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Service bulletin B120220

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10171482
Published by NHTSA2020-02-18
Manufacturer's numberB120220
Manufacturer's date2020-01-01
NHTSA componentENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM

NHTSA's summary

THE MIL IS ILLUMINATED WITH OXYGEN SENSOR FAULTS STORED: One of the following faults may be stored in the digital motor electronics (DME) either as part of diagnosing a different issue; and/or an illuminated malfunction indicator lamp (MIL). Fault code Control module Fault code text 13900 DME Oxygen sensor after catalytic converter from rich to lean: Delayed response Or: 12B011 DME Oxygen sensor 2 after of catalytic converter from rich to lean: Delayed response This situation is not associated with any drivability complaints. An unfavorable DME diagnostic calibration may cause a fault code to be erroneously stored. These faults will cause the MIL to illuminate.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Engine

Vehicles listed
BMW M52018, 2019, 2020

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
19V8830002019-12-11. ELECTRICAL SYSTEM:WIRING; POWER TRAIN:AUTOMATIC TRANSMISSION
19V5130002019-07-03. ENGINE; FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP
18V3230002018-05-16. ELECTRICAL SYSTEM:SOFTWARE; FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
B0117242025-10-09. Warranty extension. The Fuel Injector Condition-Specific Repair Coverage Program applies to qualifying repairs for the required replacement of one or more the fuel injectors which were determined to have failed due to a buildup of external corrosion in the engine’s center fuel injector bore area that resulted after this location was periodically contaminated by engine coolant residue over time. This special program’s coverage is 15 years / 150,000 miles as determined from the vehicle's original in-service / first delivery date.
B0635252025-07-02. Other. Engine Return
B7204172025-04-18. Warranty extension. The Supplemental Restraint Systems (SRS) Front Passenger’s Seat Occupancy Capacitive Interior Sensor (CIS) Mat for defects in materials and/or workmanship that causes a false seat occupancy alert to occur has been extended to 10 years / 120,000 miles as determined from the vehicle's original inservice / first delivery date.
B0108212024-12-31. Warranty extension. The NVLD limited emission related warranty for defects in materials or workmanship has been extended to 15 years/150,000 miles as determined from the original in-service date
B1703242024-07-01. Service campaign. Under certain driving situations, coolant leaks onto the fuel injectors on cylinder bank (5-8).
B1703242024-05-29. Service campaign. Under certain driving situations, coolant leaks onto the fuel injectors on cylinder bank (5-8).
B1703242024-05-03. Service bulletin. BMW AG has issued a Delivery Stop (effective April 15, 2024) on certain Model Year 2018 - 2023 BMW vehicles that were produced between November 7, 2017, and September 9, 2022.
B5108192024-02-01. Service bulletin. The basic conditions for initializing the power windows are not met.
B6105242024-02-01. Service bulletin. The Central Information Display goes black intermittently due to resets of the Head Unit (HU-H3). FaultB7F8F9 â“ âHU-H: Resetâ will be stored in the HU-H3.
B6113052024-02-01. Service bulletin. The electrical system of BMW vehicles has been subject to an ongoing development process over the last few years. This has led to increased demands being placed on the battery. This document covers important information for the dealer on how to handle “discharged battery” complaints.