# Service bulletin B120120

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: 10171481
- Published by NHTSA: 2020\-02\-18
- Manufacturer's number: B120120
- Manufacturer's date: 2020\-01\-01
- NHTSA component: ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER

## NHTSA's summary

FAULTS FOR TURBOCHARGER ELECTRIC WASTEGATE STORED IN THE DME. The engine malfunction warning \(MIL\) is illuminated and one of the following fault codes is stored in the DME. 123518 \- electrical wastegate valve 2 wastegate valve: stiff movement And/or 120408 \- charging pressure control: Switch\-off as a secondary reaction CAUSE The DME has an adaptation error when calculating the setpoint values of the two electric wastegates.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10171481-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10171481-9999.pdf)

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

## Components

Engine, Turbocharger or supercharger

## Vehicles listed

- 2020 BMW X3
- 2020 BMW X4

JSON: [/v1/bulletins/10171481](/v1/bulletins/10171481)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20B120120&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10171481&vehicle=Service%20bulletin%20B120120)