5 Series E39 530d (M57) SAL
VS-21/Löschan
Baugruppe/Group: 11
11 02 00 (605)
weltweit ohne
USA/Kanada
Datum/Date:
10/2000
Reduced brake power assistance after prolonged manoeuvring
E39, E38 / M57
Complaint:
Reduced brake power assistance after prolonged manoeuvring without throttle actuation
("hard brake pedal").
Cause:
Unfavorable tolerance zones between vacuum pump feed capacity and brake booster
servo vacuum requirement when the engine is idling lead to reduced brake power
assistance after repeated brake applications.
Affected
vehicles:
E38/E39 with M57
Manufacturing period:
Automatic vehicles: start of series production until July 2000
Manual vehicles: start of series production until January 2001
Remedy:
In case of customer complaint, retrofit a larger vacuum pump with greater feed capacity.
Procedure:
Remove vacuum pump, please refer to Repair Instructions for E38/E39 11 66 000.
A fastening lug must be installed in order to fit the new vacuum pump. This allows the
existing screw connections to be used. A new moulded hose allows the vacuum line to be
secured to the vacuum pump.
The fastening lug is fixed at the top to the "old" vacuum pump screw connection and at the
bottom to the EGR cooler anchorage on the cylinder head.
The acoustic cover must be replaced with a version modified to fit the shape of the new
vacuum pump.
Fig. 1:
Retrofit solution for vacuum pump on
E38/E39 without EGR cooler and
straight fastening lug, up to 03/2000
SI Reduced brake power assistance after prolonged manoeuvring E39 E38 M57
BMW AG - TIS
20.02.2013 09:24
Issue status (12/2007) Valid only until next DVD is issued
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