e)
Pads worn to less than
minimum thickness
f)
Spring force insufficient
g)
Guide bolts damaged
a)
Replace wheel bearings
b)
Check floating caliper
installation
c)
Remove and install, repair or
replace floating calipers
d)
Grind or replace brake discs
e)
Replace brake linings
f)
Replace spring
g)
Replace guide bolts
Seized brake pads, pad does not
move off brake disc
a)
Dirty fist caliper recesses,
damaged caps
RA Troubleshooting the brake system
BMW AG - TIS
19.01.2013 13:34
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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