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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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King Performance BMW S54 Main Bearings - Std.

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T#:25706115

Part#: MB7039AM

In Stock

$ 169.99 USD

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$ 169.99 USD

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Performance Rod Bearing Set - Standard Size

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T#:4840520

Part#: CR6640XP

In Stock at Vendor

$ 163.99

This product was last offered at the strikethrough price on
05-22-2026

$ 148.99 USD

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$ 148.99 USD

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These King Performance Series bearings are recommended for performance applications. These bearings are designed for aftermarket gasoline or diesel engine rebuilding and performance engines with OE or upgraded crankshafts. These King Performance Series bearings have an improved crankshaft finish for reducing microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshafts. The bearings feature improved oil clearance to reduce wear and increase engine life, which in turn reduces operating noise, vibration, and excess oil flow.

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Rein Piston Ring Set

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T#:379819

Part#: 11251437077

Ships in 4 Business Days

$ 31.99 USD

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$ 31.99 USD

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Standard bore replacement piston rings

King Performance BMW M50 Rod Bearings - Std.

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T#:25706122

Part#: CR6640SM

In Stock

$ 178.99 USD

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$ 178.99 USD

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King BMW S54B32 3.2L Coated Performance Rod Bearing Set

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T#:16707423

Part#: CR6877XP

In Stock at Vendor

$ 300.99 USD

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$ 300.99 USD

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King's Racing Line of Performance Engine Bearings are for enthusiasts looking for an upgraded, coated connecting rod bearing to replace their OE bearings with. Constructed of a Silver base, these bearings are coated in a polymer-based coating to create a thermal barrier between your connecting rods and crankshaft. Complete Set of Bearing Shells

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King Performance BMW S54 Main Bearings - .25 Oversize

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T#:25706120

Part#: MB7039AM0.25

Ships in 7 Business Days

$ 178.99 USD

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$ 178.99 USD

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Replace your worn out OE main bearings with King's .25 Oversize Performance S54 Main Bearing Set!

Rein Exhaust Valve - E34, E36, E39, E46, Z3

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T#:379738

Part#: 11341739823

Ships on Jul 28, 2026

$ 20.99 USD

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$ 20.99 USD

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Replacement exhaust valve

OEM Rein Camshaft / Crankshaft Sensor O-Ring - Multiple BMWs ...

Cam sensor - intake or exhaust side

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T#:12463

Part#: 12141748398

In Stock

$ 4.99

This product was last offered at the strikethrough price on
06-29-2026

$ 2.75 USD

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$ 2.75 USD

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This is the o-ring used for most BMW camshaft sensors and crankshaft sensors. Although most sensors that we sell come with this o-ring at no charge, they may be the source of oil or fluid leaks.

Piston Ring - Priced Per Piston | BMW M54 3.0L Engine

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T#:591606

Part#: 11257506252

Ships in 4 Business Days

$ 48.99 USD

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$ 48.99 USD

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Piston Ring - Priced Per Piston | BMW M54 3.0L Engine is a vital component in maintaining proper compression and oil control in BMW M54 3.0L engines. Over time, piston rings experience wear from continuous movement within the cylinder bore, leading to decreased engine efficiency. Worn or damaged rings can result in excessive oil consumption, reduced performance, and visible black or blue smoke from the exhaust. Ideal for engine rebuilds, this high-quality replacement ensures optimal sealing and longevity.

Restores proper compression and oil control for improved engine performance
Reduces oil consumption and minimizes exhaust smoke
Direct-fit replacement for BMW M54 3.0L engine pistons
Manufactured from high-strength materials for durability and longevity
Essential for engine rebuilds and maintaining peak efficiency
Designed to withstand high temperatures and pressures for reliable operation

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King Performance BMW S54 Rod Bearings - Set - .025

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T#:25706111

Part#: CR6877XP0.25

Ships in 4 Business Days

$ 300.99 USD

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$ 300.99 USD

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King's Racing Line of Performance Engine Bearings are for enthusiasts looking for an upgraded, coated connecting rod bearing to replace their OE bearings with. Constructed of a tri-metal base, these bearings are coated in a polymer-based coating to create a thermal barrier between your connecting rods and crankshaft. Complete Set of Bearing Shells - .025 Oversize

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