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BMW Internal Engine Parts

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

Ships in 2 Business Days

$ 37.99 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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Camshaft Timing Chain - E39 E38 E53 X5 with M62 V8 engine

T#:14505

Part#: 11311747437

In Stock

$ 62.99

This product was last offered at the strikethrough price on
03-02-2026

$ 34.43 USD

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$ 34.43 USD

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This is the timing chain that connects the 2 camshaft sprockets. The M62 V8 engine is known for issues with the timing system. Replace the timing chain on your BMW with this OEM part. We also recommend replacing guides and tensioners while replacing the chain. Sold individually. 2 per car.

IWIS is a leader in complex engine parts. Using advanced techniques in research and design allows IWIS to offer parts that not only repair but ultimately improve the way your engine runs.

This item fits the following BMWs:
1997-2003 E39 BMW 540i
1996-2001 E38 BMW 740i 740il
1996-1999 E31 BMW 840i 840ci
2000-2003 E53 BMW X5 4.4i X5 4.6is

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Oil Pump Chain - E36 E46 E34 E39 Z3 Z4

T#:14529

Part#: 11417576915

Ships in 3 Business Days

$ 45.89

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

$ 32.99 USD

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$ 32.99 USD

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This is an OEM oil pump chain for BMW's with the M50/M52/M54/S50/S52 6 cylinder engine. We recommend replacing the oil pump chain any time you remove the oil pump from the car.

IWIS is a leader in complex engine parts. Using advanced techniques in research and design allows IWIS to offer parts that not only repair but ultimately improve the way your engine runs.

This item fits the following BMWs:
1992-1998 E36 BMW 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
1991-1995 E34 BMW 525i
1997-2003 E39 BMW 525i 528i 530i
2004-2005 E60 BMW 525i 530i
2004-2005 E83 BMW X3 2.5i X3 3.0i
1996-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
1998-2000 Z3 BMW M Roadster M Coupe
2003-2006 E85 BMW Z4 2.5i Z4 3.0i

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OEM IWIS Lower Timing Chain - E36, E46, E39, Z3 E60

T#:362220

Part#: 11311432176

In Stock

$ 83.99

This product was last offered at the strikethrough price on
06-08-2026

$ 79.99 USD

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$ 79.99 USD

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IWIS is a leader in complex engine parts. Using advanced techniques in research and design allows IWIS to offer parts that not only repair, but ultimately improve the way your engine runs.

Piston Ring Repair Kit - ( 0 Size )

T#:589332

Part#: 11257566479

Ships in 3 Business Days

$ 28.99

This product was last offered at the strikethrough price on
07-23-2026

$ 24.99 USD

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$ 24.99 USD

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Stock-Size Piston Ring Set for Engine Head Repair

When it comes to engine head repair or rebuilding, this piston ring set is the perfect choice. Designed to be of stock size, it ensures a precise fit and reliable performance.

Key Details:

One set of piston rings is needed for each piston.
If your engine head contains four pistons, you'll require four sets to complete the repair.

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Oil Pump Chain - E46 M3, Z3M Z4M with S54 engine

T#:34869

Part#: 11411401399

In Stock

$ 30.99

This product was last offered at the strikethrough price on
06-19-2026

$ 29.99 USD

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$ 29.99 USD

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This is an OEM oil pump chain for BMW's with the S54 6 cylinder engine. We recommend replacing the oil pump chain any time you remove the oil pump from the car.

IWIS is a leader in complex engine parts. Using advanced techniques in research and design allows IWIS to offer parts that not only repair, but ultimately improve the way your engine runs.

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

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MINI N18 1.6L Piston - ( 0 Size ) Priced Each 081 PI 00110 000 ...

T#:13760053

Part#: 081PI00110000

Ships on Sep 1, 2026

$ 187.99 USD

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$ 187.99 USD

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MINI N18 1.6L Piston - (0 Size) Priced Each 081 PI 00110 000

A crucial component for Mini vehicles, ensuring optimal engine performance and reliability. Engineered with precision and durability, this piston is designed to withstand the demands of the N18 1.6L engine.

Genuine Mini quality guarantees reliability and longevity
Precision engineering ensures perfect fit and compatibility
Enhances engine performance for a smooth and efficient operation
Priced affordably for cost-effective maintenance

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Crankshaft to Camshafts Lower Timing Chain - E39 E38 E53 E31 ...

T#:14503

Part#: 11311741746

In Stock

$ 97.72

This product was last offered at the strikethrough price on
07-16-2026

$ 88.99 USD

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$ 88.99 USD

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This is the timing chain that connects the crankshaft to the camshafts. The M62 V8 engine is known for issues with the timing system. Replace the timing chain on your BMW with this OEM part. We also recommend replacing guides and tensioners while replacing the chain.

IWIS is a leader in complex engine parts. Using advanced techniques in research and design allows IWIS to offer parts that not only repair but ultimately improve the way your engine runs.

