2024-2026 BMW X1/X2 DKG Transmission Oil Service TSB

BMW has issued Service Information Bulletin SIB 28 01 25, dated January 27, 2026, for specific 2024-2026 BMW X1 (U11) and X2 (U10) models equipped with a Double Clutch Transmission (DKG). This bulletin, which supersedes SI B01 07 20 dated February 2025, addresses instances where owners may see a "Transmission oil service required" message in their vehicle's Check Control Message (CCM) system.

This bulletin provides updated information regarding the situation, cause, and procedure for addressing the DKG transmission oil service. It also includes revised claim information and labor operation codes for technicians.

Symptoms

Owners of affected 2024-2026 BMW X1 and X2 vehicles may observe a Check Control message (CCM) displaying the text "Transmission oil service required" (ID 2120). This warning indicates that the DKG transmission oil needs to be changed.

If the vehicle continues to be driven for approximately 1,900 miles (3,000 km) after the initial CCM appears, a second, more urgent message will be displayed: "Transmission fault!" (ID 368).

Diagnosis / Trigger Conditions

The "Transmission oil service required" warning (ID 2120) is typically triggered by one of two conditions:

• Mileage: The vehicle has accumulated between 60,000 miles (approximately 95,000 km) and 78,000 miles (approximately 125,000 km).
• Time: Six years have passed since the vehicle's production date. This six-year interval is based on the production date, not the first registration date or the pre-delivery check (PDI) completion date.

The underlying cause for this message is the natural aging of the oil within the double clutch transmission. The oil's lifespan is affected by usage and the vehicle's driving profile. Once the transmission oil reaches its service life limit, a "transmission oil change" is necessary.

Important Warnings

BMW notes that if the "Transmission oil service required" message appears to have displayed prematurely, owners or technicians should follow standard technical reporting procedures to investigate further.

Repair Procedure Summary

The correction for this issue involves changing the oil in the Double Clutch Transmission (DKG). Technicians are instructed to follow Repair Instruction 00 00 701, titled "Servicing double-clutch transmission (DKG)," to perform the necessary oil change.

For warranty claims, the repair code is 85990701MP, designated as MAINTENANCE SERVICE, MANUAL TRANSMISSION OIL (CCM). The labor operation code for servicing the DKG, including a vehicle test, is 00 00 701.

Required Parts

To ensure the correct parts are used for the specific vehicle, technicians must enter the VIN or chassis number into BMW's ETK or AIR systems. This process accounts for the vehicle's specific equipment and options.

The following parts are generally required for the DKG oil change:

• Part Number: 28 00 5 A41 030
  • Description: S Set, threaded oil plug (GD7/GN7Qxxxx)
  • Quantity: 1
• Part Number: 83 22 5 B3A C81
  • Description: DCTF 2 (1 Liter bottle)
  • Quantity: Claim 4 and 0.55 liter in sublet

Owner Action

If your 2024-2026 BMW X1 or X2 displays the "Transmission oil service required" message, it indicates that your Double Clutch Transmission (DKG) is due for an oil change. It is recommended to contact your authorized BMW dealership to schedule this maintenance. This service is crucial for the longevity and proper functioning of your transmission. If you experience the more severe "Transmission fault!" message, it is even more imperative to seek service promptly.

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Source: NHTSA ID 11027985