BMW G20 G21 G22 G26 xDrive ORIGINAL steering gear steering gear

For the BMW G-Series (3 Series G20/G21 and 4 Series G22/G26) with xDrive, finding the “original” steering gear can be tricky because BMW has updated the part number more than 20 times to improve software logic and mechanical durability.

The current “umbrella” part number for the genuine BMW xDrive steering rack is 32105B653A1, but your specific car might use one of several “superseded” numbers.

1. Key Part Numbers (xDrive Models)

Because xDrive models have different front axle geometry and clearance requirements than RWD models, you must use a rack specifically designated for all-wheel drive.

• Current Production/Service Part: 32105B653A1

• Common Supersessions (Interchangeable):

  • 32105A82526

  • 32105A748E3

  • 32105A65A20

  • 32106899681

  • 32106896214 (Early production)

2. Technical Compatibility

The G20/G22 platform uses an Electric Power Steering (EPS) system. However, the hardware differs significantly based on the engine and options:

• Variable Sport Steering (Option S2VLA): Many M-Sport or M340i/M440i models come with this “variable ratio” rack. It allows for fewer turns lock-to-lock (approx. 2.1 turns). If your car has this option, you must replace it with an S2VLA-coded rack.

• 4-Cylinder vs. 6-Cylinder: Interestingly, BMW uses different rack architectures for different engines. The 330i (4-cyl) often uses a dual-pinion system, while the M340i (6-cyl) uses a belt-driven paraxial system due to engine bay packaging and weight.

3. Known Failure Points

If you are replacing your rack, it is likely due to one of these common G-series issues:

• The “BMW Knock”: A mechanical clunking sound when turning at low speeds or driving over cobbles.

• Electronic Failure: Loss of power assistance often accompanied by a “Steering effort increased” message.

• Sheared Motor Bolts: On some early units, the aluminum bolts holding the electric motor to the rack can corrode and snap.