What is the main benefit of upgrading my differential bushings?

Upgrading your differential bushings, like with this SuperPro kit, helps to reduce unwanted movement of the rear differential. This leads to a more precise and responsive feel from your drivetrain, especially during acceleration and deceleration.

Will these bushings make my ride noisy or uncomfortable?

No, SuperPro has designed these bushings to maintain the original factory levels of noise, vibration, and harshness isolation. You should experience improved drivetrain accuracy without a noticeable increase in cabin noise or a harsher ride.

What vehicles does this SuperPro bushing kit fit?

This kit fits a wide range of BMW models including the 323Ci, 323i, 325Ci, 325i, 328Ci, 330Ci, 330i, and Z4. It covers model years from 1999 through 2021 for various configurations.

Superpro Differential Bushing Kit SPF4330K

Name: SuperPro 2003 BMW Z4 2.5i Rear Upper Forward Differential Pinion Mount Bushing Kit
Brand: Superpro
Price: 109.99 USD
Availability: InStock

SuperPro 2003 BMW Z4 2.5i Rear Upper Forward Differential Pinion Mount Bushing Kit

$109.99

Only 1 left in stock

Superpro differential bushing kit SPF4330K. Improves rear differential accuracy and durability for BMW 3 Series and Z4.

Key Features

Fits a range of BMW 3 Series and Z4 models from 1999-2021.
Replaces the worn forward differential pinion mount bushings.
Polyurethane material offers improved durability over stock rubber.
Maintains OEM levels of noise, vibration, and harshness isolation.
Helps to improve differential location and drivetrain responsiveness.

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Will this fit your vehicle?

Product Details

If you're noticing a bit of sloppiness or delayed response from your rear end when you get on the gas or let off, especially during spirited driving, it might be time to look at your differential mount bushings. The stock rubber ones on many BMW models, like the 3 Series and Z4, tend to wear out and allow too much movement. This SuperPro kit replaces those worn-out forward differential pinion mount bushings, helping to keep your differential precisely located under all sorts of driving conditions.

SuperPro uses a well-built polyurethane material that's designed to last much longer than the original rubber. While it firms up the differential mounting for improved accuracy, it's engineered to maintain the factory levels of comfort inside the cabin, so you won't get any extra noise or vibration. This means you get a more responsive feel from your drivetrain without sacrificing ride quality, and the improved material means these bushings will hold up better over time compared to the stock parts.