2023-2024 BMW X1, X2 Rear Axle Wheel Bearing Noise / DTCs

Owners of certain 2023-2024 BMW X1 (U11) and X2 (U10) models may encounter issues related to the rear axle wheel bearings. These problems manifest as unusual noises or warning lights on the instrument cluster. BMW has released Technical Service Bulletin (TSB) SIB 33 01 26, dated February 18, 2026, to provide diagnostic and repair procedures for these concerns. This TSB outlines the conditions, causes, and the necessary steps to correct the problem, specifically addressing the BMW X1 rear axle wheel bearing noise and related fault codes.

This repair is noted as being both mobile-friendly and remote software upgrade (RSU) friendly.

Symptoms

Owners may notice one of two primary symptoms:

1. Noise Complaint: A "Humming or clicking type noise" can be heard from the rear axle, typically in the speed range of 15 to 65 mph. The intensity of this noise may vary with road speed. BMW references attached videos, "V33 01 26 Humming" and "V33 02 26 Clicking", for technicians to identify these sounds.
2. Fault Memory Entry: The customer may observe the "Dynamic Stability Control malfunction indicator lamp" illuminated, along with related "Check Control Message" warnings. These warnings are typically accompanied by specific fault codes stored in the Integrated Brake module's fault memory.

Fault Codes (DTCs)

When a fault memory entry is present, technicians may find the following diagnostic trouble codes (DTCs) in the Integrated Brake module:

Code	Description
4809B7	Wheel speed sensor - rear left - tooth missing
4809C2	Wheel speed sensor - rear right - tooth missing
480AB4	Wheel speed sensor - rear right – noise monitoring
480AAD	Wheel speed sensor - rear left – noise monitoring

Causes

BMW has identified the following root causes for these issues:

1. For Noise Complaints: Insufficient protection allows water to directly enter the wheel bearing. This water ingress can lead to corrosion of the wheel bearing's inner race.
2. For Fault Memory Entries: The presence of foreign particles or corrosion at the interface to the wheel speed sensor is the underlying cause.

Repair Procedure

The correction for both the noise complaint and the fault memory entry is to replace both rear axle wheel bearings. The procedure outlined in TSB SIB 33 01 26 details the following steps:

1. For Noise Complaint: Replace both rear axle wheel bearings. This must be performed according to repair instruction REP 33 41 180, titled "Replacing the rear wheel bearing."
2. For Fault Memory Entry: First, technicians must perform a vehicle test to confirm the presence of one of the listed fault codes (4809B7, 4809C2, 480AB4, 480AAD) in the Integrated Brake system's fault memory. Once confirmed, both rear axle wheel bearings are to be replaced following repair instruction REP 33 41 180.

Required Parts

To complete this repair, the following parts are specified. Technicians should enter the vehicle's VIN or chassis number into the Electronic Parts Catalog (ETK) or AIR system to ensure the correct parts are ordered for the specific vehicle configuration.

Part Number	Description	Quantity
31 20 8 882 498	Wheel hub with bearing	2
31 10 6 894 168	Multi-purpose bolt (M12x1.25x33ZNS3)	8
34 10 6 864 424	Torx screw with washer (M12x1.5x43 ZNS3)	4
34 20 6 850 560	Hex bolt (M8x22)	4
31 20 6 795 249	Collar screw with spring (M16x1.5x72-8.8)	2
83 12 2 296 187	Brake pad paste	1

Additionally, other necessary materials and small parts, such as fluids, lubricants, one-time use screws, nuts, and seals, must be selected from the ETK or other approved BMW Group resources according to the specific vehicle type. These items should be invoiced separately under the repair code listed in this bulletin.

Warranty Information

This repair is covered under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks, or the BMW Certified Pre-Owned Program. The following repair codes and labor operations apply:

• Repair Codes:

  • 3341033900: Rear wheel bearing Unpleasant noises (1)
  • 3341031500: Rear wheel bearing Permanent malfunction (Related Fault Codes Stored) (2)

• Labor Operations (Flat Rate Unit allowances):

  • 00 00 006: Carrying out vehicle test (Main work)
  • 00 00 556: Carrying out vehicle test (Plusposition work) - Use if a Main labor code is used for another repair.
  • 61 21 528: Supporting voltage of the vehicle electrical system / recharging vehicle battery
  • 61 00 006*: Carrying out vehicle diagnosis, ABL (Work time) including confirming the source of the noise is from the rear bearings (WT FRU)
  • 00 58 500*: Diagnosis Worktime Flat Rate (2 FRU)
  • 33 41 681: Replacing both bearings for rear wheels (including removing and installing the rear brake pads and discs)

Technicians should refer to BMW Group's AIR application resource for specific flat rate unit (FRU) allowances by entering the VIN/Chassis number.

What Owners Should Know

If your 2023-2024 BMW X1 or X2 is experiencing a BMW X1 rear axle wheel bearing noise or displaying Dynamic Stability Control warnings, it is important to have the vehicle inspected by a BMW authorized service center. Reference TSB SIB 33 01 26 when discussing these symptoms with your technician.

NHTSA ID: 11028922