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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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Bav Auto Crankshaft Pulley Holding Tool

For Dual-VANOS "TU" Engines Only

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T#:580404

Part#: B8800094

Ships on Jan 29, 2027

Sale - Save 10% $ 184.99

This product was last offered at the strikethrough price on
11-07-2026

$ 166.49 USD

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Sale - Save 10%

$ 184.99

This product was last offered at the strikethrough price on
11-07-2026

$ 166.49 USD

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Bav Auto's Crankshaft Pulley Holding Tool enables you to remove your crankshaft nut/bolt with ease - we recommend this tool if you intend on replacing timing chains, oil pump chains, leaking crankshaft seals, etc.

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Bavarian Autosport Crankshaft Holding Tool - BMW

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T#:580450

Part#: B8800145

In Stock

Sale - Save 20% $ 79.99

This product was last offered at the strikethrough price on
11-07-2026

$ 63.99 USD

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Sale - Save 20%

$ 79.99

This product was last offered at the strikethrough price on
11-07-2026

$ 63.99 USD

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Makes removal of crankshaft hub nut/bolt much easier. A must-have for replacing timing chains, oil pump chains, leaking crankshaft seals and more.

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

T#:403644

Part#: SP1534HKSTDS54

Ships on Dec 10, 2026

$ 399.00 USD

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$ 399.00 USD

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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

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OEM INA Engine Timing Chain - M50, M52, M54, S50, S52

T#:42301980

Part#: ZC0255

Ships in 2 Business Days

$ 41.99 USD

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$ 41.99 USD

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Preserve the performance and longevity of your BMW with the OEM INA Engine Timing Chain. Timing chains stretch over time causing sluggish performance, a check engine light or even a misfire. Replace yours today!

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Cat Cams Camshaft Set - 288/280 12.75mm/12.50mm Lift - E46 M3 With R...

T#:4414885

Part#: 1301805KIT

Special Order: No Guaranteed ETA

$ 4,372.99 USD

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$ 4,372.99 USD

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Made in Belgium, Cat Cams offer great performance at a reasonable price. Cat Cam offers cams in most popular enthusiast upgrade specs to ensure there is a option for what ever your power goal is. The included rocker arm kit consist of: - 24x "CAT031" rocker arm, steel billet, coated - 1x oil connector bridge - rocker arms with 0.5mm oil jet hole towards the cam/follower contact area - rocker arm shafts need to be drilled at each rocker arm (in the groove already present) - rocker arm shafts need to be drilled at oil bridge connector (no need to make extra groove, connector has internal groove) - intake rocker arm shaft needs front plug to close - intake rocker arm shaft has no oil feed so an oil bridge is required to connect the intake/exhaust rocker arm shafts *Please note that the factory cams ave a pressure regulator valve that needs to be removed and installed in the new cams*

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Rein M50 M52 Piston Ring Set - Priced Each - 11251437077 - E36, E46, ...

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T#:379819

Part#: 11251437077

Ships in 4 Business Days

$ 31.99 USD

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$ 31.99 USD

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Standard bore replacement piston rings

Rein Exhaust Valve - E34, E36, E39, E46, Z3

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T#:379738

Part#: 11341739823

Ships on Dec 1, 2026

$ 20.99 USD

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$ 20.99 USD

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Replacement exhaust valve

Cat Cams M52TU B28 Hot Street Camshaft Set

T#:578587

Part#: 1304406

Special Order: No Guaranteed ETA

$ 1,642.99 USD

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$ 1,642.99 USD

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Made in Belgium, Cat Cams offer great performance at a reasonable price. Cat Cam offers cams in most popular enthusiast upgrade specs to ensure there is a option for what ever your power goal is.

OEM INA Hydraulic Lifter - BMW M5X S5X M62 S62

We Price Match - Give Us A Call or Chat!

T#:360996

Part#: 11321748884

In Stock

$ 19.99 USD

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$ 19.99 USD

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Stock replacement hydraulic valve lifter for the M52, M54 and S50 S52 engines. These lifter buckets can last 150,000+ miles but then they no longer fit on the valve stem correctly and a ticking or knocking noise can result. If the lifter is no longer seated correctly, it can lead to the valve not opening correctly. Replacement is straight-forward but requires special tools for working with the camshafts. This item fits the following BMWs:
1995-1998 E36 BMW 323is 323ic 328i 328is 328ic M3
1997-2003 E39 BMW 525i 528i 530i M5
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
2004-2005 E60 BMW 525i 530i
2004-2005 E83 BMW X3 2.5i X3 3.0i
2000-2006 E53 BMW X5 3.0i
1996-2002 E36/7 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
1998-2000 E36/7 BMW M Roadster M Coupe

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Rein M54 S54 O-Ring Seal - 12141748398 - E46, E39, E60, E83, E53 ...

Cam sensor - intake or exhaust side

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T#:12463

Part#: 12141748398

In Stock

$ 4.99

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

$ 2.75 USD

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$ 2.75 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 M54 Piston Ring - Priced Per Piston - 11257506252 - E46, E39, E8...

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T#:591606

Part#: 11257506252

Back Ordered

$ 53.99

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

$ 48.99 USD

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$ 48.99 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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Cat Cams M52TU B28 Turbo Conversion Camshaft Set

T#:25838979

Part#: 1304402

Special Order: No Guaranteed ETA

$ 1,642.99 USD

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$ 1,642.99 USD

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Cat Cams M52TU B28 Sport Camshaft Set

T#:578586

Part#: 1304405

Special Order: No Guaranteed ETA

$ 1,642.99 USD

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$ 1,642.99 USD

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Made in Belgium, Cat Cams offer great performance at a reasonable price. Cat Cam offers cams in most popular enthusiast upgrade specs to ensure there is a option for what ever your power goal is.

OEM INA Engine Oil Pump Chain - E36, E46 ,Z3 , Z4

T#:42301987

Part#: ZC0128

Ships in 7 Business Days

$ 13.99 USD

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$ 13.99 USD

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Keep your BMW’s heart pumping strong, use the INA Oil Pump Chain to replace your stetched and worn out oil pump chain to ensure your engines oiling system is operating at peak performance.

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