# Service bulletin B340320

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: 10177623
- Published by NHTSA: 2020\-07\-27
- Manufacturer's number: B340320
- Manufacturer's date: 2020\-06\-01
- NHTSA component: ENGINE AND ENGINE COOLING; SERVICE BRAKES, HYDRAULIC

## NHTSA's summary

PREMATURE WEAR OF THE REAR AXLE BRAKE PADS WITH STANDARD BRAKES: The CBS data and Check Control \(CC\) message shows the rear axle brake pads are worn, and the vehicle has less than 15,500 miles. Increased residual braking forces in the rear axle brake calipers caused by production\-related deviations on the surface of the piston ring seal.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10177623-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10177623-9999.pdf)

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

## Components

Brakes, Engine

## Vehicles listed

- 2021 BMW 330E
- 2019 to 2020 BMW 330I
- 2020 BMW M340I
- 2019 to 2020 BMW Z4

## Recalls for the same vehicles and component

- [2026040](/recalls/tc/2026040.md), 2026-01-30: Engine
- [2025514](/recalls/tc/2025514.md), 2025-09-25: Engine
- [24V576000](/recalls/nhtsa/24V576000.md), 2024-08-01: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE; ELECTRICAL SYSTEM:STARTER ASSEMBLY
- [2021479](/recalls/tc/2021479.md), 2021-08-03: Brakes
- [21V598000](/recalls/nhtsa/21V598000.md), 2021-08-02: ENGINE
- [2021061](/recalls/tc/2021061.md), 2021-02-10: Brakes
- [19V732000](/recalls/nhtsa/19V732000.md), 2019-10-15: ENGINE

## Other bulletins for the same vehicles and component

- [B010224](/bulletins/11035496.md), 2026-08-03, Warranty extension: ENGINE. The EVAP systems purge \(vent\) valve limited warranty for defects in materials and / or workmanship has been extended to 15 years / 150,000 miles as determined from the original first in\-service / delivery date.
- [B010324](/bulletins/11032731.md), 2026-05-18, Warranty extension: ENGINE. The EVAP systems purge \(vent\) valve limited warranty for defects in materials or workmanship has been extended to 15 years / 150,000 miles as determined from the original in\-service date.
- [B063025](/bulletins/11017562.md), 2025-05-02, Other: ENGINE. Coolant Pump Return
- [B062525](/bulletins/11016470.md), 2025-04-04, Other: ENGINE. Bearing Shell Return
- [B010324](/bulletins/11008101.md), 2024-09-29, Warranty extension: ENGINE. For this vehicle, the EVAP systems purge \(vent\) valve limited warranty for defects in materials or workmanship has been extended to 15 years / 150,000 miles as determined from the original in\-service date. This coverage is subject to the same vehicle eligibility requirements, limitations, and exclusion criteria that apply to the BMW New Vehicle Limited Warranty.
- [B010324](/bulletins/11000579.md), 2024-05-31, Warranty extension: ENGINE. EVAP SYSTEM PURGE \(VENT\) VALVE EXT LTD WTY \(ELW\) 15/150
- [B120721](/bulletins/10252038.md), 2024-04-01, Service bulletin: ENGINE AND ENGINE COOLING. Check Control message \(CCM\) indicates: \(ID 213\): Stop, exercising due care. Voltage supply The Service Engine Soon light is on with the following DME Fault Code: 21B209 \- Starter alternator / belt for 48V system \(OSA\_RIEMEN\_RISS\): Belt betweenCombustion engine and starter generator torn And/or one or more of the following other issues are also occurring: Noise in the area of the belt drive. Odor from the engine compartment. Smoke formation in the area of the belt drive. Drive belt damaged or prematurely worn. Torn drive belt.
- [B120721](/bulletins/10245367.md), 2023-12-06, Service bulletin: ENGINE AND ENGINE COOLING. Check Control message \(CCM\) indicates: \(ID 213\): Stop, exercising due care. Voltage supply The Service Engine Soon light is on with the following DME Fault Code: 21B209 \- Starter alternator / belt for 48V system \(OSA\_RIEMEN\_RISS\): Belt betweenCombustion engine and starter generator torn And/or one or more of the following other issues are also occurring: Noise in the area of the belt drive. Odor from the engine compartment. Smoke formation in the area of the belt drive. Drive belt damaged or prematurely worn. Torn drive belt.
- [B011423](/bulletins/10245365.md), 2023-12-06, Service bulletin: ENGINE AND ENGINE COOLING. PRESSURE CONTROL VALVE \(PCV\) EXTENDED LTD WTY 15 YEARS/150,000 MILES
- [B340714](/bulletins/10244237.md), 2023-11-01, Service bulletin: SERVICE BRAKES, HYDRAULIC. Functional noises \(squealing/honking\) when braking shortly before the vehicle comes to a stop. CAUSE Material\-

JSON: [/v1/bulletins/10177623](/v1/bulletins/10177623)

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