Rear Control Arm for BMW E46 M3 S54 (1999-2005)

Our sealed Monoball Rear Trailing Arm Bushings (RTAB) are the best solution for completely eliminating deflection and unwanted toe changes on the rear of the E36, E46, and Z4. While rubber and urethane bushings flex during load, the toe can change widely giving you nervous and unpredictable handling. These RTABs have a solid aluminum housing with a high-quality sealed OE bearing. These bushings were developed from years of competition use in various racing and HPDE events. There is simply no better RTAB unless your racing class rules prohibit the use of mono or spherical bearings.

The rear trailing arm bushings take a lot of abuse from acclerating, braking and cornering. The stock rubber bushings are just not up to the task of keeping rear wheel alignment in spec for very long, especially if you have upgraded to stickier tires and a better suspension. The pliable rubber flexes and twists which slows down reaction time and leaves you with a car that feels nervous and 'tail happy'. Urethane helps to control the alignment but issues with fitment, maintenance, and longevity keep us from recommending urethane on anything but a street car. We also offer a Delrin RTAB for cars that must conform to certain racing class rules. These sealed spherical bearings are the best at controlling rear toe alignment.

Our aluminum RTABs are very well made - high grade aluminum alloy and steel CNC'd out of a billet by an ISO 9001 certified manufacturer, each component is either hardcoated or nickel plated. While multiple manufacturers offer two piece designs, our research showed that a one piece bushing is a better design featuring a sealed bearing to keep contaminants out extending the life of the bearing.

Features:

Key Benefits:

• Rear Trailing Arm Monoball eliminates unwanted deflection, maintaining alignment settings and minimizing wheel hop.
• Allows full rear trailing arm articulation for low friction movement and eliminates binding found in rubber and poly bushings.
• Completely streetable: utilizes an OES Lemforder brand sealed, greased ball joint for an extremely long service life with no increase to NVH.

Design Features:

• Housing: Billet CNC 6061-T6 aluminum, type II anodized for exceptional durability and corrosion resistance
• Bearing: OE Mercedes/lemforder 2043520027 Sealed ball joint
• Bearing inserts: CNC machined 303 stainless steel.
• Rebuildable

Clickhere for installation instructions.

This item fits the following BMWs:
1992-1998 E36 BMW 318i 318is 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi M3
2003-2008 Z4 BMW Z4 2.5i Z4 3.0i Z4 3.0si Z4 M Roadster M Coupe

Dial in your BMW’s handling like never before with this exclusive Doorbuster offer! Turner Motorsport’s Monoball Rear Trailing Arm Bushings (RTAB) deliver precision alignment, improved rear articulation, and race-inspired performance for the street or track. With a newly available sealed design, these bushings combine ultimate performance with long-lasting durability—making them the perfect upgrade for any BMW enthusiast.

Turner Monoball Rear Trailing Arm Bushings (RTAB)

Turner’s redesigned RTABs now feature a sealed bearing, protecting against contaminants like salt, grit, and road debris while eliminating the need for any lubrication or maintenance—ever. Drawing on over two decades of racetrack expertise, Turner brings precision, durability, and performance straight to your BMW.

Key Benefits:

Eliminates unwanted deflection, maintaining alignment and reducing wheel hop

Allows full trailing arm articulation with low-friction movement

Eliminates binding issues common in rubber or poly bushings

Street-ready: uses OE Lemforder sealed, greased ball joints for long life without increasing NVH

Design Features:

Housing: CNC billet 6061-T6 aluminum, type II anodized for corrosion resistance and strength

Bearing: OE Mercedes/Lemforder 2043520027 sealed ball joint

Bearing Inserts: CNC machined 303 stainless steel

Rebuildable: Rebuild Kit ES2695379 (x2) available

Turner Monoball Rear Upper Control Arm Inner Bushings – Race

For the ultimate in performance, Turner also offers monoball rear upper control arm bushings designed exclusively for track use. These race-grade bushings prevent side loading, allowing full control arm movement and unparalleled precision. While optimized for the track, daring enthusiasts willing to tolerate increased noise, vibration, and harshness may also consider them for street use.

Turner Motorsport continues to deliver high-quality BMW performance parts that combine durability, precision, and race-bred technology—allowing your BMW to perform at its full potential.