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

Clear BMW chassis

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.

Sub-Categories

Sort By:

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

Add to Wish List

Qty

$ 34.99 USD

Add to Wish List

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

Show More Show Less

OEM Head Bolt Set - M50 M52 S50 S52

T#:1551

Part#: 11121721938

In Stock

$ 20.94 USD

Add to Wish List

Qty

$ 20.94 USD

Add to Wish List

Head Bolt Set for all M50 engines with a steel engine block.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

This item fits the following BMWs:
992-1998 E36 BMW 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1991-1995 E34 BMW 525i
1997-1998 E39 BMW 528i
1998-2000 Z3 BMW M Roadster M Roadster

Show More Show Less

M52, M54, S50, S52 H-Beam Connecting Rods - Eagle

T#:640320

Part#: CRS5313B63D

In Stock

$ 619.99

This product was last offered at the strikethrough price on
11-04-2026

$ 611.99 USD

Add to Wish List

Qty

$ 611.99 USD

Add to Wish List

Eagle is synonymous with exceptional quality and unwavering commitment to customer satisfaction, which has cultivated a loyal and satisfied customer base. This dedication has propelled Eagle to unparalleled growth throughout the years, expanding their product range to include crankshafts and a wider selection of connecting rods. Key Benefits: Proven Excellence: Eagle's reputation as the largest and most respected aftermarket connecting rod and crank manufacturer underscores their commitment to excellence. Continuous Advancements: Eagle's relentless pursuit of perfection is evident in their continuous design enhancements, materials innovation, and manufacturing techniques, ensuring their products are always at the forefront of performance. Lightweight Design: Eagle prioritizes making their products lighter, enhancing your engine's performance while maintaining structural integrity. Strength and Durability: Every Eagle connecting rod is engineered for superior strength, ensuring your engine can handle high-performance demands without compromise. Efficient Manufacturing: Eagle's dedication to efficiency guarantees that each connecting rod is manufactured with precision and attention to detail, resulting in top-notch quality. Diverse Applications: With a diverse product range, Eagle ensures compatibility with a wide variety of engines, making their connecting rods a versatile choice for automotive enthusiasts.

Show More Show Less

BE Bearings Connecting Rod Bearing Upgrade Set - SP1534F - BMW S54 ...

T#:403644

Part#: SP1534HKSTDS54

Ships on Dec 14, 2026

$ 399.00 USD

Add to Wish List

Qty

$ 399.00 USD

Add to Wish List

NOTE: These bearings are now sold as SP1534F which features a new and improved silver oxide coating that is stronger and more durable! Designed and manufactured by Clevite to BE Bearing specifications. These bearings replace the factory BMW rod bearings. The original BMW bearings have too little clearance, which leads to premature bearing wear and can cause early engine failure. Furthermore, the factory BMW bearings are made from tin-aluminum which are 5-times harder than a softer lead-copper bearing design. A softer bearing is better for your engine and more tolerant of foreign particles suspended in your oil. These BE Bearings feature a state-of-the-art Clevite Tri-Metal design with the Clevite Tri-Armor(tm) coating. Lead-copper design for greater durability and easy tracking with oil analysis like Blackstone (recommended). Designed with extra clearance to "fix" the BMW rod bearing design flaw. Designed for use with factory 10W60 weight oils. Tri-Armor coated for low conditions during cold start Ideal for start-stop vehicles Applicable for BMW engines S54 Standard size Sold as complete set (6-cylinders) Fits the following BMWs: 2002-2006 E46 BMW M3 S54 2002-2003 Z3 BMW M Coupe, M Roadster S54 2006-2008 Z4 BMW M Coupe, M Roadster S54

Show More Show Less

M52TU/M54 Aluminum Block Head Bolt Set

T#:1560

Part#: 11121740065

Ships in 1 Business Day

$ 78.99

This product was last offered at the strikethrough price on
08-13-2026

$ 67.12 USD

Add to Wish List

Qty

$ 67.12 USD

Add to Wish List

Head Bolt set for M52TU and M54 engines with aluminum block.

If you drive a European vehicle, chances are high your vehicle came equipped with one or more Victor Reinz gaskets. Choose OE quality VR gaskets and seals and do the job right the first time.

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
1997-2003 E39 BMW 525i 528i 530i
2004-2005 E60 BMW 525i 525xi 530i 530xi
2004-2005 E83 BMW X3 2.5i X3 3.0i
2000-2006 E53 BMW X5 3.0i
1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
2003-2005 E85 BMW Z4 2.5i Z4 3.0i

Show More Show Less

Head Bolt Set - S54 - E46 M3, MZ3 S54, Z4 M

T#:25748

Part#: 11127831862

In Stock at Vendor

$ 51.98 USD

Add to Wish List

Qty

$ 51.98 USD

Add to Wish List

Head Bolt Set for the S54 engine.

If you drive a European vehicle, chances are high your vehicle came equipped with one or more Victor Reinz gaskets. Choose OE quality VR gaskets and seals and do the job right the first time.

This item fits the following BMWs:
2001-2006 E46 BMW M3
2001-2002 Z3 BMW Z3 M Roadster M Coupe
2006-2008 E85 BMW Z4 M Roadster M Coupe

Show More Show Less

Victor Reinz O-Ring Seal

Cam sensor - intake or exhaust side

T#:369725

Part#: 12141748398

Ships in 7 Business Days

$ 2.99 USD

Add to Wish List

Qty

$ 2.99 USD

Add to Wish List

Always replace the o-ring when replacing sensor

Select Vehicle

Purpose

Brand

View All Brands

Project Cars

SELECT YOUR BMW

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

Sub-Categories

Piston Ring Set - Priced Each - M50 M52 Engines

Key Benefits:

OEM Head Bolt Set - M50 M52 S50 S52

M52, M54, S50, S52 H-Beam Connecting Rods - Eagle

BE Bearings Connecting Rod Bearing Upgrade Set - SP1534F - BMW S54 ...

M52TU/M54 Aluminum Block Head Bolt Set

Head Bolt Set - S54 - E46 M3, MZ3 S54, Z4 M

Victor Reinz O-Ring Seal

Select Vehicle

Purpose

Category

Brand

Price

Special Offers

Shipping

Narrow Results