BMW Internal Engine Parts for BMW 3 Series E30 (1984-1991)

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Rebuilding your engine or giving your cylinder head an overhaul? Internal engine components covers parts that are located within the engine block and cylinder head. Examples include: timing chains and tensioners, rocker arms, rod bolts and studs, head bolts, valve springs, connecting rods, and more. These are Genuine BMW engine parts, performance upgrades, or approved aftermarket brands that have a long track record of reliability and quality.

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Kolbenschmidt - Corporate Logo
T#:341713
Part#: 11241284849
In Stock
$ 77.11

This product was last offered at the strikethrough price on
02-20-2026

$ 67.99 USD
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$ 67.99 USD
Free Shipping on orders $49 and up
Standard bore - 45mm Set of 8 connecting rod bearings for 4 cylinders/connecting rods. 6cyl, V8, & V12 engines will require additional sets to overhaul all connecting rod bearings.
Kolbenschmidt - Corporate Logo
T#:12919
Part#: 11211706847
In Stock
$ 110.29 USD
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$ 110.29 USD
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These are the "Yellow" main bearing shells for many BMW 4 and 6 cylinder engines. The size is 60.00mm. Set includes bearings for 6 cylinder cars. 4 cylinder cars get 2 spare bearing sets.

KS Kolbenshmidt designs and produces internal parts for gasoline and diesel engines and is an OEM choice for many automakers. Both increased power handling and reduced fuel consumption are the motivating factors behind this company and they continue to innovate every day.

This item fits the following BMWs:
1990-1991 E30 BMW 318i 318is 318ic
1984-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix
1992-1998 E36 BMW 318i 318is 318ti 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
1989-1990 E34 BMW 525i
1997-2003 E39 BMW 525i 528i 530i
2004-2005 E60 BMW 525i 530i
2000-2006 E53 BMW X5 3.0i
2004-2006 E83 BMW X3 2.5i X3 3.0i
1997-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Roadster M Coupe
2003-2006 E85 BMW Z4 2.5i Z4 3.0i - M54
2006-2008 E85 BMW Z4 M Roadster M Coupe
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ACL - Corporate Logo
T#:34114212
Part#: 4B1568H-STD
In Stock
$ 118.99 USD
Free Shipping on orders $49 and up

Introducing the BMW S14B20, S14B23, and S14B25 Race Series High-Performance Con Rod Bearing Set by Automotive Components Limited. Elevate your BMW's performance with these precision-engineered con rod bearings, specifically designed for performance BMW engines.

Key Features:

Premium Quality: Crafted with the utmost precision and durability, this con rod bearing set ensures high performance and reliability for your BMW. Race Series Design: Engineered to meet the demands of race applications, these bearings are well-suited for high-performance driving scenarios. Enhanced Engine Protection: The bearings provide essential protection for your engine components, ensuring their longevity even under extreme conditions. Perfect Fit: Designed to seamlessly fit the BMW S14 engine, these bearings are a direct replacement for your stock components. Improved Performance: Experience enhanced engine performance and responsiveness, making it ideal for racing and high-performance driving. Upgrade your BMW with the Race Series High-Performance Con Rod Bearing Set from Automotive Components Limited. Enhance your vehicle's performance and enjoy peace of mind knowing your engine is protected by top-quality components.

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ACL - Corporate Logo
T#:26771713
Part#: 6B1490H-STD
In Stock
$ 156.99 USD
Free Shipping on orders $49 and up
The ACL BMW M20/M50/M52/M54 Engine Standard Size High Performance Rod Bearing Set represents a specialized enhancement tailored to enhance the durability and reliability of BMW M20, M50, M52, and M54 engines. Engineered with meticulous precision, these rod bearings deliver improved performance and resilience, especially under rigorous conditions. Crafted with precision and employing premium materials, they guarantee exceptional strength and extended lifespan. As such, they are the ideal solution for enthusiasts and professional drivers aiming to enhance the performance and longevity of their BMW engines.
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Kolbenschmidt - Corporate Logo
T#:49335130
Part#: 11311716138
In Stock at Vendor
New Item
$ 234.18

This product was last offered at the strikethrough price on
07-15-2026

$ 215.74 USD
Free Shipping on orders $49 and up
$ 215.74 USD
Free Shipping on orders $49 and up
The camshaft has a critical job that impacts engine performance and efficiency. As the camshaft spins, the cam lobes open and close intake and exhaust valves, which is vital to the engine's operation. If the lobes become worn or damaged, the engine will suffer drastically. It is imperative to replace the camshaft when damaged or when wear occurs to prevent costly repair bills and to ensure the engine is operating smoothly and efficiently.
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Kolbenschmidt - Corporate Logo
T#:28271149
Part#: 11241284552
Special Order: No Guaranteed ETA
$ 44.99 USD
Free Shipping on orders $49 and up

Kolbenschmidt (KS) rod bearing sets are engineered to deliver exceptional performance and reliability, making them an ideal choice for demanding automotive applications. These sets are designed to provide maximum load-bearing capacity, ensuring optimal engine function under heavy loads and high-stress conditions. The use of advanced materials and coatings contributes to anti-seize properties, reducing friction and wear for extended durability.

Manufactured with precision, KS rod bearing sets feature aluminum-tin sliding material combined with an innovative aluminum-zinc-bismuth alloy. This alloy, with bismuth replacing lead, enhances performance while meeting modern environmental standards. The manufacturing process involves casting aluminum strips on-site, followed by carefully coordinated rolling and annealing processes to create composite materials with superior strength and reliability.

One of the standout features of KS rod bearing sets is their innovative coatings, which play a crucial role in ensuring optimal running-in behavior and long-term continuous operation with minimal wear. These coatings range from galvanic films applied electrochemically to electro-physically deposited sputter layers in a high vacuum, as well as synthetic anti-friction coatings. This comprehensive approach to surface treatments enhances performance and longevity, making KS rod bearing sets a top choice for OEM applications.

Features:

Original Equipment Manufacturer (OEM) quality Maximum Load-Bearing Capacity for heavy-duty use Low Wear and Friction for extended service life Advanced Surface Coatings for optimal performance and durability Upgrade your engine's reliability and performance with Kolbenschmidt rod bearing sets, trusted by automotive enthusiasts and professionals worldwide.

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Kolbenschmidt - Corporate Logo
T#:594829
Part#: 11210666100
Back Ordered
$ 79.99

This product was last offered at the strikethrough price on
05-07-2026

$ 77.99 USD
Free Shipping
$ 77.99 USD
Free Shipping
Kolbenschmidt - Corporate Logo
T#:4744851
Part#: 11241278209
Ships in 6 Business Days
$ 18.99

This product was last offered at the strikethrough price on
07-15-2026

$ 17.30 USD
Free Shipping on orders $49 and up
$ 17.30 USD
Free Shipping on orders $49 and up
Recommended to be replaced anytime engine is being overhauled.

ACL - Corporate Logo
T#:48677225
Part#: 4B1568H-.25
Special Order: No Guaranteed ETA
$ 118.99 USD
Free Shipping on orders $49 and up
Introducing the BMW S14B20, S14B23, and S14B25 Race Series High-Performance Con Rod Bearing Set by Automotive Components Limited. Elevate your BMW's performance with these precision-engineered con rod bearings, specifically designed for performance BMW engines.
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