2022-2025 BMW i4 A/C Compressor Bracket: Identifying Noises and Part Numbers
This guide clarifies the function, failure symptoms, and replacement of the A/C compressor mounting bracket (part no. 64509893881) for the BMW i4.
- The number on the part (100006199) is a casting number; the correct BMW part number for ordering is 64509893881.
- The most common symptom of a bad bracket is a rattle or buzz from the front of the car, especially when the A/C is on.
- A used OEM bracket is a reliable and cost-effective option, provided it is inspected for cracks and warping before installation.
- Replacement does not require opening the A/C refrigerant system and is feasible for a DIY mechanic.
Part Number Identification
A common point of confusion is the part number. The number physically cast into the bracket is often 100006199. This is a casting number used during manufacturing and is not the orderable part number. The official BMW OEM part number for ordering a replacement is 64509893881. When searching for or purchasing this part, always use the official 64509893881 number to ensure you receive the correct component for your 2022-2025 BMW i4.
Symptoms of a Failing A/C Bracket
Because the 2022-2025 BMW i4 is a relatively new model, outright failure of this bracket is uncommon. However, damage can occur from road debris, bottoming out the vehicle, or from stress if other components are loose. The most common symptom of a bad or loose A/C compressor bracket is noise.
- Rattling or Buzzing Noises: A distinct rattle, buzz, or metallic vibration coming from the front of the vehicle, especially when the air conditioning is turned on. 🎬 Watch: Diagnose common car A/C compressor noises and their causes This noise may change or disappear when the A/C is switched off.
- Groaning or Humming: A groaning noise from the center of the instrument panel area could be related to the A/C system's operation, and while often linked to ventilation flaps, a compromised bracket could contribute to harmonic vibrations.
- Visible Damage: In cases of impact, a visual inspection may reveal cracks (especially around the bolt holes), bending, or other obvious damage to the bracket.
Known Issues, TSBs, and Recalls
As of mid-2026, there are no specific recalls or Technical Service Bulletins (TSBs) issued by BMW or the NHTSA for the A/C compressor bracket itself (part no. 64509893881).
However, owners should be aware of several related recalls for the BMW i4:
- NHTSA Campaign 22V944000: A recall concerning the high-voltage battery ECU software, which could cause an interruption of electrical power in certain 2022-2023 i4 models.
- NHTSA Campaign 25V395000: A recall for electric drive motor software that may shut down the high-voltage system, causing a loss of drive power in 2022-2025 i4 vehicles.
- TSB B640422: While not a recall, this TSB addresses a "groaning noise" from the heating and air-conditioning unit in some i4 models, which is attributed to ventilation flaps. While this is a separate issue, it's a useful data point when diagnosing A/C system noises.
These issues are not directly caused by the bracket, but they highlight the complexity of the i4's electrical and thermal management systems, of which the A/C compressor is a critical part.
Buying a Used A/C Compressor Bracket
For a simple, non-wear component like a cast metal bracket, a used OEM part is an excellent, cost-effective choice. Unlike aftermarket parts which may not exist for such a specific component, a used genuine BMW part guarantees perfect fitment.
What to Inspect Before Buying:
- Check for Cracks: Carefully inspect the entire bracket, paying close attention to the areas around the bolt holes and any corners or thin sections. Stress cracks can be hairline and difficult to see.
- Look for Bending or Warping: Place the bracket on a flat surface to ensure it is not bent or warped. Any deformation can cause alignment issues with the compressor, leading to new vibrations or stress on refrigerant lines.
- Examine Bolt Holes: Ensure the bolt holes are round and not elongated or damaged. Damaged mounting points suggest the part was under extreme stress.
- Verify Part Number: While the casting number may be visible, confirm with the seller that the part was removed from a 2022-2025 BMW i4 to ensure compatibility.
Replacement Difficulty and Labor
- Difficulty: 2 out of 5
- DIY Feasible: Yes, for mechanics comfortable with working under a vehicle.
- Estimated Time: 1.0 - 1.5 hours
Replacing this bracket is a relatively straightforward process. It does not require discharging the A/C system, which avoids the need for specialized refrigerant handling equipment. The general steps involve safely lifting and supporting the vehicle, removing the front underbody panels for access, 🎬 See this video showing the BMW i4 undercarriage layout supporting the A/C compressor with a jack or stand, unbolting and removing the old bracket, and then installing the new one. It is crucial to torque all bolts to the manufacturer's specification to prevent future issues.
Pro Tip: When unbolting the bracket, the A/C compressor will be loose. Ensure it is properly supported to avoid putting stress on the rigid refrigerant lines and electrical connectors.
Cost Comparison
| Part Type | Estimated Price Range |
|---|---|
| New OEM (Dealer) | $55 - $85 |
| New Aftermarket | Not Commonly Available |
| Used OEM | $30 - $60 |
| Shop Labor Cost | $150 - $250 |
Frequently Asked Questions (FAQ)
Is this A/C bracket the same as an engine or motor mount?
No. This is a component bracket specifically for the A/C compressor. It is much smaller and lighter than the main mounts that support the electric drive unit (motor).
What noise does a bad A/C bracket make?
The most common noise is a metallic rattle or buzzing that is most apparent when the A/C system is running. Because the i4 is so quiet, any new noise from the front of the vehicle should be investigated.
Can I drive with a broken A/C compressor bracket?
It is not recommended for long. While the car may still drive, a broken bracket allows the heavy A/C compressor to vibrate excessively. This can damage the compressor itself, its electrical connections, or the rigid refrigerant lines, leading to a much more expensive repair. Since the compressor also cools the battery, ensuring it operates smoothly is critical.
Why is the number on my old part (100006199) different from the one I need to order (64509893881)?
The number physically on the part is a casting number, used for manufacturing tracking. The number used for ordering from a dealer or parts supplier is the official OEM part number, 64509893881. Always use the official part number for purchasing.
Helpful Videos
Technical Specifications
OEM Part Numbers: 64509893881 100006199 (Casting Number)
Material: Cast Aluminum
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- BMW i4: