View Measure M

Measure no.
4690692-04

Subject
Failure of the LF20 power steering pump

Release date (mm/dd/yy)
1/25/06

Status
Approved

Organization
CN, CAR

Vehicles affected

E series
E46

Engine
M52 M52/TU M54 M56

Body

Production period (from/to)
(mm/dd/yy)
/

Comment on production period

Feedback (all cases relating t
measure up to) (mm/dd/yy)

Complaint
Increased effort is required to turn the steering wheel when cornering or parking.

Note:
E46 all-wheel-drive variants are NOT affected by the problem.

Cause
Cause:
Impurities in the power steering fluid lead to increased wear of the LF20 power steering pump. This may
result in damage to the drive shaft.

Measure
Service measure:
In the event of a customer complaint, replace the LF20 power steering pump with an LF30 power steeri
pump.

Note:
This service measure must only be carried out if the power steering intermittently/permanently fails as a
result of the cause described. If the power steering pump is damaged on the outside (e.g. leaks), the LF
pump must be fitted again.

The following list shows which LF30 pump must replace the LF20 pump.

Right-hand-drive vehicles:
Old power steering pump (LF20): BMW part no. 32 41 6 750 423
New power steering pump (LF30): BMW part no. 32 41 1 094 965
It is also necessary to proceed with the replacement of the new flexible hose (BMW part no: 32 41 1 09
737) and the new return line (BMW part no: 32 41 1 094 953).

Old power steering pump (LF20): BMW part no. 32 41 6 760 036
New power steering pump (LF30): BMW part no. 32 41 1 094 965
It is also necessary to proceed with the replacement of the new flexible hose (BMW part no: 32 41 1 09
737) and the new return line (BMW part no: 32 41 1 094 953).

Old power steering pump (LF20): BMW part no. 32 41 6 760 034
New power steering pump (LF30): BMW part no. 32 41 6 756 582
It is also necessary to proceed with the replacement of the new flexible hose (BMW part no: 32 41 6 77

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273).

Left-hand-drive vehicles:
Old power steering pump (LF20): BMW part no. 32 41 6 750 423
New power steering pump (LF30): BMW part no. 32 41 1 094 965
It is also necessary to proceed with the replacement of the new flexible hose (BMW part no: 32 41 6 76
725).

Old power steering pump (LF20): BMW part no. 32 41 6 760 036
New power steering pump (LF30): BMW part no. 32 41 1 094 965
It is also necessary to proceed with the replacement of the new flexible hose (BMW part no: 32 41 6 76
725).

Old power steering pump (LF20): BMW part no. 32 41 6 760 034
New power steering pump (LF30): BMW part no. 32 41 6 756 582
It is also necessary to proceed with the replacement of the new flexible hose (BMW part no: 32 41 6 76
725).

Series production measure:
None.

Fault

Fault location

Nature of fault

Condition

Chassis, Steering

Distinct perception

Driving operation,
Driving/stationary, Stopped

Chassis, Steering

Distinct perception

Driving operation,
Driving/stationary, While driving

Chassis, Steering

Distinct perception, Increased
operating force

Driving operation,
Driving/stationary, Stopped

Chassis, Steering

Distinct perception, Increased
operating force

Driving operation,
Driving/stationary, While driving

Chassis, Steering

Fails to operate

Driving operation,
Driving/stationary, While driving

Chassis, Steering

Fails to operate, Power steering

Engine operation

Chassis, Steering

Noise

Driving operation,
Driving/stationary, Stopped

Chassis, Steering

Noise

Driving operation,
Driving/stationary, While driving

Chassis, Steering

Operates incorrectly

Driving operation,
Driving/stationary, Stopped

Chassis, Steering

Operates incorrectly

Driving operation,
Driving/stationary, While driving

Chassis, Steering

Visual

Driving operation,
Driving/stationary, Stopped

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Chassis, Steering

Visual

Driving operation,
Driving/stationary, While driving

Defect

Main group
32 Steering

Subgroup
41 Pump and oil supply

Location
01 Vane/tandem pump/electric pump

Defect code
3241011500

Defect description
Vane/tandem pump/electric pump permanent malfunction

Module
30

Area
Chassis and Suspension

Fault code

Progman / DIS

System State

Version

© 2002-2007 Copyright BMW AG. All rights reserved.

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