lamp assembly BMW 525i 2001 E39 User Guide

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Battery, Starter, ~lternatorl
Charging system quick-check
Use a digital multimeter to measure voltage across the bat-
tery terminals with key off and then again with engine running.
Battery voltage should be about 12.6 volts with key off and be-
tween 13.5 and 14.5 volts with engine running.
NOTE-
The regulated voltage (engine running) should be between
13.2 and 14.5, depending on temperature andoperating con-
ditions.
If the voltage is higher than 14.8, the voltage regula-
tor or
mulitfunction controller is most likely faulty
Check for clean and tight battery cables. Check ground cable
running from negative
(-) battery terminal to chassis and
ground cable running from engine to chassis. Check alterna-
tor drive belt condition and tension.
Charging system, checking
CAUTIOI\C
* Do not disconnect the battery while the engine is running.
Damage to the alternator and/or engine electronic systems
may result.
Only use a digital multimeter when testing charging
system components.
--7
4 Turn ignition key on. Check that battery warning light comes
on.
NOTE-
If the warning light does not come on, repair bulb or wiring
faults before continuing to checlc the charging system.
/ Charge indicator
502820805
4 6-cylinder engines only, remove complete air filter housing:
Loosen
intake duct hose clamp (A) at throttle assembly.
Loosen clamp and remove idle control hose from intake
duct
(B) and disconnect idle speed control valve electrical
harness connector.
Disconnect electrical harness connector
(C) from mass air
flow sensor.
Remove air filter housing mounting screw
(D).
Disconnect vent tube (E).
Loosen air intake duct clamp (F).
Carefully lift air filter housing out of engine bay.

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Battery, Starter, ~lternatorl
Alternator, removing and installing
(6-cylinder engine)
A replacement alternator should have the same rating as the
original. Alternator manufacturer and ampere rating are nor-
mally marked on the alternator housing.
- Disconnect negative (-) battery cable.
CAUTION-
Prior to disconnecting the batteg read the battery discon-
nection cautions given
in 001 General Warnings and Cau-
I tions.
Remove complete air filter housing:
Loosen intake duct hose clamp
(A) at throttle assembly.
Loosen clamp and remove idle control hose from intake
duct
(B) and disconnect idle speed control valve electrical
harness connector.
Disconnect electrical harness connector
(C) from mass air
flow sensor.
* Remove air filter housing mounting screw (D),
Disconnect vent tube (E).
Loosen air intake duct clamp (F).
Carefully lifl air filter housing out of engine bay.
Remove alternator drive belt. See belt removal procedures in
020 Maintenance.
- Remove radiator cooling fan and fan shroud. See 170 Radi-
ator and Cooling System.
NOTE-
The radiator cooling fan nut (32 mm wrench) has left-hand
threads.
- Unbolt power steering fluid reservoir and bracket. Suspend to
one side without detaching fluid hoses.
- Disconnect alternator air cooling tube.
- Disconnect wiring from rear of alternator.
'4 Remove upper and lower mounting bolts (arrows) and lift
alternator.
If idler pulley for belt interferes, remove pulley cover and
retaining bolt to remove pulley. out

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I Battery, Starter, Alternator
- Check for battery voltage at terminal 50 of starter motor with
key in start position. If voltage is not present, check wiring be-
tween ignition switch and starter terminal. Check the EWS
system and other inputs that disrupt terminal
56 to the start-
er. See ELE Electrical
Wiring Diagrams. If voltage is
present and no other visible wiring faults can be found, prob-
lem is most likely in starter motor.
Starter, removing and installing
(6-cylinder engine)
The starter is removed from below. Access to starter bolts is
difficult. Be sure to have the proper tools on hand before pro-
ceeding.
NOTE-
Access to the starter wiring is very limited. Forbetteraccess,
it may be necessary to remove the intake manifold.
- Disconnect negative (-) battery cable.
CAUTIOI\C
Prior to disconnecting the battern read the baltery discon-
nection cautions
in OOlGeneral Cautions and Warnings.
Remove complete air filter hous~ng:
Loosen intake duct hose clamp (A) at throttle assembly.
Loosen clamp and remove idle control hose from intake
duct
(B) and disconnect idle speed control valve electrical
harness connector.
Disconnect electrical harness connector
(C) from mass air
flow sensor.
Remove air filter housing mounting screw (D)
Disconnect vent tube
(E).
Loosen air intake duct clamp (F).
Carefully lift air filter housing out of engine bay.
Disconnect throttle cable.
Raise vehicle and support safely.
WARNING-
Make sure the car is stable and well supported at all times.
Use a professional automotive
lift orjack stands designed for
the purpose. A
floorjaclc is not adequate support
- Working underneath car, remove engine splash shield
- Disconnect fuel lines and harness connectors from retaining
brackets, as necessary.

