Rein BMW Internal Engine Parts for BMW 5 Series E39 (1996-2003)

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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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Rein Piston Ring Set
Rein Piston Ring Set
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T#:379819
Part#: 11251437077
Ships Jul 22, 2025
$ 29.99 USD
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$ 29.99 USD
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Standard bore replacement piston rings
OEM Rein Camshaft / Crankshaft Sensor O-Ring - Multiple BMWs
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
$ 0.99 USD
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$ 0.99 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 - E34, E36, E39, E46, Z3
Rein Exhaust Valve - E34, E36, E39, E46, Z3
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T#:379738
Part#: 11341739823
In Stock
$ 19.99
$ 17.99 USD
Limited Qty Sale
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$ 19.99
$ 17.99 USD
Limited Qty Sale
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Replacement exhaust valve
Rein Alusil Piston Ring Repair Kit - E38, E39, E53
Rein Alusil Piston Ring Repair Kit - E38, E39, E53
For vehicles with a production date from 09/1998
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T#:591608
Part#: 11259071606
Ships Jul 22, 2025
$ 35.99 USD
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$ 35.99 USD
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Set of rings for one piston
Piston Ring - Priced Per Piston | BMW M54 3.0L Engine
Piston Ring - Priced Per Piston | BMW M54 3.0L Engine
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T#:591606
Part#: 11257506252
Ships Jul 22, 2025
$ 50.99 USD
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$ 50.99 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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