BMW Control Arm Replacements & Upgrades

The SPL BMW F2X/F3X Front Lower Control Arms (FLCA) provide roll center, camber, and track width adjustment for the rear wheel drive (RWD) F2X/F3X BMWs while eliminating bushing deflection resulting in sharpened steering response and driving precision.

Negative Camber Benefits

The ability to run more negative camber greatly improves the peak lateral grip available. Adding negative camber results in the tire having an optimal contact patch as the body rolls due to cornering forces. This is especially important with better tires and a must-have for anyone looking to prevent excessive outer shoulder wear (and heating) on their tires due to a lack of camber.

Wider Front Track Width Benefits

Further handling improvements can be had by increasing the front track width from the factory 60.5" (F3X) or 59.9" (F2X) to be closer to the M3's 62.2". If you applied the M3's width to the M340i it would reduce the outer front tire loading by roughly 20 lbs and apply it to the inner front tire. The result would be greater peak grip (~0.04G), improved stability, and faster lap times.

Roll Center Correction Benefits

Lowering the F2X/F3X results in a greater distance between the front roll center and the center of gravity. This acts like a longer lever, creating more body roll, bumpsteer, and requiring additional static camber angle to maintain the same handling. The SPL front lower control arms allow the roll center to be corrected for a wide range of ride heights to improve handling and stability.

The lower control arms come with a ride height sensor bracket to maintain the factory ride height sensor location, regardless of length of the arm to keep those finicky BMW chassis electronics happy.

Benefits

Adjustable Camber, Roll Center, and Track Width

Eliminates Bushing Deflection

Improved Tire Life with Ideal Camber Settings

Lightweight, High-Strength Construction

Stackable 304SS Roll Center Spacers in 1/8" and 1/4" Sizes

US Made, PTFE Lined FK Rod Ends 

Materials

6061-T6 aluminum black anodized arm, clamps, and spacers

4130 CrMo electroless nickel-plated double adjuster

Ti6Al4V titanium socket head cap screws

304 stainless steel roll center and knuckle spacers

5/8" 4140 CrMo stud

FK PTFE-lined spherical bearings (F1 spec, self-cleaning)

Suitable for all uses, from daily driver to race car.

The Powerflex Front Control Arm Rear Bushing (Caster Offset) for the BMW F48, F49 X1, and F39 X2 is a premium suspension upgrade designed to improve handling, steering feel, and suspension durability. These bushings replace the factory-installed rubber bushings, which are prone to wear and deflection over time, with high-quality polyurethane bushings that deliver enhanced performance and longevity.

Key Features:

1. Caster Offset Design:

   • The bushing features a caster offset, meaning it slightly adjusts the position of the control arm to increase the vehicle’s caster angle. This improved geometry enhances the car's straight-line stability and helps maintain better steering feel during cornering. The result is sharper turn-in, better directional control, and a more responsive overall driving experience.

2. Superior Material – Polyurethane:

   • Powerflex uses high-performance polyurethane, which is much more durable than standard rubber bushings. Polyurethane bushings resist degradation from oil, road grime, and temperature extremes, making them ideal for both daily driving and high-performance applications.
   • Benefits of Polyurethane:
     • Reduced Flex and Deflection: Offers a firmer connection between the control arm and chassis, reducing unwanted movement in the suspension and improving steering accuracy.
     • Extended Lifespan: Compared to the stock rubber bushings, these will last significantly longer, making them a solid investment for long-term performance and reliability.
     • Improved Handling: The reduced flex and firmer construction mean that the suspension responds more precisely to driver inputs, improving overall handling and cornering stability.

3. Applications:

   • BMW X1 (F48, F49): This model is BMW’s compact luxury crossover SUV. The Powerflex bushings provide better handling, making the X1 more responsive and stable, especially at higher speeds or during spirited driving.
   • BMW X2 (F39): Known for its sportier, coupe-like stance, the X2 benefits from the improved geometry and stiffer bushing, resulting in even sharper steering and enhanced cornering ability, further emphasizing its sport-focused character.

4. Improved Caster Angle:

   • The increased caster angle results in a more self-centering steering feel, providing better directional stability at high speeds, and enhancing control during cornering. This is especially beneficial for drivers who seek a more engaging driving experience or who use their BMW for spirited driving or track days.

5. Performance and Practicality:

   • These bushings aren’t just for performance enthusiasts. Even for daily driving, they offer improvements in steering feedback and stability. The added durability ensures that your suspension components last longer, making it a worthwhile upgrade even for those who don’t push their cars to the limit.

