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Premium OEM Standard PU Bushings for daily driving and challenging road conditions

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Bushings for motorsport, drift and racing with a hardness of 80 Sha (red PU) / 90 Sha (yellow PU)

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High-performance adjustable control arms, camber links, and traction arms for both street and track applications

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For high-performance BMW F-series platforms, rear differential control plays a critical role in how effectively power is transferred to the road. The Polyurethane Rear Differential Bushing SPORT (Part #: 032056A) is engineered for drivers who demand maximum drivetrain precision under aggressive driving conditions.

Product Overview

  • Product name: Rear Differential Bush SPORT
  • Part #: 032056A
  • OEM references:
    • 33172284039
    • 33174798197
  • Required per vehicle: 1
  • Hardness: 90 Sha
  • Material: Polyurethane (PU / PUR)

This SPORT-version bushing is designed to significantly limit differential movement, ensuring more immediate throttle response and consistent power delivery.

Vehicle Fitment (USA Market)

BMW 5 Series VI – F10 / F11 (2010–2017)

  • Including BMW M5 (2011–2017)
  • USA engines include turbocharged inline-6 and V8 options, with the M5 featuring the high-output S63 twin-turbo V8, placing extreme loads on the rear differential mounts.

BMW 6 Series III – F06 / F12 / F13 (2011–2018)

  • Including BMW M6 (USA market)
  • Grand Coupe, Coupe, and Convertible configurations with powerful turbocharged drivetrains, requiring enhanced drivetrain stability under acceleration.

Why Upgrade to Polyurethane?

Compared to OEM rubber, polyurethane differential bushings offer clear advantages for performance-oriented BMW builds:

  • Reduced differential deflection under load
  • Improved throttle response and more direct power transfer
  • Greater drivetrain stability during hard acceleration and cornering
  • Resistance to oil, heat, and environmental degradation
  • Extended service life compared to rubber bushings

The 90 Sha hardness of this SPORT bushing makes it especially suitable for vehicles that see spirited driving, track days, or performance tuning.

Intended Use and NVH Note

This part is not equivalent to OEM rubber bushings. Due to its high stiffness, it can transmit increased vibration and drivetrain noise to the body, which is expected behavior for a SPORT compound.

Recommended for:

  • Performance street builds
  • Track-day cars
  • Tuned BMW M models
  • Drivers prioritizing response and control over comfort

For drivers focused strictly on comfort and noise isolation, OEM-style rubber components may be more appropriate. For those seeking precision and performance, polyurethane is the superior solution.

The Polyurethane Rear Differential Bushing SPORT (032056A) is a purpose-built upgrade for BMW F10/F11 and F06/F12/F13 platforms, including M5 and M6 models in the USA market. By minimizing unwanted differential movement, it unlocks sharper response, improved traction, and a more connected driving experience—exactly what performance BMWs are designed to deliver.