BMW M3 F80 M4 F82 M2 F87 Differential rear axle gear 2289970
BMW M3 F80 M4 F82 M2 F87 Differential rear axle gear 2289970 - Image 2
BMW M3 F80 M4 F82 M2 F87 Differential rear axle gear 2289970 - Image 3
BMW M3 F80 M4 F82 M2 F87 Differential rear axle gear 2289970 - Image 4
BMW M3 F80 M4 F82 M2 F87 Differential rear axle gear 2289970 - Image 5
BMW M3 F80 M4 F82 M2 F87 Differential rear axle gear 2289970 - Image 6
BMW M3 F80 M4 F82 M2 F87 Differential rear axle gear 2289970 - Image 7
BMW M3 F80 M4 F82 M2 F87 Differential rear axle gear 2289970 - Image 8
Category:

BMW M3 F80 M4 F82 M2 F87 Differential rear axle gear 2289970

(33 Customer Reviews)

In Stock

$1,500.00

BMW M3 F80 M4 F82 M2 F87 Differential rear axle gear 2289970

Part Number: 2289970 (HAG 215 L)

Type: Electronically Controlled Limited-Slip Differential (LSD)

The 2289970 is the high-performance rear axle final drive designed specifically for the F80 M3, F82/F83 M4, and the F87 M2/M2 Competition. Unlike a tra

Category:

BMW M3 F80 M4 F82 M2 F87 Differential rear axle gear 2289970

Part Number: 2289970 (HAG 215 L)

Type: Electronically Controlled Limited-Slip Differential (LSD)

The 2289970 is the high-performance rear axle final drive designed specifically for the F80 M3, F82/F83 M4, and the F87 M2/M2 Competition. Unlike a traditional mechanical LSD, this “Active M” unit uses an electric actuator to vary the locking torque from $0\%$ to $100\%$ in milliseconds, providing unparalleled traction and “drift-ability” characteristic of the F-chassis M cars.

Technical Specifications

  • Compatibility: * BMW M3 (F80): 2014–2018

    • BMW M4 (F82/F83): 2014–2020

    • BMW M2 (F87): All models including Competition and CS.

  • Final Drive Ratio: $3.46:1$ (Standard for both Manual and DCT models).

  • Control Unit: Interfaces with the GHAS (Regulated Rear Axle Differential Lock) control module.

  • Internal Mechanism: Multi-plate clutch pack with an integrated electric motor actuator.

Key Performance Features

  • Predictive Locking: By analyzing steering angle, throttle position, brake pressure, and wheel speeds, the differential can lock before a wheel starts to slip, stabilizing the car during aggressive turn-entry.

  • Dynamic Stability Integration: It works in tandem with MDM (M Dynamic Mode). In high-performance settings, it allows for controlled oversteer by precisely managing the torque split between the left and right rear wheels.

  • Thermal Management: The housing features prominent cooling fins to dissipate the extreme heat generated by the clutch plates during track use or heavy drifting.

  • Hollow Input Shaft: Designed for weight reduction while maintaining the structural integrity required to handle the $550\text{+ Nm}$ of torque from the $S55$ engine.

Technical Installation & Maintenance

This is a highly sensitive electronic component. For professional inventory or installation, adhere to these guidelines:

  1. GHAS Calibration: If replacing the differential, the GHAS control module must be “learned” to the new unit via BMW ISTA. The module needs to calibrate the motor’s “zero point” and the clutch thickness characteristics to ensure smooth engagement.

  2. Fluid Requirements: This unit requires BMW Final Drive Gear Oil SAF-XJ. Note that it uses a specific friction modifier for the carbon-fiber-reinforced clutch plates. Using standard gear oil will cause “chatter” and premature plate wear.

  3. Oil Capacity: Approximately $1.1$ Liters. It is a “fill-to-spill” system—fill until the fluid reaches the bottom of the fill plug hole while the vehicle is level.

  4. Hardware Note: The rear differential is mounted to the subframe using high-torque bolts. BMW recommends replacing the Output Shaft (Axle) Bolts and the Driveshaft Nut upon reinstallation to prevent loosening under high torque loads.

Warning: When sourcing used units, check for leaks around the Input Shaft Seal and the Electric Actuator Connector. Physical damage to the aluminum cooling fins can also lead to overheating during track sessions.

Average Rating

4.52
33 Review
5 star 52%

4 star 49%

3 star 0%

2 star 0%

1 star 0%

33 reviews for BMW M3 F80 M4 F82 M2 F87 Differential rear axle gear 2289970

  1. Caleb Hughes (verified owner) –

    Used for website design and layout testing.

  2. Daniel Evans (verified owner) –

    No irregular movement shown.

  3. Evelyn Reed (verified owner) –

    Used for design purposes.

  4. Henry Foster (verified owner) –

    Brakes appear responsive and reliable.

  5. Alexander Lewis (verified owner) –

    Gearbox appears smooth in operation.

  6. Lily Adams (verified owner) –

    Sample content.

  7. Joshua Carter (verified owner) –

    No irregular behavior shown in the interface.

  8. Charlotte Evans (verified owner) –

    BMW Transmission

  9. Amelia Brooks (verified owner) –

    Used for layout purposes.

  10. Harper Collins (verified owner) –

    Gearbox appears smooth in operation.

  11. Evelyn Reed (verified owner) –

    Clean design integration shown.

  12. Ava Carter (verified owner) –

    Modern styling in interface design.

  13. Natalie Adams (verified owner) –

    Strong visual styling in product display.

  14. Amelia Foster (verified owner) –

    Engine performance appears strong in this demo setup.

  15. James Parker (verified owner) –

    Used in website prototype.

  16. Alexander Allen (verified owner) –

    Sample UI text.

  17. Lucas Brooks (verified owner) –

    Used for interface testing.

  18. Natalie Moore (verified owner) –

    Transmission runs smoothly in demo.

  19. Victoria Hall (verified owner) –

    BMW Brake System

  20. Lily Martin (verified owner) –

    BMW Wheels

  21. Daniel Wright (verified owner) –

    For layout use.

  22. Natalie Moore (verified owner) –

    Brakes respond instantly in simulation.

  23. Scarlett Adams (verified owner) –

    Transmission shifts smoothly in demo.

  24. Emma Collins (verified owner) –

    Looks factory-level quality.

  25. Ryan Cooper (verified owner) –

    Stylish and durable-looking wheels.

  26. Joseph Lee (verified owner) –

    BMW Gearbox

  27. Liam Thompson (verified owner) –

    Nice premium aesthetic.

  28. Samuel Brown (verified owner) –

    Good sense of control and safety.

  29. Layla Baker (verified owner) –

    Well-designed product display.

  30. Benjamin Morgan (verified owner) –

    Engine presentation looks powerful and smooth.

  31. Jack Richardson (verified owner) –

    Really impressed with the smooth performance shown here.

  32. Abigail Johnson (verified owner) –

    Good comfort impression in UI.

  33. Victoria Hall (verified owner) –

    Strong design impression.

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