6. Professional Installation Recommended:

   • Installing these bushings requires removing the control arms and pressing out the old bushings. Since the caster offset alters the suspension geometry, a professional alignment is also recommended post-installation to ensure optimal performance.

Megan Racing offers Adjustable Rear Lower Control Arms designed specifically for 2002+ MINI models, including the One, Cooper, Cooper S, Clubman, and Countryman. These control arms are constructed from a lightweight yet durable steel alloy and feature a striking blue-metallic finish thanks to a meticulous 3-stage powder coating process. They include a turn-buckle style adjustment mechanism for easy tuning and anti-dust pillow ball ends for a more direct driving feel without sacrificing comfort.

• Lightweight and Durable: Made from steel alloy, ensuring a strong yet light component.
• Anti-Dust Pillow Ball Ends: Provides a direct driving feel with improved durability.
• Customizable Finish: Blue-metallic powder coat with a 3-stage process for enhanced appearance and protection.
• Easy Adjustment: Turn-buckle style center adjustment for straightforward camber or toe modifications.
• Versatile Fitment: Can be used to adjust either camber or toe, with the option to use two sets for complete rear suspension tuning.
• 1-Year Warranty: Manufacturer's warranty against defects for peace of mind.

Applications:

• Fits 2002+ MINI models including R50, R52, R53, R55, R56, R57, R58, R59, R60, and R61.

For BMW E30, Z3, E21, and 2002 models, upgrading to adjustable rear trailing arm bushings from manufacturers like Powerflex offers both improved performance and the ability to fine-tune suspension alignment. These bushings are designed to replace the factory rubber bushings, which can degrade over time and lead to imprecise handling.

Key Features and Benefits:

• Adjustable Alignment: These adjustable rear trailing arm bushings allow you to modify rear toe and camber settings. This is crucial for fine-tuning the suspension for different driving styles, especially if the car is used in motorsport applications like track days or autocross, or if the car has been lowered and needs suspension corrections.
• Superior Handling: By significantly reducing the play in the rear trailing arms, these bushings improve the car’s handling dynamics. They keep the rear suspension more rigid during acceleration, braking, and cornering, resulting in sharper, more predictable handling.
• Polyurethane Durability: Unlike the OEM rubber bushings, which wear out over time due to heat, road grime, and chemicals, these adjustable bushings are made of durable polyurethane. This material resists aging, cracking, and wear, ensuring consistent performance over a longer period.
• Reduced Deflection: Adjustable polyurethane bushings limit suspension deflection, allowing the vehicle to maintain optimal suspension geometry under load. This improves cornering performance and reduces body roll.
• Longer Service Life: Polyurethane bushings are known for their longevity compared to rubber bushings, offering a "fit and forget" solution for car owners who want reduced maintenance and better overall reliability.

Installation and Adjustment:

• Direct Fit Replacement: These bushings are designed as a direct replacement for the stock rubber bushings, offering the same fitment while adding adjustability. No major modifications are typically required, making installation easier for those familiar with suspension work.
• Alignment Precision: Once installed, these bushings allow precise adjustments to the suspension alignment, which is ideal for correcting issues that arise from modifications like lowering the vehicle or installing performance suspension components.

Ideal for:

• BMW E30 (3 Series)
• BMW Z3
• BMW E21 (3 Series)
• BMW 2002

These adjustable rear trailing arm bushings are perfect for enthusiasts looking for more control over their vehicle’s alignment and handling, whether for street driving or performance applications. They offer a great balance of increased performance, durability, and adjustability without sacrificing daily driving comfort.

The Powerflex Non-M Rear Lower Arm Rear Bushing for the BMW E39 5 Series, specifically designed for a 12mm fitting, is an excellent performance enhancement for the vehicle's rear suspension system. By replacing the factory rubber bushings with high-performance polyurethane, this bushing offers numerous advantages for improved handling and stability.

Key Benefits:

1. Enhanced Suspension Performance: The stiffer polyurethane material reduces flex and unwanted movement in the rear lower arm, resulting in improved handling characteristics. This upgrade enhances cornering stability, allowing for more confident driving, especially in dynamic situations.

2. Long-lasting Durability: Unlike factory rubber bushings, which can deteriorate over time, these polyurethane bushings are engineered to withstand extreme conditions. They resist wear from oil, heat, and road debris, ensuring long-lasting performance and reliability.

3. Improved Driver Feedback: The firmer bushing design allows for better road feel and steering response, giving drivers a more connected experience with the vehicle. This leads to enhanced control during cornering and a more engaging driving experience.

4. Simple Installation: Designed for a direct fit into the BMW E39 5 Series lower arm, these bushings require no modifications for installation. This ease of fitment makes it a straightforward upgrade for enthusiasts and DIYers alike.