This item fits the following BMWs:
1997-2003 E39 BMW 540i
1996-2001 E38 BMW 740i 740il
1996-1999 E31 BMW 840i 840ci
2000-2003 E53 BMW X5 4.4i X5 4.6is

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Engine Main Bearing Set - Standard Size

T#:27638798

Part#: MB5872XP

In Stock at Vendor

$ 125.99 USD

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$ 125.99 USD

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Timing Chain - Upper

T#:362341

Part#: 11311432177

In Stock

$ 45.92 USD

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$ 45.92 USD

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This is the upper timing chain that connects the 2 camshaft sprockets on cars with the M50, M52, M54, S50 or S52 engines. If you need the lower timing chain that connects the crankshaft to the upper sprocket you can find it Here .

IWIS is a leader in complex engine parts. Using advanced techniques in research and design allows IWIS to offer parts that not only repair but ultimately improve the way your engine runs.

This item fits the following BMWs:
1992-1998 E36 BMW 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
1991-1995 E34 BMW 525i
1997-2003 E39 BMW 525i 528i 530i
2004-2005 E60 BMW 525i 530i
2004-2006 E83 BMW X3 2.5i X3 3.0i
2000-2006 E53 BMW X5 3.0i
1997-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
1997-2000 Z3 BMW Z3 M Roadster M Coupe
2003-2005 E85 BMW Z4 2.5i Z4 3.0i

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Timing Chain - Single Row

T#:578660

Part#: 11311716987

In Stock at Vendor

$ 62.99

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

$ 60.99 USD

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$ 60.99 USD

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The timing chain in any vehicle can begin to stretch and rattle over time. This is a common issue, and though BMW says it is a lifetime part, most enthusiasts decide to change them. If you need only the timing chain instead of a kit, ECS Tuning has your replacement. This is a direct fit replacement for any broken or stretched chain. A great replacement to a damaged chain or one that may have been misplaced out of a timing belt kit.

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Timing Chain - E30 E32 E34

T#:4468

Part#: 11311716986

Ships in 2 Business Days

$ 47.17 USD

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$ 47.17 USD

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This single row timing chain is used on many BMW's from 1979 on. If you are rebuilding your engine we recommend replacing the timing chain.

IWIS is a leader in complex engine parts. Using advanced techniques in research and design allows IWIS to offer parts that not only repair, but ultimately improve the way your engine runs.

This item fits the following BMWs:
1979-1983 E21 BMW 320i 323i
1984-1985 E30 BMW 318i
1979-1981 E12 BMW 528i 530i
1985-1988 E28 BMW 533i 535i 535is
1989-1995 E34 BMW 535i
1979-1989 E24 BMW 633csi 635csi
1979-1987 E23 BMW 733i 735i
1988-1993 E32 BMW 735i 735il

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Timing Chain - Oil Pump

T#:591278

Part#: 13528648731

Ships in 1-2 days

$ 39.99

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

$ 38.99 USD

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$ 38.99 USD

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MINI N12 N16 1.6L Piston W/ Rings - ( +0.25 Size ) Priced Each 081 PI...

T#:13760050

Part#: 081PI00104001

Ships on Sep 1, 2026

$ 187.99 USD

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$ 187.99 USD

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MINI N12 N16 1.6L Piston W/ Rings - ( +0.25 Size )

A high-quality piston replacement kit designed for MINI vehicles equipped with the N12 or N16 1.6L engine. Engineered to precise specifications, this piston kit includes rings and is oversized by 0.25 to accommodate engine wear. Its durable construction ensures reliable performance and longevity, while the included rings provide proper sealing for optimal engine compression. Trust this piston kit to restore engine performance and reliability in your MINI vehicle.

High-quality piston replacement kit for MINI vehicles
Designed for N12 or N16 1.6L engine
Oversized by 0.25 to accommodate engine wear
Durable construction for reliable performance
Included rings provide proper sealing for optimal engine compression

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MINI N12 N16 1.6L Piston W/ Rings - ( +0.50 Size ) Priced Each 081 PI...

T#:13760051

Part#: 081PI00104002

Ships on Sep 1, 2026

$ 203.99 USD

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$ 203.99 USD

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MINI N12 N16 1.6L Piston W/ Rings - ( +0.50 Size ) Priced Each 081 PI 00104 002 offers a premium replacement option for Mini enthusiasts seeking reliable engine performance. Crafted with precision and designed to OEM specifications, these pistons with rings ensure optimal combustion and engine efficiency. Upgrade your MINI N12 or N16 1.6L engine with these pistons for enhanced reliability and performance.

Premium replacement option for MINI engines
Precision-crafted with OEM specifications
Ensures optimal combustion and engine efficiency
Compatible with MINI N12 and N16 1.6L engines
Enhances reliability and performance

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