# Service bulletin 121315

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.

- Type: Service bulletin
- NHTSA id: 10147072
- Published by NHTSA: 2018\-11\-05
- Manufacturer's number: 121315
- Manufacturer's date: 2015\-02\-01
- NHTSA component: ENGINE; ELECTRICAL SYSTEM

## NHTSA's summary

"SUBJECT Service Engine Soon Light \(MIL\) ""On"" with Lean Mixture Faults Stored. The Service Engine Soon light comes on with either or both of the following faults stored in the DME memory: z 118001 \- Mixture control: Fuel\-air mixture too lean z 118101 \- Mixture control 2: Fuel\-air mixture too lean Engine operation and performance are not affected. The DME fuel\-air mixture diagnosis is too sensitive to slight engine manufacturing tolerances."

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2015/MC-10147072-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2015/MC-10147072-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Engine

## Vehicles listed

- 2015 to 2016 BMW M3
- 2015 to 2016 BMW M4

## Other bulletins for the same vehicles and component

- [B611305](/bulletins/10249027.md), 2024-02-01, Service bulletin: ELECTRICAL SYSTEM. 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.
- [B651523](/bulletins/10238090.md), 2023-06-26, Service bulletin: ELECTRICAL SYSTEM. After programming the head unit \(HU\-H2\), activating the FSC \(German word Freischaltcode\) Enabling Codes repeatedly fails.
- [B840822](/bulletins/10235205.md), 2023-05-01, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM. The 3G network in the US has been shut down. This means that only the 4G network will be available. In the 4G network, voice calls will be transferred via the Voice over LTE \(VoLTE\) function. For this purpose, the SIM card must perform an IMS registration in the mobile communication network. Due to a production error, the telematics control units were delivered without an IMS configuration. The Connected Drive voice services \(Concierge Call, BMW Assistance, and emergency call voice\) can no longer be used regionally in the US in vehicle with telematics control units ATM\-1 and TCB\-4G. Voice control of the vehicle and all other telephone \(paired mobile devices\) functions are not affected. Emergency call location data is unaffected.
- [B630917](/bulletins/10235202.md), 2023-05-01, Service bulletin: EXTERIOR LIGHTING; ELECTRICAL SYSTEM. Exterior rear lights do not work.
- [SIB662419](/bulletins/10218384.md), 2022-08-22, Service bulletin: ELECTRICAL SYSTEM; EQUIPMENT. Vehicle cannot be opened or closed using comfort access, engine start is not possible, and the vehicle may not start when placing the key against the steering column. Note: Opening, closing and starting via the BMW Digital Key or the Digital Key Card are not affected.
- [TEC26](/bulletins/10216793.md), 2022-08-01, Service bulletin: ENGINE AND ENGINE COOLING. TEC26 Turbo Charger Return
- [TEC25](/bulletins/10216792.md), 2022-08-01, Service bulletin: ELECTRICAL SYSTEM. Tec25 Wishbone Return
- [SIM110115](/bulletins/10216758.md), 2022-08-01, Service bulletin: ENGINE AND ENGINE COOLING. MINI engine oil part number transition and model year 2016 engine oils
- [SIB651312](/bulletins/10214990.md), 2022-07-05, Service bulletin: ELECTRICAL SYSTEM. The Headunit High \(HU\-H\), also called NBT, began replacing the Car Information Computer \(CIC\) on certain MY2013 vehicles with option 609 \(as of 7/2012 production\). This uses map North America NEXT. The Headunit High 2 \(HU\-H2\), also called NBT\-EVO, superseded the NBT HU and was introduced in 3/2014. This uses map North America EVO. The Headunit High 4 \(HU\-H4, also called MGU21\) superseded the MGU starting with certain MY2021 vehicles with option code 6U3 Live Cockpit Professional. This uses map North America JOY. The ENTRY Media/Navigation \(HU\-B\) is the low line business version of the navigation system and was introduced in 3/2014. This uses map North America ROUTE. The ENTRY NAV EVO \(HU\-B2\) replaced Entry Media/Navigation as the low\-line business version and was introduced in certain MY2018 vehicles. This uses map North America WAY.
- [B840221](/bulletins/10200249.md), 2021-08-09, Service bulletin: EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; COMMUNICATION:MANUFACTURER TELEMATICS; ELECTRICAL SYSTEM:SOFTWARE. The discontinuation of 3G cellular communication for Combox, TCB 3G and ATM 3G \(Telematics ControlModule\) can no longer be supported by the cellular network provider starting February 2022. The decision to phase out 3G network technology was made at the discretion of the respective cellular carriers and lies beyond the control of BMW. Due to the phase\-out, BMW Assist and ConnectedDrive services will no longer be supported after this date.

JSON: [/v1/bulletins/10147072](/v1/bulletins/10147072)

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