# Service bulletin B640321

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: 10200243
- Published by NHTSA: 2021\-08\-09
- Manufacturer's number: B640321
- Manufacturer's date: 2021\-06\-01
- NHTSA component: EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; STRUCTURE:INTERIOR PANELS:DASHBOARD

## NHTSA's summary

After replacing the microfilter during a previous service, the customer notices that the ventilation system airflow rate is noticeably less. This leads to perceived lower cooling power. The customer may also notice that external odors enter the vehicle.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10200243-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10200243-9999.pdf)

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

## Components

Body and frame, Equipment and accessories

## Vehicles listed

- 2021 BMW 330E
- 2019 to 2021 BMW 330I
- 2020 to 2021 BMW M340I
- 2018 to 2021 BMW X3
- 2019 to 2021 BMW X4

## Recalls for the same vehicles and component

- [2024609](/recalls/tc/2024609.md), 2024-10-15: Structure
- [24V764000](/recalls/nhtsa/24V764000.md), 2024-10-15: STRUCTURE
- [2024410](/recalls/tc/2024410.md), 2024-07-17: Structure
- [24V534000](/recalls/nhtsa/24V534000.md), 2024-07-17: STRUCTURE
- [19V755000](/recalls/nhtsa/19V755000.md), 2019-10-23: STRUCTURE:BODY:TRUNK LID
- [2018117](/recalls/tc/2018117.md), 2018-03-07: Structure
- [18V154000](/recalls/nhtsa/18V154000.md), 2018-03-07: STRUCTURE:BODY

## Other bulletins for the same vehicles and component

- [B010226DCS](/bulletins/11036453.md), 2026-08-28, Other: STRUCTURE:BODY. BMW Notice of the Court’s Final Approval for Shark\-Fin Antenna Settlement \(X3, X4, X5, X6, X7\)
- [B010226](/bulletins/11036388.md), 2026-08-27, Service bulletin: STRUCTURE:BODY. Rear Roof Antenna Shark Fin Cover Sealing Issue
- [B010226](/bulletins/11033030.md), 2026-06-01, Warranty extension: STRUCTURE:BODY. SHARK FIN ROOF ANTENNA SEALING SETTLEMENT Extended Warranty
- [B010325](/bulletins/11030060.md), 2026-03-13, Warranty extension: STRUCTURE:BODY. 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](/bulletins/11022101.md), 2025-08-24, Service bulletin: STRUCTURE:BODY. 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](/bulletins/11020911.md), 2025-07-28, Warranty extension: STRUCTURE:BODY. 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](/bulletins/11018730.md), 2025-05-31, Warranty extension: STRUCTURE:BODY. 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](/bulletins/11017506.md), 2025-05-02, Service bulletin: STRUCTURE:BODY. 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](/bulletins/11017103.md), 2025-04-18, Warranty extension: STRUCTURE:BODY. 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](/bulletins/11017102.md), 2025-04-18, Warranty extension: STRUCTURE:BODY. 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.

JSON: [/v1/bulletins/10200243](/v1/bulletins/10200243)

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