Technical Service Bulletin 640111 — 2010 BMW 535I GRAN TURISMO
VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
Bulletin Details
| TSB ID | 640111 |
| Manufacturer | |
| Vehicle | 2010 BMW 535I GRAN TURISMO |
| Component | VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM |
| Communication Date |
Bulletin Summary
"Whistling Noise Heard from the Center Fresh-Air Vent During Heating. A whistling noise is heard from the center fresh-air vents. The noise can be heard during the warm up phase (3 to 10 mins) after the heating system is first activated, with low outside temperatures and the center vents stratification adjustment wheel is turned to the ""red"" position. Note: This is independent of the air distribution setting, but a lower fan speed is required. CAUSE Unfavorable air flow against the mixing flaps in the upper distribution housing"
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.