# Service bulletin MC230121

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: 11014673
- Published by NHTSA: 2025\-03\-03
- Manufacturer's number: MC230121
- Manufacturer's date: 2025\-02\-13
- NHTSA component: POWER TRAIN

## NHTSA's summary

Sealing ring on the differential cover of the reverser is leaking. Radial shaft seal faulty.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11014673-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11014673-9999.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- 2020 to 2021 BMW K 1600 B
- 2020 BMW K 1600 GT
- 2020 to 2021 BMW K 1600 GTL

## Recalls for the same vehicles and component

- [26V214000](/recalls/nhtsa/26V214000.md), 2026-04-02: POWER TRAIN:MANUAL TRANSMISSION:SEALS/GASKETS
- [2019486](/recalls/tc/2019486.md), 2019-10-02: Powertrain
- [19V692000](/recalls/nhtsa/19V692000.md), 2019-10-01: POWER TRAIN:MANUAL TRANSMISSION

JSON: [/v1/bulletins/11014673](/v1/bulletins/11014673)

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