2021 BMW 330i AC Rattling Noise TSB
Owners of 2021 BMW 330i, M340i, and 330e vehicles may notice a rattling noise inside the cabin when the air conditioning system is activated. This manufacturer communication, identified by NHTSA ID 10200245, addresses this specific concern.
Also applies to
- BMW 330e
- 2021
- BMW M340i
- 2021
Owners of the 2021 BMW 330i, M340i, and 330e models may experience a persistent 2021 BMW 330i AC rattling noise when the air conditioning system is active. This issue is detailed in a manufacturer communication, NHTSA ID 10200245, which aims to provide guidance for technicians to diagnose and resolve the concern.
Symptoms
The primary symptom addressed by this manufacturer communication is a 2021 BMW 330i AC rattling noise heard inside the vehicle cabin. The specific verbatim description of the fault is: "A rattling noise is heard in the vehicle interior when the air conditioning is activated."
Diagnosis and Trigger Conditions
This rattling noise specifically occurs when the air conditioning system is activated. Technicians should focus their diagnosis on components related to the HVAC system, including refrigerant hoses and fittings, and other parts of the air conditioner assembly. The issue is linked to the vehicle's visibility, defroster/defogger/HVAC system, and engine and engine cooling components.
Repair Procedure Summary
While the specific repair steps are not detailed in the summary provided, the manufacturer communication (NHTSA ID 10200245) indicates that BMW has acknowledged this 2021 BMW 330i AC rattling noise and is providing guidance to dealerships. The resolution will likely involve inspecting and potentially replacing or securing components within the air conditioning and HVAC system to eliminate the rattling.
Owner Action
If you own a 2021 BMW 330i, M340i, or 330e and are experiencing a rattling noise when your air conditioning is activated, it is recommended to schedule an appointment with an authorized BMW dealership. Inform them about the specific symptom and mention that you are aware of manufacturer communication NHTSA ID 10200245. The dealership will be able to diagnose the exact cause of the rattling and perform the necessary repairs.
Source: NHTSA ID 10200245
What BMW 330i owners report
Counted from the records in our database across 16 model years.
- 818
- Owner complaints
- 39
- Recalls
- 863
- Service bulletins
- 30
- Crashes reported
- 38
- Fires reported
- 36
- Injuries reported
The 2021 model year
29 complaints, the 10th most of 16 model years on file. Owners reported 1 crash, 3 fires and 1 injury for this year, which also has 7 recalls on file.
Engine And Engine Cooling and Visibility and Equipment, the system this article covers, accounts for 64 of 818 complaints (8%), including 1 for 2021.
Complaints by model year
| 2001 | 116 | |
|---|---|---|
| 2002 | 45 | |
| 2003 | 77 | |
| 2004 | 113 | |
| 2006 | 219 | |
| 2017 | 42 | |
| 2018 | 32 | |
| 2019 | 41 | |
| 2020 | 53 | |
| 2021 | 29 |
Most-reported systems
- Air Bags — 246
- Exterior Lighting — 153
- Electrical System — 132
- Engine — 89
- Power Train — 44
Latest recalls for the 2021 model year
- 26V056000 — Electrical System (Jan 2026)
- 25V636000 — Electrical System (Sep 2025) — Park outside
- 23V584000 — Electrical System (Aug 2023)
Recent owner reports about engine and engine cooling and visibility and equipment
The contact owns a 2021 BMW 330I. The contact stated while driving 50 MPH and coming to a stop at a red traffic light, the contact started smelling smoke. There was no warning light illuminated.
Read owner complaints →While I was driving down the highway, sunroof has exploded without any apparent reason. I really didn’t realize what had happened at first, all I heard was a loud bang which could’ve lead to distraction and cause an accident.
Complaints are owner reports filed with NHTSA. They are unverified, and counts depend on how many vehicles were sold, so they are not a failure rate.
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