5. Versatile Use: Whether for daily driving or spirited performance applications, these bushings help optimize the rear suspension setup, improving tire contact with the road and enhancing overall performance.

This upgrade is ideal for BMW E39 5 Series owners who want to enhance their vehicle's handling capabilities and stability. The Powerflex Non-M Rear Lower Arm Rear Bushing is a reliable choice for improving the performance of the rear suspension system, making it suitable for various driving conditions and styles.

The Powerflex Front Lower Control Arm Bushings for the BMW F85 X5 M and F86 X6 M are engineered to enhance the performance and dynamics of the front suspension. By replacing the factory rubber bushings with high-quality polyurethane, these bushings offer significant improvements in handling, stability, and durability.

Key Benefits:

1. Improved Handling Dynamics: The stiffer polyurethane material minimizes flex in the control arm, which enhances steering response and cornering stability. This upgrade allows for more precise handling, helping drivers navigate turns with greater confidence and control.

2. Exceptional Durability: Powerflex bushings are designed to withstand harsh driving conditions and resist wear from heat, oil, and road debris. Unlike traditional rubber bushings, which can deteriorate over time, these polyurethane bushings maintain their integrity and performance over a longer lifespan.

3. Enhanced Road Feedback: The firmer bushings provide better feedback to the driver, improving the overall driving experience. This enhanced connection between the vehicle and the road translates to increased confidence during spirited driving or challenging road conditions.

4. Easy Installation: Designed specifically for the F85 X5 M and F86 X6 M models, these bushings are a direct fit for the existing control arm mounts. This ensures a straightforward installation process without the need for modifications, making it a suitable upgrade for both professionals and DIY enthusiasts.

5. Versatile Performance: Whether used for everyday driving or high-performance applications, these bushings optimize the front suspension geometry, improving tire contact with the road and enhancing overall vehicle handling.

This upgrade is perfect for BMW F85 X5 M and F86 X6 M owners looking to boost their vehicle's front suspension performance and responsiveness. The Powerflex Front Lower Control Arm Bushings provide a reliable solution for enhancing handling, stability, and overall driving enjoyment, making them ideal for various driving styles and conditions.

Rear trailing arm bushings serve the key purpose of keeping rear suspension triangulated and the vehicle moving where it's directed to. Though failure prone, even factory-fresh OEM rubber bushings allow for deflection, causing suspension geometry changes on hard launches, over bumps in the road, and during cornering. This deflection results in clunking in the rear end, a “rear steer” feeling, and uneven tire wear.

Powerflex polyurethane rear trailing arm bushings are firmer than OEM bushings, resulting in a reduction of deflection that causes these suspension angle changes, improving handling over bumps and with a proper alignment, extending tire wear.Engineered to perform, Powerflex performance polyurethane differential bushings offer a supreme level of control, while still providing enough comfort for the street, with advanced polyurethane that reduces NVH that often accompanies lesser bushings. Expect improved acceleration response, more direct shifting feel and overall improved drivetrain composure with Powerflex performance polyurethane bushings.

Poweflex is a leading manufacturer of aftermarket suspension bushings. Using state of the art design and manufacturing, all replacement bushings are engineered to out-perform and out-last the ones that came in the car. Each line of bushings is meticulously tested and then re-tested to ensure perfect fitment and enduring quality through the life of the vehicle. A full lifetime warranty backs every one of their products and demonstrates the level of confidence and commitment Powerflex has to their customers. 

Control arms, and their integrated ball joints, are some of the most crucial components on a BMW suspension. The control arms literally control the wheel and suspension as they go through their range of motions. A faulty or worn control arm or ball joint is a very dangerous and potentially life-threatening problem so make sure they are inspected and replaced at regular intervals. For a street-driven car we advise yearly inspection and a full replacement every 3-4 years. For track-driven cars these should be inspected before every event and replaced every two years.

This control arm is an aftermarket OEM alternative part that comes with a 1-year warranty. They use the same designs as the original BMW parts on your car so they meet OEM standards for fitment and operation. We have compared these parts to the Genuine BMW and OEM brands and found few differences. This package is an unbeatable money-saving bundle to restore your E34's precise handling and steering. We also offer all of the OE or OEM brands if you are more comfortable with those levels of quality and performance or are planning to track or autocross your car (the cast components of the aftermarket kit will not be as good as the OEM parts on the track).

The aftermarket arm has the bushing pre-installed. The OEM and BMW arms include the bushing but it must be pressed into the arm by a qualified technician.

This item fits the following BMWs:
1989-1995 E34 BMW 525i 530i 535i 540i (Sedan and Touring)