A/C - Howling Rough Running Noise With Compressor ON
SI B64 10 10
Heating and Air Conditioning
June 2011
Technical Service
This Service Information bulletin supersedes SI B64 10 10 dated December 2010.
[NEW] designates changes to this revision
SUBJECT
[NEW] Howling/Rough Running Noise when the A/C Compressor is Engaged
MODEL
E82, E88 (1 Series)
E90, E91, E92, E93 (3 Series)
[NEW] E89 (Z4)
[NEW] 1 Series and 3 Series vehicles equipped with the N51 and N52 engine produced from 8/31/08
[NEW] Z4 vehicles produced from 2/28/09
SITUATION
When the air conditioning system is on and the A/C compressor is activated, a howling noise may be heard between 800 and 2,400 rpm.
CAUSE
Vibration in the air condition suction line (low side)
PROCEDURE
See attachment
2010 BMW 128i Convertible (E88) L6-3.0L (N51) Page 151
PARTS INFORMATION
[NEW] WARRANTY INFORMATION
ATTACHMENTS
2010 BMW 128i Convertible (E88) L6-3.0L (N51) Page 152
2010 BMW 128i Convertible (E88) L6-3.0L (N51) Page 153
B641010 - Procedure 1 and 3 Series
2010 BMW 128i Convertible (E88) L6-3.0L (N51) Page 154
B641010 - Procedure Z4
