BMW 335D 2009–2011 — technical service bulletin
Bulletin BMWAPR1314 · NHTSA communication 10148290 · issued Apr 1, 2014
Technical service bulletin
communication type
Engine and Engine Cooling
component
2009–2011
model years
3
vehicle entries
Official summary
"Diesel Intake Carbon Cleaning. The Service Engine Soon light is on and the engine may run roughly. Possible Fault Codes stored: * 3FF1 air mass sensor * 4595 rough controller Cylinder 6 * 459B rough controller Cylinder 5 * 4592 rough controller Cylinder 4 * 4596 rough controller Cylinder 3 * 4593 rough controller Cylinder 2 * 459C rough controller Cylinder 1 CAUSE Based on the above stored ""Fault Code"" profile, there is excessive carbon buildup in the intake system."
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.