Home
Suspension
Chassis Reinforcement Kits & Parts

BMW Chassis Reinforcement Kits & Parts for BMW 3 Series E46 (1999-2005)

As much of an "Ultimate Driving Machine" it is, many BMW models unfortunately suffer from weak points in the chassis. Over the years we have uncovered many weak or failure-prone areas in the chassis and have developed our own reinforcing solutions for them. And we continue to be the leading experts on BMW chassis reinforcing. Failures can come from a number, or combination, of causes: improper maintenance, age and mileage, poor design, environmental factors, poor repair work, and over-stressing modifications. The longer you let your car go without repairing or reinforcing these areas, the closer it gets to crumbling apart. Our chassis reinforcement kits are designed to first identify potential weak points and then strengthen and reinforce the existing design.

Most of our kits are not labor intensive although welding is usually required. If you suspect your chassis may have structural problems we recommend taking it to a well-known bodyshop or restoration shop. (find out who your local BMW dealer uses - we sell many of our kits to dealer-authorized repair shops). Making the preventative fix simple and effective is better than a long and complicated repair after the failure. Our kits are not usually used for fixing existing damage (only your body shop can determine the correct course of action). But our kits have been proven under extreme conditions on racetracks around the world to prevent many of the costly - and dangerous - chassis problems.

Sub-Categories

Braces (3)

Sort By:

Front And Rear Suspension Refresh Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:15777299

Part#: 33172282484-KT

Ships on Mar 8, 2027

Sale - Save 5% $ 2,847.01

This product was last offered at the strikethrough price on
06-18-2026

$ 2,706.88 USD

Add to Wish List

Qty

Sale - Save 5%

$ 2,847.01

This product was last offered at the strikethrough price on
06-18-2026

$ 2,706.88 USD

Add to Wish List

Symptoms of a worn suspension include a loose and imprecise feel to the steering, excessive shaking through the steering wheel, or sounds like squeaking, grinding or clunking. This kit will not only help address these issues but is designed to have superior performance compared to stock, and extend suspension life. Level 3 includes: 2 front control arms 2 front Polyurethane control arm bushings 4 sway bar end links 2 tie rod assemblies 2 strut mounts 2 strut mount reinforcement plates 2 Heavy Duty ECS rear shock mount reinforcement plates 2 rear upper control arm bushings 2 camber arm bushings 4 lower trailing arm ball joint 1 differential bushing 4 rear subframe bushings 4 ECS RTAB limiters 2 trailing arm bushings 2 rear shock mounts 2 rear shock mount gaskets

Show More Show Less

Front And Rear Suspension Refresh Kit - Level 3

10X Entries Into Our F80 M3 Sweepstakes

T#:15710780

Part#: 33526772864KT

Ships on Dec 10, 2026

$ 1,420.99

This product was last offered at the strikethrough price on
05-02-2026

$ 1,274.99 USD

Add to Wish List

Qty

$ 1,274.99 USD

Add to Wish List

Symptoms of a worn suspension include a loose and imprecise feel to the steering, excessive shaking through the steering wheel, or sounds like squeaking, grinding or clunking. This kit will not only help address these issues but is designed to have superior performance compared to stock, and extend suspension life. Level 3 includes: 2 front control arms 2 control arm bushings 2 sway bar end links 2 tie rod assemblies 2 strut mounts 2 strut mount reinforcement plates 2 Heavy Duty ECS rear shock mount reinforcement plates 2 rear upper control arm bushings 2 camber arm bushings 4 rear upper and lower trailing arm ball joint upgrade 1 differential bushing 4 rear subframe bushings 2 trailing arm bushings 2 rear shock mounts 2 rear shock mount gaskets 4 ECS RTAB limiters

Show More Show Less

Karbonius E46 M3 / 3-Series Carbon FIber Strut Brace

T#:28104800

Part#: E46SB01CF

In Stock

Starting at $ 1,195.00 USD

Add to Wish List

Starting at $ 1,195.00 USD

Add to Wish List

A strut tower bar is one of the most common and effective upgrades in a vehicle. With the installation of a strut brace, the body gets added structural strength, preventing tower flex and alignment changes during sporty driving or while at the race track. Improve your E46-Chassis BMW with the Karbonius Carbon Strut Brace! Karbonius Composites was inspired by the popular, but no longer available BMW Performance strut bar to create a version of their own. They have designed an extremely strong and lightweight brace that not only adds strength and stability, but also a spectacular eye-catching look. The carbon strut bar is manufactured in prepreg carbon fiber and cured in aluminum mold in an autoclave; while the strut tower caps are 5-axis CNC machined, and includes titanium strut tower nuts. Installation Instructions Product Details: Fits all E46 and M3 Offered in standard high gloss, 2x2 carbon weave Natural anodized aluminum strut tower caps 6 titanium nuts included Very light, only 1100g weight Perfect fitment and easy installation 100% carbon fiber prepreg Cured in aluminum mold and autoclave Controlled break zone Exclusive and numbered piece 2-year warranty NOTE: All pieces are numbered to guarantee authenticity and origin.

Show More Show Less

Suspension Reinforcement Kit

For coupe models only

10X Entries Into Our F80 M3 Sweepstakes

T#:5416754

Part#: 51717036781TMSKT

In Stock

Sale - Save 16% $ 265.00

This product was last offered at the strikethrough price on
04-03-2026

$ 221.81 USD

Add to Wish List

Qty

Sale - Save 16%

$ 265.00

This product was last offered at the strikethrough price on
04-03-2026

$ 221.81 USD

Add to Wish List

Includes RTAB limiter, rear shock tower reinforcement plates and BMW Strut tower plates. If you already upgraded your suspension but are looking for the finishing touch, this kit is what you need. The BMW front strut mount reinforcement plates reduce the risk of the shock tower mushrooming and cracking. The rear shock mount reinforcement plates reduce the risk of the rear shock mount area tearing and deforming. The Delrin rear trailing arm bushing limiters reduce the movement that the RTAB's can make resulting in a tighter rear suspension and with less moment prolongs the bushing life.

Show More Show Less

Suspension Reinforcement Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:15677561

Part#: 51717036781-KT

In Stock

Sale - Save 16% $ 265.00

This product was last offered at the strikethrough price on
04-03-2026

$ 221.81 USD

Add to Wish List

Qty

Sale - Save 16%

$ 265.00

This product was last offered at the strikethrough price on
04-03-2026

$ 221.81 USD

Add to Wish List

If you already upgraded your suspension but are looking for the finishing touch, this kit is what you need. The BMW front strut mount reinforcement plates reduce the risk of the shock tower mushrooming and cracking. The ECS rear shock mount reinforcement plates reduce the risk of the rear shock mount area tearing and deforming. The ECS Delrin rear trailing arm bushing limiters reduce the movement that the RTAB's can make resulting in a tighter rear suspension and with less moment prolongs the bushing life.

Project Cars

SELECT YOUR BMW

BMW Chassis Reinforcement Kits & Parts for BMW 3 Series E46 (1999-2005)

Sub-Categories

Front And Rear Suspension Refresh Kit

Front And Rear Suspension Refresh Kit - Level 3

Karbonius E46 M3 / 3-Series Carbon FIber Strut Brace

Suspension Reinforcement Kit

Suspension Reinforcement Kit

Select Vehicle

Purpose

Category

Brand

Price

Special Offers

Shipping

Narrow Results