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 - Corporate Logo
T#:25706115
Part#: MB7039AM
In Stock
13% off MSRP $ 207.00

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

$ 179.99 USD
Free Shipping on orders $49 and up
13% off MSRP
$ 207.00

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

$ 179.99 USD
Free Shipping on orders $49 and up
King - Corporate Logo
T#:25706122
Part#: CR6640SM
In Stock
13% off MSRP $ 207.99

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

$ 179.99 USD
Free Shipping on orders $49 and up
13% off MSRP
$ 207.99

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

$ 179.99 USD
Free Shipping on orders $49 and up
King - Corporate Logo
T#:16707423
Part#: CR6877XP
In Stock at Vendor
3% off MSRP $ 309.99

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

$ 300.99 USD
Free Shipping on orders $49 and up
3% off MSRP
$ 309.99

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

$ 300.99 USD
Free Shipping on orders $49 and up
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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Rein - Corporate Logo
T#:379819
Part#: 11251437077
Ships in 4 Business Days
$ 31.99 USD
Free Shipping on orders $49 and up
Standard bore replacement piston rings

King - Corporate Logo
T#:25706120
Part#: MB7039AM0.25
Ships in 7 Business Days
13% off MSRP $ 207.00

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

$ 179.99 USD
Free Shipping on orders $49 and up
13% off MSRP
$ 207.00

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

$ 179.99 USD
Free Shipping on orders $49 and up
Replace your worn out OE main bearings with King's .25 Oversize Performance S54 Main Bearing Set!
VAC Motorsports - Corporate Logo
T#:11857228
Part#: JE-FPS-M52-84-10
Ships on Dec 1, 2026
$ 1,441.99 USD
Free Shipping on orders $49 and up

Boost Your BMW's Engine with JE Pistons

Upgrade your BMW's engine with the JE Pistons Forged Piston Set designed for the M52 engine. These high-quality forged pistons feature a diameter of 84mm and a compression ratio of 10.5:1, ensuring improved performance and reliability for your BMW.

  • Enhances engine performance and reliability
  • Precision-engineered for optimal fit and function
  • High-quality forged construction ensures durability
  • Designed specifically for the M52 engine
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Rein Exhaust Valve - E34, E36, E39, E46, Z3
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379738
Part#: 11341739823
Ships on Dec 1, 2026
$ 20.99 USD
Free Shipping on orders $49 and up
Replacement exhaust valve
Rein M54 S54 O-Ring Seal - 12141748398 - E46, E39, E60, E83, E53 ...
Cam sensor - intake or exhaust side
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:12463
Part#: 12141748398
In Stock
$ 4.99

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

$ 2.75 USD
Free Shipping on orders $49 and up
$ 2.75 USD
Free Shipping on orders $49 and up
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.

Meistersatz Cylinder Head Bolt Kit - E34, E36, E39, Z3
For vehicles with production date up to 09/1998
Meistersatz - Corporate Logo
T#:1195780
Part#: 11121721938
Ships in 4 Business Days
$ 19.99 USD
Free Shipping on orders $49 and up
$ 19.99 USD
Free Shipping on orders $49 and up
Set of 14 stretch bolts for installing cylinder head

Rein - Corporate Logo
T#:591606
Part#: 11257506252
Back Ordered
$ 53.99

This product was last offered at the strikethrough price on
10-28-2026

$ 48.99 USD
Free Shipping on orders $49 and up
$ 48.99 USD
Free Shipping on orders $49 and up

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 - Corporate Logo
T#:25706111
Part#: CR6877XP0.25
Back Ordered
$ 300.99 USD
Free Shipping on orders $49 and up
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
Show More Show Less
VAC Motorsports - Corporate Logo
T#:26038609
Part#: JE-FPS-M54
Ships on Dec 1, 2026
$ 1,399.99 USD
Free Shipping on orders $49 and up