BMW Chassis Reinforcement Kits & Parts for BMW E30 M3 S14 2.3L

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Made in the USAAs 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.

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4mm Heavy Duty Rear Shock Mount Reinforcement Plate Set
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ECS - Corporate Logo
T#:376177
Part#: 002478ECS01KT
In Stock
Sale - Save 25% $ 83.99

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05-02-2026

$ 62.99 USD
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$ 83.99

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$ 62.99 USD
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A very common weak point on the 3 series BMW is the sheetmetal of the rear shock tower. The sheetmetal here is relatively thin and very susceptible to stress and fatigue. A worn out shock will bottom-out more often and this energy is transferred through the bump stop and into the metal chassis. Stiffer shocks and shock mounts also put more stress on the sheetmetal. Factor in age, mileage, and environmental conditions and it's not a surprise that we see shock tower failures often. BMW addressed this issue with reinforcements of their own but our's are thicker for additional strength. This kit mounts on top of the shock tower and can either be bolted or welded in place. Because of the shape of the rear shock tower, these do not fit cabrio/convertible cars. 
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BMW E30 Frame Rail Reinforcement Kit
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Turner Motorsport - Corporate Logo
T#:5901285
Part#: 043107LA01
In Stock
Sale - Save 25% $ 190.99

This product was last offered at the strikethrough price on
05-03-2026

$ 143.24 USD
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Sale - Save 25%
$ 190.99

This product was last offered at the strikethrough price on
05-03-2026

$ 143.24 USD
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BMW E30 Frame Rail Reinforcement Kit from Turner Motorsport addresses a critical weak point in the chassis to enhance the structural integrity of your BMW. Leveraging two decades of racing expertise, Turner Motorsport delivers performance parts that combine exceptional quality, value, and functionality. This reinforcement kit is designed to strengthen the frame rails of the E30, improving handling and durability for a more responsive driving experience.

  • Enhanced Structural Integrity: Reinforces the frame rails to address common weak points in the E30 chassis.
  • Improved Handling: Stiffens the underside of the vehicle for better road handling and stability.
  • Durable Construction: Built to withstand the demands of both street and track use.
  • Expert Design: Developed with insights from Turner Motorsport’s extensive racing experience.

This kit is essential for maintaining your BMW E30's performance and reliability over time.

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Genuine BMW Hex Bolt With Washer - 33176760336
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Genuine BMW - Corporate Logo
T#:59645
Part#: 33176760336
In Stock
12% off MSRP $ 25.16

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 22.25 USD
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12% off MSRP
$ 25.16

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 22.25 USD
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Genuine BMW HEX BOLT WITH WASHER

Genuine BMW Hex Bolt M12X1,5X90 - 33321136406 - E30,E34,E36,E30 M3 ...
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Genuine BMW - Corporate Logo
T#:60235
Part#: 33321136406
In Stock
5% off MSRP $ 22.10

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 20.99 USD
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5% off MSRP
$ 22.10

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 20.99 USD
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Genuine BMW Hex Bolt - M12X1,5X90
This item fits the following BMW Chassis:
E30 M3,E30,E34,E36


Heavy Duty Rear Sway Bar Bracket Upgrade - E30
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ECS - Corporate Logo
T#:9222692
Part#: 016965LA
In Stock
Sale - Save 25% $ 115.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 86.99 USD
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Sale - Save 25%
$ 115.99

This product was last offered at the strikethrough price on
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Starting at $ 86.99 USD
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A major upgrade over the weak stamped steel factory sway bar brackets. These are critical for those running larger, aftermarket sway bars. Includes polyurethane bushings.
E30 Complete Turner Motorsport Reinforcement Package
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Turner Motorsport - Corporate Logo
T#:338985
Part#: T30REINF
Ships on Sep 4, 2026
Sale - Save 3% $ 275.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 267.69 USD
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Sale - Save 3%
$ 275.99

This product was last offered at the strikethrough price on
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Starting at $ 267.69 USD
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There are a lot of enthusiasts still committed to the E30 3-series. For these owners, giving up their 318, 325, or M3 is out of the question. We've tried to make it harder for them to part with their cars by developing reinforcements for common weak areas of the E30 chassis. With these pieces, you can prevent a costly repair or total failure that could cost you lots of money. These are a must-have for any E30 restoration (yes, restoration is the right word these days) or even during normal suspension work. Included in this package are reinforcements for:

 

This item fits the following BMWs:
1984-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is M3

 

 