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Fuel Injection
MS 43.0 throttle valve assembly, replacing
The electronic throttle valve assembly forthe MS43.0 system
is referred to as
EDK (electronic throttle valve). There is no
mechanical (cable) link between the accelerator pedal and
the throttle plate.
< The accelerator pedal module (PWG) at the pedal assembly
communicates the pedal position directly to the ECM. The
module provides two variable voltage signals (via two Hail
sensors) to the ECM for pedal position and rate of movement.
NOTE-
The EDK unit is non-adjustable and must be replaced as a
complete unit if found to be faulty
If replacing the
EDK unit, the adaptation values stored in
the
ECM must be cleared and the new unit initialized using
BMW special service tools.
CAUTIOIG
If the adaptation process is not completed correctk the en-
qine will not start
- Disconnect battery negative (-) cable in luggage compart-
ment.
CAUTION-
Prior to disconnecting the battery, read the battery discon-
nection cautions given in
001 General Warnings and Cau-
tions.
< Remove complete air filter housing:
- Disconnect electrical harness connector on mass air flow
sensor
(A).
Disconnect vacuum line at intake boot (6).
Loosen intaite air duct clamp (C).
Remove filter housing mounting screws.
Disconnect air duct and lift complete air filter housing and
MAF sensor out of engine compartment, pulling it forward
away from throttle housing.

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.. - --
Radiator and Cooling System
Tightening torques
Coolant pump to timing chain 10
Nm (89 in-lb)
cover
Coolant pump
pulley to coolant
pump
10 Nm (89 in-lb
Engine
blocic drain plug to block 25 Nm (18 ft-lb)
Radiator drain plug to radiator
2-3Nm(18-27in-lb)
Thermostat cover to coolant
pump assembly 10 Nm (89 in-lb)
Radiator, removing and installing
Removal of the radiator is similar for V-8 and 6-cylinder mod-
els.
- Raise front of car and support safely.
WARNING -
Make sure the car is stable and well supported at aN times.
Use a professional automotive liff
orjaclc stands designed for
- Remove splash shield from under engine.
- Drain radiator and engine block. See Coolant, draining and
filling
(V-8 models).
WARNING -
Allow cooling system to cool before opening or draining sys-
tem.
< Remove air filter housing:
Disconnect electrical harness connectors
(A and B).
Loosen clamps (C and D).
Remove mounting fastener (arrow) and remove air filter
housing together with mass air flow
(MAF) sensor.

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... .
Exhaust System
- With exhaust system fully cold, raise and support car for ac-
cess to exhaust system.
WARNING -
Do not worlc under a lifted car unless it is solidly supported on
jack stands designed for that purpose. Never work under a
car that is supported solely by a
jack.
- Disconnect oxygen sensor connector(s).
4 Loosen and remove bolts holding front exhaust pipes to ex-
haust manifolds (arrows). Right side of
V8 model shown.
- Support exhaust system
- Where applicable, disconnect exhaust support bracket as-
sembly from transmission.
< Remove hangers by prying off bracket (arrows).
- Lower exhaust system as a single unit to ground.
NOTE-
If the catalytic converterlfront exhaust pipe assembly is to be
replaced, transfer the oxygen sensors to the new
pipe(s).
Tightening torque
Oxygen sensor
55 Nm (41 ft-lb)
- installation is reverse of removal.
* Make sure there is at least 20 mm (314 in.) clearance be-
tween exhaust system and car body at every point.
Loosely install
ail exhaust system mounting hardware and
hangers before tightening fasteners to their final torque.
Coat manifold studs with copper paste before installing
nuts.
NOTE-
Where applicable, tighten front pipe with semi-flexible com-
pensator last when installing front pipe to
manifolds.
Tightening torques
Exhaust manifolds
to cylinder head 22 Nm (1 7 It-lb)
Front exhaust pipe to manifolds 30 Nm (22 ft-lb)
To prevent exhaust system rattles and vibration, the system
should be slightly preloaded by pushing the rear clamping
brackets forward about 7 mm (114 in).

