BMW Chassis Reinforcement Kits & Parts for BMW Z3 (1996-2002)

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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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Genuine BMW E36, Z3 Strut Tower Reinforcement Plates (Pair)
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Genuine BMW - Corporate Logo
T#:338358
Part#: 31312489795K
In Stock
$ 63.99

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01-07-2026

Starting at $ 63.12 USD
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Starting at $ 63.12 USD
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The shock towers on the E36 and Z3 are notoriously weak. Under normal driving conditions with a stock, fresh suspension it is unlikely that you will ever have a problem. But with an upgraded street or race suspension with firm springs much of the energy from pounding the road is transmitted to the thin sheet metal in the strut tower. This pounding will cause the tower to deform or even crack. Look for 'mushrooming' or deformity around the holes for the three mounting studs at the top of the strut tower. The sheetmetal around the holes should really be flat and square. Poor shocks or stiff suspensions will actually cause this sheetmetal to pop up.

These factory BMW reinforcement plates will help disperse the energy and save you from costly repairs in the future. A strut brace also helps to prevent this but these plates are designed to reinforce the strut tower from the bottom. The install over your strut mount or camber plate and simply add thickness (strength) to the strut tower. They can be sandwiched in place and do not require welding. BMW part number 31312489795

This item fits the following BMWs:
1992-1998 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1997-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Roadster M Coupe. Note: some Z3 models already come from the factory with these plates.
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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 40% $ 83.99

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

$ 50.39 USD
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Sale - Save 40%
$ 83.99

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

$ 50.39 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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E36 Front Subframe Reinforcement Kit
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Turner Motorsport - Corporate Logo
T#:3642
Part#: TDR3675301
In Stock
Sale - Save 56% $ 79.99

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

$ 35.48 USD
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Sale - Save 56%
$ 79.99

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

$ 35.48 USD
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Made in the USA The motor mount area on a subframe is one of those easily-forgotton areas that may be hiding a serious problem. The subframe on the E36 has a gusset ('ear') welded on for the motor mounts. These gussets take the stress of the motor mount as the engine torques (more upgrades = more torque = more stress). Worn motor mounts only transfer more stress to the subframe. Unfortunately, the gusset is not well-reinforced from the factory and cracks can develop along the welds and the gusset begins to collapse. A total failure of the guesset will shift your engine to the side and forward, taking out many other components along the way and leading to a very costly repair.

The next time you replace the motor mounts, oil pan gasket, checking your oil pump nut, or any other time you drop the front subframe, you should install these reinforcements. This kit comes with steel reinforcing plates that are welded to the underside of the guesset as well as plates to close off the bottom of the gusset for extra strength. Instructions included (or see the link below).

Click Here for Installation Instructions.

This item fits the following BMWs:
1992-1998 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic 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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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

Genuine BMW E36 X-Brace Trim Cross Reinforcement
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Genuine BMW - Corporate Logo
T#:12599
Part#: 51718410212
Ships in 3 Business Days
4% off MSRP $ 749.99

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

$ 720.99 USD
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4% off MSRP
$ 749.99

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

$ 720.99 USD
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Original BMW chassis reinforcement developed for the special M3 LTW (Lightweight) model. This tubular-steel part connects the front subframe to the body and gives the car a more solid feel with less flex. Every convertible and Roadster model uses a similar design to address inherent chassis flex in the front of the car. Fits all E36 and Z3 chassis BMWs. 

By adding this Genuine BMW Motorsport cross brace, you'll dramatically reduce that flex and movement in the front half of the body on your E36. This is a must-have on any BMW E36 that has an upgraded suspension, larger sway bars, is driven aggressively or sees ANY amount of track time. The Xbrace is a factory BMW Motorsport part, so design and fit are both great and the installation is straight forward and easy. Perhaps best of all is the low price compared to the impact the Motorsport X-brace has on the E36 chassis. Does not come with any needed hardware for installation.

We also offer the E36 x-brace with the required hardware Click Here
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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 Front Axle Hex Bolt With Washer 31311136465
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Genuine BMW - Corporate Logo
T#:7730
Part#: 31311136465
Ships in 1-3 days
$ 7.99 USD
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Genuine BMW Hex Bolt With Washer - M12X20
This item fits the following BMW Chassis:
E36 M3,E85 Z4M,E34,E36,E85 Z4,E86 Z4


Genuine BMW Fit Bolt - 07119905853 - E36,E85,E36 M3,E85 Z4M
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Genuine BMW - Corporate Logo
T#:6401
Part#: 07119905853
Ships in 1-3 days
14% off MSRP $ 15.81

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

$ 13.57 USD
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14% off MSRP
$ 15.81

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

$ 13.57 USD
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Ensure precise fitment for your BMW with the Genuine BMW Fit Bolt - 07119905853, compatible with E36, E85, E36 M3, and E85 Z4M models. Crafted to BMW's exact specifications, this bolt guarantees optimal performance and reliability. Whether you're replacing worn-out bolts or conducting maintenance, trust Genuine BMW quality to keep your vehicle running smoothly. Invest in the Genuine BMW Fit Bolt for a seamless fit and peace of mind on the road.
  • Genuine BMW quality assurance
  • Compatible with various BMW models
  • Ensures precise fitment
  • Optimal performance and reliability
  • Essential for maintenance and repairs


Genuine BMW Fit Bolt
This item fits the following BMW Chassis:
E36 M3,E85 Z4M,E36,E85 Z4,E86 Z4

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Front Strut Mount Gasket - E36, E38, Z3
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Genuine BMW - Corporate Logo
T#:15491
Part#: 31331094288
In Stock
$ 3.99 USD
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GENUINE BMW WASHER-GASKET
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
Free Shipping on orders $49 and up
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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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


Genuine BMW Hex Bolt - 07119900402 - E36,E46,E85
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Genuine BMW - Corporate Logo
T#:21651
Part#: 07119900402
In Stock
$ 5.11 USD
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Genuine BMW Hex Bolt
This item fits the following BMW Chassis:
E36 M3,E46 M3,E85 Z4M,E36,E46,E85 Z4,E86 Z4

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
05-03-2026

$ 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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Rear Shock Mount Reinforcement Plate - Priced Each - E30 E36 E46 Z3 ...
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2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:598534
Part#: 51718413359
In Stock
$ 12.99 USD
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Discover the Turner Motorsport URO Rear Shock Mount Reinforcement Plate, individually priced for E30, E36, E46, and Z3 BMW models. This mounting plate provides essential support at the rear shock mounting point, enhancing stability and durability. Engineered by URO, renowned for quality auto parts, this reinforcement plate is designed to address and prevent issues related to the rear shock mounting, ensuring a reliable and secure connection for a variety of BMW models.

  • Individually priced for cost-effective customization.
  • Enhances support at the rear shock mounting point.
  • Designed for E30, E36, E46, and Z3 BMW models.
  • URO quality ensures durability and reliability.
  • Addresses and prevents issues related to rear shock mounting.

Upgrade your BMW's rear shock mounting system with the Turner Motorsport URO Rear Shock Mount Reinforcement Plate for increased stability and longevity.

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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
Ships in 1-3 days
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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