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Rein 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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Rein Piston Rings - Set - Single Piston - E36, Z3

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T#:591603

Part#: 11251405783

In Stock at Vendor

Sale - Save 5% $ 43.99

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

$ 41.79 USD

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$ 43.99

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

$ 41.79 USD

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Replace your worn out piston rings with OE replacements - 86.415mm

Rein Piston Rings - Set - Single Piston

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T#:592808

Part#: 11251247917

Ships in 4 Business Days

Sale - Save 5% $ 36.99

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

$ 35.14 USD

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$ 36.99

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

$ 35.14 USD

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Replace your worn out piston rings with OE replacements - 85.065mm

Rein Piston Ring - Priced Per Piston - E28, E30, E34, E36

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T#:379806

Part#: 11251713192

Ships in 3 Business Days

Sale - Save 5% $ 30.99

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

$ 29.44 USD

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This product was last offered at the strikethrough price on
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$ 29.44 USD

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For use on stock pistons, will need 6 sets to replace all piston rings in the engine

Rein Piston Ring Set

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T#:379819

Part#: 11251437077

Ships in 4 Business Days

Sale - Save 5% $ 31.99

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

$ 30.39 USD

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$ 31.99

This product was last offered at the strikethrough price on
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$ 30.39 USD

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Standard bore replacement piston rings

Rein Piston Ring Set - Priced Per Piston

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T#:592811

Part#: 11251713178

Ships in 4 Business Days

Sale - Save 5% $ 28.99

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

$ 27.54 USD

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$ 28.99

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$ 27.54 USD

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Replace your worn rings - 84.000mm

Rein Piston Rings - Set - Single Piston - E30, E36

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T#:591604

Part#: 11251727461

Ships in 4 Business Days

Sale - Save 5% $ 31.99

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

$ 30.39 USD

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$ 31.99

This product was last offered at the strikethrough price on
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$ 30.39 USD

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Replace your worn out piston rings with OE replacements - 84.000mm

Aluminum Cylinder Head Bolt Set

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T#:594302

Part#: 11120392547

In Stock

Sale - Save 39% $ 12.35

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

$ 7.50 USD

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Sale - Save 39%

$ 12.35

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

$ 7.50 USD

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If you remove your cylinder head replacement head bolts are a must. These bolts are designed to be torqued down and not reused.

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

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T#:12463

Part#: 12141748398

In Stock

Sale - Save 81% $ 4.99

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

$ 0.96 USD

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$ 4.99

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

$ 0.96 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.

Rein Exhaust Valve - Sold Each - E28, E30, E34

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T#:584424

Part#: 11341708896

In Stock

Sale - Save 9% $ 18.35

This product was last offered at the strikethrough price on
05-14-2026

$ 16.65 USD

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Sale - Save 9%

$ 18.35

This product was last offered at the strikethrough price on
05-14-2026

$ 16.65 USD

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Replace your worn valves

Rein Alusil Piston Ring Repair Kit - E38, E39, E53

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T#:591608

Part#: 11259071606

Ships in 4 Business Days

Sale - Save 5% $ 37.99

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

$ 36.09 USD

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$ 37.99

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

$ 36.09 USD

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Set of rings for one piston

OEM Rein Rocker Arm Shaft Plug - E28 E30 E34

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T#:583592

Part#: 11331264519

In Stock at Vendor

Sale - Save 5% $ 6.11

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

$ 5.80 USD

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$ 6.11

This product was last offered at the strikethrough price on
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$ 5.80 USD

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This is an OEM Rein replacement rocker arm shaft plug, also referred to by BMW as a Blind Plug. This plug connects to the end of the rocker arm shafts. 4 required per vehicle. Replace your old plugs to keep everything properly sealed.

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

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T#:591606

Part#: 11257506252

Ships in 4 Business Days

Sale - Save 5% $ 48.99

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

$ 46.54 USD

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$ 48.99

This product was last offered at the strikethrough price on
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$ 46.54 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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Rein Exhaust Valve - E34, E36, E39, E46, Z3

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T#:379738

Part#: 11341739823

Ships on Jul 20, 2026

Sale - Save 5% $ 20.99

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

$ 19.94 USD

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$ 20.99

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

$ 19.94 USD

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Replacement exhaust valve

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