# Service bulletin B170121 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: 10214256 - Published by NHTSA: 2022\-06\-21 - Manufacturer's number: B170121 - Manufacturer's date: 2022\-02\-01 - NHTSA component: ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE ## NHTSA's summary The quick disconnect coupling on the cylinder head coolant vent line could break at the cylinder head. This would lead to loss of coolant from the engine. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10214256-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10214256-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Engine, Fuel system ## Vehicles listed - 2014 to 2016 BMW 228I - 2017 to 2021 BMW 230I - 2013 to 2018 BMW 320I - 2014 to 2018 BMW 328D - 2012 to 2016 BMW 328I - 2016 to 2018 BMW 330E - 2017 to 2020 BMW 330I - 2012 to 2017 BMW 335I - 2016 to 2019 BMW 340I - 2020 BMW 340I - 2014 to 2016 BMW 428I - 2017 to 2020 BMW 430I - 2014 to 2016 BMW 435I - 2017 to 2020 BMW 440I - 2017 BMW 5\-SERIES GRAN TURISMO - 2017 BMW 530E - 2018 BMW 530E - 2017 to 2018 BMW 530I - 2017 BMW 535I - 2018 BMW 540D - 2017 to 2018 BMW 540I - 2017 BMW 550I - 2017 to 2018 BMW 640I - 2017 to 2018 BMW 650I - 2017 to 2018 BMW 740E - 2017 to 2018 BMW 740I - 2017 to 2018 BMW 740LE - 2017 to 2018 BMW 740LI - 2017 BMW 750I - 2018 BMW 750I - 2017 to 2018 BMW 750LI - 2017 BMW 750LXI - 2017 BMW 750XI - 2018 BMW 8 SERIES - 2013 BMW ACTIVE HYBRID 3 - 2014 to 2015 BMW ACTIVE HYBRID 3 - 2018 BMW B7 ALPINA - 2017 to 2018 BMW I3 - 2017 BMW I8 - 2018 BMW I8 - 2017 to 2018 BMW M2 - 2014 to 2016 BMW M235I - 2017 BMW M235I - 2017 to 2021 BMW M240I - 2017 to 2018 BMW M3 - 2017 to 2018 BMW M4 - 2018 BMW M5 - 2017 BMW M550I - 2018 BMW M550I - 2017 to 2018 BMW M6 - 2017 to 2018 BMW M760I - 2017 to 2018 BMW M760LI - 2018 BMW M850I - 2017 to 2018 BMW X1 - 2017 BMW X1 SAV - 2018 BMW X2 - 2017 to 2018 BMW X3 - 2017 to 2018 BMW X4 - 2017 to 2018 BMW X5 - 2018 BMW X5 M - 2017 to 2018 BMW X6 - 2017 to 2018 BMW X6 M ## Recalls for the same vehicles and component - [2025560](/recalls/tc/2025560.md), 2025-10-15: Engine - [25V700000](/recalls/nhtsa/25V700000.md), 2025-10-15: FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM - [2025514](/recalls/tc/2025514.md), 2025-09-25: Engine - [2024468](/recalls/tc/2024468.md), 2024-08-13: Engine - [24V608000](/recalls/nhtsa/24V608000.md), 2024-08-13: ELECTRICAL SYSTEM:WIRING:CONNECTORS/PLUGS/RECEPTACLES; ENGINE AND ENGINE COOLING:COOLING SYSTEM:PUMP - [23V707000](/recalls/nhtsa/23V707000.md), 2023-10-20: ENGINE AND ENGINE COOLING:ENGINE - [2022095](/recalls/tc/2022095.md), 2022-03-02: Engine - [22V119000](/recalls/nhtsa/22V119000.md), 2022-03-02: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE \(PCV\) - [2021711](/recalls/tc/2021711.md), 2021-11-19: Engine - [21V907000](/recalls/nhtsa/21V907000.md), 2021-11-19: FUEL SYSTEM, DIESEL ## Other bulletins for the same vehicles and component - [b011125](/bulletins/11037504.md), 2026-09-28, Warranty extension: ENGINE. The Exhaust Gas Recirculation \(EGR\) Cooler \(with EGR Valve\) and the Auxiliary Exhaust Gas Recirculation \(EGR\) Cooler limited warranty for defects in materials and / or workmanship has been extended to 25 years without mileage limit as determined from the original first in\-service / delivery date. - [B010921](/bulletins/11035498.md), 2026-08-03, Warranty extension: ENGINE. The NVLD limited emissionrelated warranty for defects in materials or workmanship has been extended to 15 years/150,000 miles as determined from the original in\-service date. - [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. - [B010525](/bulletins/11032732.md), 2026-05-18, 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. - [B010224](/bulletins/11032730.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. - [B062626](/bulletins/11031897.md), 2026-05-01, Other: ENGINE. Inlet Hose Return - [B061626](/bulletins/11029016.md), 2026-02-25, Other: ENGINE. Double Pipe Return - [B010122](/bulletins/11028000.md), 2026-02-02, Service bulletin: ENGINE. N63TU1 CLASS ACTION SETTLEMENT SVC CAMPAIGN: OIL CONSUMPTION DIAGNOSIS/REPAIR - [B011724](/bulletins/11024203.md), 2025-10-09, Warranty extension: ENGINE. The Fuel Injector Condition\-Specific Repair Coverage Program applies to qualifying repairs for the required replacement of one or more the fuel injectors which were determined to have failed due to a buildup of external corrosion in the engine’s center fuel injector bore area that resulted after this location was periodically contaminated by engine coolant residue over time. This special program’s coverage is 15 years / 150,000 miles as determined from the vehicle's original in\-service / first delivery date. JSON: [/v1/bulletins/10214256](/v1/bulletins/10214256) [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%20B170121&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10214256&vehicle=Service%20bulletin%20B170121)