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Service bulletins for the 2011 BMW 135i

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

113 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
B1102082020-05-18. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. Power Reduction FC2A82 Intake VANOS and/or FC2 A87 Exhaust VANOS Camshaft Fault: The "Service Engine Soon" (MIL) lamp is illuminated and engine power reduction is perceived. This situation can occur after driving for some time with the engine at full operating temperature. If the ignition is cycled the engine then usually performs normally.
1217132018-12-03. Service bulletin. ENGINE; POWER TRAIN. N55: Engine Difficult to Start at Cold Ambient Temperatures. The complaint may include any of the following symptoms: * The engine stalls immediately after a cold start before driving away * The engine may run roughly or misfire after a cold start * The engine does not start cold or may take several attempts * To assist starting when cold, the accelerator may need to be depressed slightly and the idle speed raised for a few seconds so the engine does not stall This can occur most frequently at outside ambient temperatures between -15°C and + 15°C. It is possible that the Service Engine Soon (MIL) lamp is on with misfire fault(s) stored, but it is equally possible that there will be no faults stored in the DME. Unfavorable DME software Cold start or idling problems may arise due to poor fuel quality. The use of summer fuel during cold outside temperatures may also lead to such problems.
1216112018-12-03. Service bulletin. ENGINE; POWER TRAIN. N55 Engine Failsafe - FC 120308 Boost Pressure Control, Plausibility: Pressure Too Low Stored in DME Fault Memory. INFORMATION The customer complains the SES is illuminated and the engine has reduced power (engine failsafe mode).
2801142018-11-26. Service bulletin. POWER TRAIN. DCT Transmission: Oil Leakage Diagnosis. INFORMATION Incorrect diagnosis of DCT (Double-clutch Transmission) oil leaks may lead to unnecessary part replacements and repeat customer repair visits. When diagnosing complaints related to DCT fluid leaks, please use the attached diagnostic procedure. WARRANTY INFORMATION Not applicable. ATTACHMENTS View PDF attachment B280114_DCT_Oil_Leak_Diagnosis. [ Copyright (c)2014 BMW of North America, Inc. ] https://www.bmwtis.net/tiscode/cgi-bin/bulletin.aspx?sie_path=/tsb/bulletins/htm_store/16672.2.B28011... 12/24/2014
1215142018-11-13. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ELECTRICAL SYSTEM:SOFTWARE; ENGINE. N55 with Double-Clutch Transmission: Idle Fluctuates when Stopped. A customer may complain that after coming to a stop, the engine speed intermittently fluctuates from about 500 RPM to 1,100 RPM. This situation can be more noticeable when the air conditioner is on. Unfavorable DME software.
6117142018-11-13. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. "Intelligent Battery Sensor Diagnosis Hints. The vehicle enters the workshop with one or more of the following complaints: * Check Control Message related to battery discharge * No-start condition * Consumer power reduction (reduced blower speed, heated seats operation, etc.) * The following fault codes may be stored in the DME a. 2E8B - Intelligent battery sensor, signal b. 2E8C - Intelligent battery sensor, function c. 2E8D - Intelligent battery sensor, signal transmission d. 2E8E - Intelligent battery sensor, communication CAUSE A faulty battery or IBS sensor (not both) The power management system and IBS in the vehicle cannot determine if the battery needs to be replaced. This is normal operation for all E-Series vehicles because they do not have the Advanced IBS sensor that the F-Series vehicles do. An external battery tester (Midtronics EXP-1000) must be used to determine if the battery needs to be replaced. Energy Diagnosis will not prompt for a battery replacement unless the battery is ""aged."" When energy diagnosis identifies the battery as ""aged,"" it means the amount of energy discharge over the course of the life of the battery has reached its maximum (worn out). In most cases, energy diagnosis states that the battery is OK. This is typically an indication of the current State of Charge (SoC), not the State of Health (SoH). The SoC is defined as the current amount of energy left in the battery (displayed as a percentage). The SoH is defined as an evaluation of the condition of the battery over a period of time (displayed as a percentage). For more information about batteries, refer to Training Manual ST051, ""07 Battery Basics."""
2404132018-11-13. Service bulletin. POWER TRAIN. GM6 - 6L45R: Diagnostic Procedure for Shudder or Vibration Issues. A shudder or vibration can be felt under light acceleration or when driving at constant suburban speeds. This can be most noticeable in the 1700 - 2200 engine rpm range while in 3rd through 6th gears. No faults are stored in the EGS module. CAUSE Changes in the frictional properties of the automatic transmission fluid over time can lead to momentary slipping of the torque convertor lock-up clutch.
B1215142018-11-05. Service bulletin. POWER TRAIN; ENGINE. This Service Information bulletin supersedes SI B12 15 14 dated August 2014. designates changes to this revision SUBJECT N55 with Double-Clutch Transmission: Idle Fluctuates when Stopped. A customer may complain that after coming to a stop, the engine speed intermittently fluctuates from about 500 RPM to 1,100 RPM. This situation can be more noticeable when the air conditioner is on. CAUSE DME software (idle control adaptation).

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.