# Service bulletin B000421

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: 10205598
- Published by NHTSA: 2021\-12\-27
- Manufacturer's number: B000421
- Manufacturer's date: 2021\-11\-01
- NHTSA component: EQUIPMENT; ENGINE

## NHTSA's summary

An increased number of vehicles are experiencing various drivability complaints, premature component failures, and increased diagnostic times that may be caused by vehicle modifications or aftermarket tuning kits.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10205598-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10205598-9999.pdf)

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

## Components

Engine, Equipment and accessories

## Vehicles listed

- BMW BMW

JSON: [/v1/bulletins/10205598](/v1/bulletins/10205598)

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