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/Exhaust System Muffler, replacing
BMW offers individual mufflers as replacement parts for the
original one-piece assembly. Replacement of a rear muffler
may be possible with the system installed on the car. Re-
placement of the front or middle muffler should only be done
with the exhaust removed from the car.
< Mark length of new muffler pipe(s) on old system.
- Use exhaust pipe cutter to cut pipe(s). Deburr cut pipe
end@).
4 Use clamping sleeves to join new pipe(s) to old.
Make sure pipe ends are centered inside sleeve.
Point clamping sleeve bolt threads
(arrows) down.
- Reinstall exhaust system.

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pearshift Linkage
~UTOMATIC TRANSMISSION
GEARSHIFT
Automatic transmission gearshift mechanism
automatic
5-speed Steptronic (5251,530i)
1. Shift lock solenoid
2. Shifter assembly
3. Shift cable
4. Support bracket
5. Selector lever
Gearshift mechanism, adjusting
(automatic transmission)
- Position gearshift lever in Park.
- Raise vehicle to gain access to shift linkage.
WARNING -
Make sure the car is stable and well supported at all times.
Use a professional automotive
lift orjack stands designed for
the purpose.
4 Counterhold bushino A and loosen cable clam~ino nut 6.
Push cable end backward away from engine (arrow 2).
Release pressure on cable.
Tighten clamping nut.
/ CAUTION--
Tightening torque
Shift cable clamping nut
10 Nm (7.5 it-lb)

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31 0-1 0
Front Suspension
4 Clamp spring compressor (BMW special tool 31 3 340 or
equivalent) in shop vise.
WARNING-
* Do not attempt to disassemble the strut assembly without
a spring compressor designed specifically for this job.
Prior to each use,
checlc special tool for functionality.
Do not use a damaged tool.
Do not make any modifications to tool. Use correct size spring retainers when compressing
coil spring.
I When assembling BMW spring compressor (special
tool
31 3 340), make sure spring retainerplates are felt
and heard snapping into place. Check seating of spring
retainers carefully.
Position coil spring between spring holders so that
3 coils lie
between spring holders
(arrows). Compress spring.
WARNING -
When tensioned, the spring coils must rest completely in
the spring holder recess.
Never tighten or loosen spring compressor with an im-
pact tool.
Only tighten down the coil springs until stress on the
thrust bearing is relieved.
a Only loosen strut nut if spring coils are completely in-
serted in the spring holder grooves. If
necessarx loos-
en compressor, reposition and recompress.
Use
BMW special tool 31 2 21 0 or equivalent to remove strut
nut. Counterhold strut shaft using
6 mm Allen wrench.
CAUTION-
Do not remove strut nut with impact tool.
Remove upper strut bearing and related components.
If a new coil spring is being installed, relieve tension on
spring compressor and remove coil spring.
Check strut dust boot, rubber stop and spring pads. Replace
as necessary.
Replace strut, upper strut mount or spring, as needed

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320-1 5
Steering and Wheel ~li~nmentl
Remove steering shaft coupler clamping bolt (arrow) at base
of column.
Slide lower steering shaft forward to gain access to column
mounting shear bolts.
< Drill steering column mounting shear bolts (arrow) and use
easy-out to remove.
Remove upper steering column mounting bolts
(arrows).
Remove upper steering column.
Disconnect electrical harnesses from steering column
switches.
4 Release lock (A) and pull up on harness connector
connect harness.
Remove wiring harness mounting bolt
(C).
- Remove steering column assembly.
(B) to dis.