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Genuine BMW Rear Axle Hex Bolt With Washer 33176760343
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Genuine BMW - Corporate Logo
T#:13461
Part#: 33176760343
In Stock
5% off MSRP $ 8.75

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 8.27 USD
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5% off MSRP
$ 8.75

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 8.27 USD
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Genuine BMW Hex Bolt With Washer - M12X100-10.9
This item fits the following BMW Chassis:
E60 M5,E63 M6,E46 M3,E82 1M Coupe,E85 Z4M,E46,E63,E65,E82,E85 Z4,E86 Z4,E90,E92,E93,F22,F25 X3,F26 X4 X4,F30,F31,F32,F33,F34,F36

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E36, E46, Z3 Rear Shock Mount Reinforcement (Sold Each)
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Bavarian Autosport - Corporate Logo
T#:578621
Part#: B3300044
In Stock
Sale - Save 3% $ 8.99

This product was last offered at the strikethrough price on
05-03-2026

$ 8.68 USD
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Sale - Save 3%
$ 8.99

This product was last offered at the strikethrough price on
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$ 8.68 USD
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This is a direct replacement for the factory BMW rear shock mount reinforcement, as equipped by BMW on Z3 models. This also fits all E36 and E46 models as well. Turner Motorsport makes our own that are thicker but these can also do a good job of preventing cracks and deformation of the rear shock towers. Priced per reinforcement plate. Order 2 to cover both rear shock towers. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty. This item fits the following BMWs: 1992-1999 E36 BMW 318i 318is 318ti 318ic 323is 325i 325is 328i 328is M3 (not for convertible models) 1999-2006 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi M3 (not for convertible models) 1997-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Roadster M Coupe
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Genuine BMW Support Shackle - 31351127202 - E30,E30 M3
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Genuine BMW - Corporate Logo
T#:7779
Part#: 31351127202
In Stock
$ 12.99 USD
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Genuine BMW Support Shackle
This item fits the following BMW Chassis:
E30 M3,E30


Genuine BMW Pin M8X18 Zns3 - 31336765744 - E30,E34,E36,E38,E53 ...
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Genuine BMW - Corporate Logo
T#:7763
Part#: 31336765744
In Stock
$ 1.99 USD
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Genuine BMW Pin - M8X18 Zns3
This item fits the following BMW Chassis:
E30 M3,E36 M3,E34 M5,E30,E34,E36,E38,E53 X5

Genuine BMW Hex Bolt With Washer 33306760652
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Genuine BMW - Corporate Logo
T#:12732
Part#: 33306760652
In Stock
$ 7.99 USD
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GENUINE BMW HEX BOLT WITH WASHER FOR FRONT CONTROL ARM BUSHING BRACKET AND OTHER APPLICATIONS
E30, Z3 Rear Sway Bar Lower Link Reinforcement Kit
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Turner Motorsport - Corporate Logo
T#:3775
Part#: TSU3075305
In Stock
Sale - Save 60% $ 47.99

This product was last offered at the strikethrough price on
05-03-2026

$ 19.35 USD
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Sale - Save 60%
$ 47.99

This product was last offered at the strikethrough price on
05-03-2026

$ 19.35 USD
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Made in the USA This product reinforces the metal swaybar link mounting point on the rear trailing arm. The sheet metal breaks off the trailing arm due to the constant up and down loads being placed on the trailing arm from the swaybar. Problems increase when larger sway bars are used. This product eliminates the problem by thickening the sheet metal and triangulating the mounting point. A good time to install this kit would be when you are doing any rear suspension work, exhaust, or even if you are just doing a differential fluid change. This part requires welding for installation.

Click here for installation instructions.

This item fits the following BMWs:
1984-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is 325ix M3
1997-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Roadster M Coupe
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E30 M3 Front Sway Bar Reinforcement Kit
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Turner Motorsport - Corporate Logo
T#:3415
Part#: TSU3075312
In Stock
Sale - Save 76% $ 29.99

This product was last offered at the strikethrough price on
05-03-2026

$ 7.22 USD
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Sale - Save 76%
$ 29.99

This product was last offered at the strikethrough price on
05-03-2026

$ 7.22 USD
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Made in the USA Every E30 M3 that comes into our shop gets the front swaybar tab inspected. This is such a common problem but with an easy fix. If left to worsen you may be looking at an entire strut housing replacement. Fix it now with these reinforcing plates and a little welding! Not only will modified suspensions put stress on the mounts but age will reduce their strength as well. Reinforcing the swaybar mount to the strut will keep your swaybar geometry in spec and prevent a costly and ugly repair.

This item fits the following BMWs:
1987-1991 E30 BMW M3
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