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Service bulletin B640621

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10204657
Published by NHTSA2021-12-13
Manufacturer's numberB640621
Manufacturer's date2021-09-01
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL

NHTSA's summary

Different air temperatures are felt from left to right out of the front fresh air grilles (air vents).

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
BMW 228I2020, 2021
BMW I32014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
BMW M235I2020, 2021
BMW X12016, 2017, 2018, 2019, 2020, 2021
BMW X1 SAV2016 to 2017
BMW X22018, 2019, 2020, 2021

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20184972018-09-13. Engine
18V4650002018-07-11. ENGINE AND ENGINE COOLING:ENGINE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
B0102242026-08-03. Warranty extension. 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.
B0105252026-05-18. Warranty extension. 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.
B0102242026-05-18. Warranty extension. 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.
B0102252025-05-27. Warranty extension. The engines turbocharger wastegate valve controller limited warranty for defects in materials and / or workmanship has been extended to 15 years / 150,000 miles as determined from the original in-service date.
B0625252025-04-04. Other. Bearing Shell Return
B0104192024-09-29. Warranty extension. 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, from the original 10 years/120,000 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. Vehicles that are registered in California or a State that has fully adopted the State of California PZEV(SULEV) emission regulation (State of registration, model, and model year dependent), the emission-relevant coverage for this component is 15 years/150,000 miles.
B0102242024-05-31. Warranty extension. EVAP SYSTEM PURGE (VENT) VALVE EXT LTD WTY (ELW) 15/150
B0105242024-05-03. Service bulletin. For this vehicle, 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 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. Vehicles that are registered in California or a State that has fully adopted the State of California PZEV(SULEV) / TZEV emission regulations (As applicable, State of registration, model, and model year dependent), the emission-relevant coverage for this component is 15 years / 150,000 miles.
B1606232024-01-03. Service bulletin. Engine will crank but not start. There is no communication with the integrated fuel module (TFE) whendiagnosing with ISTA. The following two fault codes will be stored in the DME: 032B43 - Low fuel pressure system, electric fuel pump: pressure value too low CDA594 - Message (- 0x33E) missing, receiver DME, transmitter TFE
B1207232023-12-06. Service bulletin. Vehicle exhibits a slight acceleration delay when taking off from a MSA (automatic engine start-stopfunction) stop.