BMW Suspension Bushings & Mounts

Upgrade your drivetrain performance with ECS Tuning Performance Polyurethane Differential Bushings—engineered specifically for BMW F8x/G8x models and designed to deliver superior power transfer, durability, and driving precision.

Factory rubber differential bushings are built for comfort, absorbing vibrations between the differential and chassis during everyday driving. However, they are a known wear item that degrade over time—especially under spirited or aggressive driving conditions. Many F8x/G8x owners experience premature cracking and wear, leading to excessive drivetrain movement, reduced throttle response, and unwanted wheel hop.

ECS Tuning’s in-house engineered polyurethane differential bushings provide a high-performance solution to these common issues. By significantly reducing drivetrain deflection, these upgraded bushings enhance throttle response, improve handling stability, and minimize wheel hop—resulting in a more connected and controlled driving experience.

Constructed from durable 95A durometer red polyurethane and paired with precision CNC-machined 6061-T6 aluminum sleeves, these bushings are built to withstand extreme driveline forces while maintaining street-friendly comfort. Unlike solid or delrin mounts, ECS polyurethane bushings strike the perfect balance between performance and daily drivability—delivering increased rigidity without excessive noise, vibration, or harshness (NVH).

Whether you're carving canyon roads, launching at the drag strip, or simply commuting, these performance differential bushings ensure more efficient power delivery from the differential to the wheels—giving you better throttle modulation, traction, and overall control.

Key Features & Benefits:

Performance polyurethane differential bushings for BMW F8X models
Reduces drivetrain movement and improves power transfer
Enhances throttle response and minimizes wheel hop
95A durometer polyurethane for optimal balance of performance and comfort
CNC-machined 6061-T6 aluminum inserts with Type II black anodizing for corrosion resistance
Resistant to oil, chemicals, ozone, and road salt for extended service life
Designed to handle high torque loads and extreme driving conditions
Engineered using real-world load data and worst-case operating scenarios
Maintains street-friendly NVH levels compared to solid mounts
Replace worn factory bushings with ECS Performance Polyurethane Differential Bushings and experience tighter handling, improved drivetrain response, and long-lasting reliability.

Worn rubber differential mounts will lead to the differential twisting and shifting around in the rear subframe. Not only will this be noisy but it's bad for driver confidence and bad for the chassis as well. Even on fresh rubber bushings the differential has deflection and twist, especially if the car has been modified for more torque. Since the differential is centrally mounted in the rear subframe, with all suspension mounts interconnected, a differential with too much deflection will affect handling and could even damage the rear subframe.

These 88A urethane E46 diff mounts are much stiffer than stock but still not as solid as our Turner aluminum/Delrin bushings. This set will resist twisting much better than the stock rubber mounts. Included are the two front diff mounts and the rear mount in the cover.

These bushings replace the stock rubber bushings and offer a better driving feel, increased lifespan, and better wheel alignment.

Rubber bushing allow for a lot more movement and are more susceptible to wear and tear from spirited driving and harsh weather conditions. Polyurethane is much more resistant to wear and is stiffer, reducing the total amount of movement that would normally affect the alignment negatively.

The main mounting bolt for the differential in the E36 is susceptible to shearing off during extreme driving conditions. This can cause internal damage to your diff, leaving you stranded at the track or on the side of the road. Active Autowerke's differential support bracket eliminates this issue forever in under an hour installation.

Previously used Active Autowerke Part Number AA-DSB-E36

This product fits the following BMWs:
1992-1999 E36 323i 325i 328i M3

Swapping in E46 control arms into your E30 or E36 significantly increases negative camber by widening the track width and also gives you more clearance for more steering angle. Condor's CNC machined control arm brackets are made from solid steel and are fitted with a solid hex-shaped bushing. Designed for the street or the track, they hold the control arm steady and eliminate "shimmy" caused by stock bushings. They sharpen steering and improve overall driving feel. Comparable to the NLA Treehouse E36 & E30 Eyeball Arms.

Easiest install of any aftermarket solution
Allow clearance for E30 M50 Conversion exhaust
Street Approved, marginal increase in NVH
Easy Installation, no need for a press
CNC machined steel construction
Solid design without the maintenance of spherical bearings
Heavy-Duty replaceable UHMW insert. Don't be misinformed, UHMW is the best material for these inserts. Delrin is not self-lubricating and will crack and degrade over time.
Powder coated white for corrosion resistance
Improve caster with M3 offset geometry
Keep proper steering geometry under high loads
Made in the U.S.A.
Fitment:
E30 84-91 3 Series
E36 92-98 3 series & Z3

Note that you will need to use E36 outer tie rods and E90 inner tie rods when installing in an E30 or E36

Be sure to measure your control arms to determine if you need 21mm or 23mm. Meyle makes a standard e46 control arm and a Heavy Duty control arm. Most HD arms have a hex that is larger in size (23mm). Lifetime Warranty

Replacing your struts and shocks? Don't forget the bushings! The rubber mounts for the shocks will go bad over time, especially if you drive hard or the roads are particularly rough. The shock mounts locate the front struts and rear shocks to the car - providing a quiet and vibration-free buffer between the road and the cabin. Shock mounts and bushings can wear out just like any other rubber part on the car. This leads to more noise and harshness reaching the chassis and may complicate your new suspension install. When installing new shocks, that is the perfect time to also replace the mounts. There is no additional time to install them, no special tools required, and doesn't take any extra time! If you re-use the original mounts you have the risk of them failing before your next shock replacement, doubling your labor costs. 

This item fits the following BMWs: 
2006-2012 E9X BMW All xi models - 325xi 328xi 330xi 335xi