Service bulletin B510321

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)
Type	Service bulletin
NHTSA id	10188940
Published by NHTSA	2021-03-15
Manufacturer's number	B510321
Manufacturer's date	2021-02-01
NHTSA component	VISIBILITY; STRUCTURE

NHTSA's summary

TICKING NOISE FROM A-PILLAR AREA: A ticking noise is present in the A-Pillar and side mirror area when driving at speeds of approximately 40 MPH.

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

Body and frame, Glass, wipers and mirrors

Vehicles listed
BMW 330E	2021
BMW 330I	2019, 2020, 2021
BMW M340I	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
2021078	2021-02-18. Visual System
19V755000	2019-10-23. STRUCTURE:BODY:TRUNK LID
2019480	2019-10-01. Visual System

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
B010325	2026-03-13. Warranty extension. The Radiator Grilles Lower Active Air Flap Assembly 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.
B410725	2025-08-24. Service bulletin. While driving on a smooth and/or uneven road, a “cracking” sound is heard from the rear wheel arch area (highlighted in orange) on either the right or left side.
B511223	2025-07-28. Warranty extension. After carrying out the vehicle test, one or more of the stored faults indicate that the operation of the front bottom active air flap is obstructed or blocked.
B010825	2025-05-31. Warranty extension. A vehicle listed above may arrive with a Check Control Message (CCM), and/or malfunction indicator lamp(MIL) illuminated. After carrying out the vehicle test, one or more of the stored faults indicate that the operation of the front bottomactive air flap is obstructed or blocked. Thoroughly inspect the front bottom air flap, when applicable, remove any contamination that is found caught inand between the bottom air flaps (aka “blinds”) and/or the housing.
B513019	2025-05-02. Service bulletin. A groaning noise is present from the door frame of any door, most commonly when driving over rough roadsor during body flex. This situation may be worse in vehicles which are regularly waxed in th e area of the door jamb.
B010325	2025-04-18. Warranty extension. The Radiator Grilles Lower Active Air Flap Assembly 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.
B010725	2025-04-18. Warranty extension. The Radiator Grilles Lower Active Air Flap Assembly 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.
B640422	2024-03-02. Service bulletin. An interference noise (groaning noise) can be heard from within the heating and air-conditioning unit in thecenter of the instrument panel. The groaning noise always occurs when either a ventilation flap, air stratification flap or the recirculated airflap moves to a different position. Due to the complex design of the heating and air-conditioning unit, the kinematics causing it (top or bottom,left or right) may not be able to be precisely located. Depending on the vehicle model, the number of servomotors (and the associated kinematics unit) varies.Various models use either 2 or 3 servomotors.
B510819	2024-02-01. Service bulletin. The basic conditions for initializing the power windows are not met.
B513019	2023-10-01. Service bulletin. A groaning noise is present from the door frame of any door, most commonly when driving over rough roadsor during body flex. This situation may be worse in vehicles which are regularly waxed in the area of the door jamb. Note: This service information bulletin contains diagnostic and repair information which was previouslyincluded in an NED test plan that has been removed.