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BMW Internal Engine Parts for BMW 3 Series E46 (1999-2005)

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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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Piston Ring Set - Priced Each - M50 M52 Engines

T#:598529

Part#: 11251437077

In Stock

$ 38.99

This product was last offered at the strikethrough price on
10-27-2026

$ 34.99 USD

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$ 34.99 USD

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Ensure optimal engine performance in your BMW M50 M52 Engines with Turner Motorsport's Mahle Piston Ring Set. Over time, worn piston rings can lead to power loss, increased oil consumption, and white smoke from the tailpipe. When rebuilding your BMW's engine, replacing the piston rings is essential for restoring power and efficiency. Each set is priced individually, with six sets required for complete engine overhaul.

Key Benefits:

Restores engine power and efficiency
Reduces oil consumption
Prevents white smoke from the tailpipe
Compatible with M50 M52 Engines

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Kolbenschmidt Connecting Rod Bearing Set - E28, E30, E32, E34, E36, E...

T#:341713

Part#: 11241284849

Ships on Feb 16, 2027

$ 70.99 USD

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$ 70.99 USD

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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.

Main Bearing Set - M20, M42, M50, M52, M44, M54, S50, S52, S54 ...

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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Glyco Connecting Rod Bearing Set

T#:375825

Part#: 11241284849

Ships in 1 Business Day

$ 92.02

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

$ 84.66 USD

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$ 84.66 USD

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Standard bore - 45mm

Glyco "Yellow" Crankshaft Bearing Shell - Set - E28, E30, E34, E36, E...

T#:375823

Part#: 11211706847

Ships in 1-3 days

$ 136.06

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

$ 125.73 USD

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$ 125.73 USD

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Standard bore

Achilles Motorsports Performance Coated Rod Bearing Set - BMW M50 M52...

T#:1438265

Part#: 11-AM-RCRB-M50

Ships in 3 Business Days

$ 159.99 USD

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$ 159.99 USD

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Achilles Motorsports uses an extremely hi-tech Dry Film Lubricating process that will keep friction to a minimum allowing your engine to rev faster without worry while keeping oil temperature lower. Perfect for high-performance street, sprint, or endurance racing engines, this specialized coating protects vital engine bearings on dry engine starts and during extreme temperatures and high RPM operation. This specialized coating is the same process that is the choice of professional engine builders around the world, used on all NASCAR, ALMS, and Grand-Am engines. Achilles' bearings provide increased insurance against mechanical thermal breakdown compared to the OEM type bearing, showing much less wear during routine inspections. Note For high-performance and racing engines, we strongly recommend upgrading the OEM type connecting rod bolts to an ARP Connecting Rod Bolt Set to keep your bearing and caps tight even under the most extreme conditions, eliminating potential walk and bearing problems. As with all racing and performance bearings, professional installation is required. Please check all clearances as per the manufactures specifications.

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Glyco "Yellow" Crankshaft Bearing Shell - Set - E30, E36, E39, E46, E...

T#:375824

Part#: 11211706850

In Stock at Vendor

$ 126.61

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

$ 119.33 USD

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$ 119.33 USD

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59.75MM(+0.25) bore

Glyco "Green" Crankshaft Bearing Shell - Set - E39, E46, E53, E83, Z3...

T#:374671

Part#: 11211706848

Ships in 1 day

$ 194.32 USD

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$ 194.32 USD

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Standard bore

AMC Cylinder Head - Bare - E39, E46, E53, E60, E61, E83, Z3, Z4 ...

T#:19277

Part#: 11127514540

Ships on Dec 7, 2026

$ 1,869.02 USD

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$ 1,869.02 USD

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CYLINDER HEAD WITH BEARING L 11127514540 Manufactured by AMC New

AMC Cylinder Head - complete - E39, E46, E53, E60, E61, E83, Z3, Z4 ...

T#:383390

Part#: 11127514540-3

Ships on Dec 7, 2026

$ 1,562.99 USD

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$ 1,562.99 USD

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Complete cylinder head with guides, seats, valves, springs, and all neccesary hardware for installation

AMC Cylinder Head - Complete - E39, E46, E53, E60, E61, E83, Z3, Z4 ...

T#:363902

Part#: 11127514540-2

Special Order: No Guaranteed ETA

$ 1,864.99 USD

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$ 1,864.99 USD

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Complete cylinder head with guides, seats, valves, & springs

Connecting Rod Bushing - Set Of 6

T#:4744851

Part#: 11241278209

Ships in 6 Business Days

$ 18.99

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

$ 17.04 USD

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$ 17.04 USD

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Recommended to be replaced anytime engine is being overhauled.

Glyco Connecting Rod Bushing

T#:374292

Part#: 11241278209

Ships in 1 Business Day

$ 6.11 USD

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$ 6.11 USD

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Press fit into small journal of connecting rod

Glyco "White" Crankshaft Bearing Shell - Set - E28, E30, E34, E36, E3...

T#:374670

Part#: 11211706849

Back Ordered

$ 172.99 USD

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$ 172.99 USD

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Standard bore

Glyco "White" Crankshaft Bearing Shell - Set - E28, E30, E34, E36, E3...

T#:374672

Part#: 11211706852

Back Ordered

$ 108.99 USD

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$ 108.99 USD

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59.75MM(+0.25) bore

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