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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S54 Valve Adjustment Shim Set - With Tools

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T#:401664

Part#: VSK4KT2

In Stock

Sale - Save 15% $ 148.29

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

$ 126.05 USD

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$ 148.29

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

$ 126.05 USD

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Proper valve lash adjustment is critical for longevity and performance. If your S54 is due for valve adjustment maintenance you can do it yourself with this kit, saving hundreds of dollars in labor charges.

Includes

Shim set
Installation tool #83300493743
16 Blade Feeler gauge set

BMW recommends S54 valve inspection and adjustment every 30k miles.

*Click here for valve adjustment instructions*

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E46 M3 / MZ4 Rod Bearing Overhaul Kit

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T#:392550

Part#: S54RBPDK

In Stock

$ 455.99

This product was last offered at the strikethrough price on
08-26-2026

Starting at $ 453.97 USD

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Starting at $ 453.97 USD

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Replacing the rod bearings requires mechanical knowledge and skill, a clean workspace, and several specialist tools. Our preferred procedure is to leave the engine in the car but remove the front subframe. The engine must be supported from above with an engine brace. Removing the front subframe involves disconnecting the control arms and steering rack and steering column. The oil pan can then be removed and you can access the connecting rods and bearings. Replacing the rod bearings themselves is straightforward but patience and forethought will be extremely helpful. In addition to analyzing the severity of the rod bearing wear, the crankshaft must also be inspected closely for damage. Rod bearings that have been severely worn may have damaged the crankshaft (requiring replacement or machining).

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S54 Valve Adjustment Kit - With gaskets

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T#:582218

Part#: 83300493743

In Stock

Sale - Save 10% $ 255.18

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

$ 229.66 USD

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$ 255.18

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

$ 229.66 USD

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BMW recommends valve adjustments every 30k miles on your S54-equipped BMW. We have all the parts you will need to do the job in one discounted package for your BMW E46 M3, Z3, or Z4! Kit includes: 11127832034 x 1 - Valve Cover Gasket 11127831271 x 6 - Spark Plug Hole Gasket 11121437395 x 2 - Valve Cover Seal Washer Grommet 11127830972 x 13 - Valve Cover Nut Grommet VSK4 Wiseco x 1 - Valve Shim Set 83300493743 x 1 - Valve Shim Tool *Click here for valve adjustment instructions* This item fits the following BMWs: 2001-2006 E46 BMW M3, M3 Convertible2001-2002 Z3 BMW M Roadster M Coupe2006-2008 Z4 BMW Z4 M Roadster M Coupe

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S54 Valve Adjustment Kit w/ Wiseco Shims - E46 M3, Z3M, Z4M

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T#:582210

Part#: S54WVALVESHIMKT

Ships in 1 Business Day

Sale - Save 10% $ 227.40

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

$ 204.66 USD

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$ 227.40

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

$ 204.66 USD

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S5X/M5X/M44/M20/M10- WPC Treated Rod Bearing Set - (Standard/Red Shel...

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T#:395066

Part#: 11241284849WPC

In Stock

Sale - Save 25% $ 188.99

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

$ 141.74 USD

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Sale - Save 25%

$ 188.99

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

$ 141.74 USD

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These WPC-treated bearings are the best we have seen! WPC is a shot-peening treatment at a microscopic level. It's perfect for sensitive surfaces like bearings. The WPC treatment removes imperfections and high spots, while creating a surface that retains oil better than the original surface. This greatly reduces friction. The bearings in this kit are original equipment KS bearings that are sent to WPC for treatment. The treated bearings are stronger with less metal fatigue and less friction than buying off-the-shelf bearings from the dealer.

This item fits the following BMWs:
1984-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is 325ix
1992-1998 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
1982-1988 E28 BMW 528e
1989-1995 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 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Roadster M Coupe
2003-2005 Z4 BMW Z4 2.5i Z4 3.0i

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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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S54/S5X/M5X/M20/M44 WPC Treated BMW Engine Crankshaft Main Bearing Se...

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T#:585720

Part#: 11211706847WPCKT

In Stock

Sale - Save 5% $ 250.99

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

$ 238.44 USD

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Sale - Save 5%

$ 250.99

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

$ 238.44 USD

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What's better than using new crank bearings in your next engine build? WPC-treated bearings! What is WPC, you ask? WPC is a surface treatment that reduces friction and adds strength - two improvements that benefit internal engine components. Ultra-fine particles are fired at the surface at very high speeds, like shot-peening - but much, much smaller. The parts come out smoother and stronger due to thermal discharge. The two largest enemies of any high-performance engine are heat and friction - and WPC has found a way to reduce both. What are you waiting for? Use WPC-treated bearings on your next engine build or crank service!

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JE Pistons Forged Piston Set Of 6 - 87.5mm Bore - 11.5:1 CR - E46 M3 ...

T#:599660

Part#: 297118

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$ 1,324.99 USD

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$ 1,324.99 USD

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Features: Crown requires no deburring or preparation 2618 T6 high tensile forged aluminum New asymetrical FSR forging! State of the art asymmetrical skirt technology reduces friction and mass while providing a more rigid and durable platform In this environment, higher boost levels or heavy nitrous usage necessitate JE's wrought 2618 alloy FSR pistons include offset pins for quiet operation Pistons feature new Smooth Finished Crown process for excellent flame travel 1.0 x 1.2 x 2.8mm ring widths .827 x 2.250 straight wall carbon steel wrist pin provided Pin fitting, rings and wire locks included Specifications: Bore (in): 3.445 Bore (mm): 87.50 Top Compression Ring Thickness: 0.0400 Second Compression Ring Thickness: 0.0480 Oil Ring Thickness: 0.111 Forging Type: FSR Volume (cc): -13.80 Series: JE Pistons Piston Head Type: Inv Dome/Dish Pin Diameter (IN): 0.827 Compression Height: 1.271 Make: BMW Wrist Pin Style - floating or press fit: Floating Wall Type: CHAMFERED Wall Thickness (IN): 0.150 Ringset Part Number: JG1001-3445 Ring Brand: ProSeal Ringset Included: Yes Retainer Thickness: 0.063 Retainer Lock Style: Wire Lock Retainer Lock Part Number: 827-063-MW Retainer Diameter (IN): 0.827 Replacement Single Piston: 297118S Replaced By: 289132 Piston Pin Inside Diameter: 0.527 Piston Pin Material: 5115 LOW CARBON STEEL, CASE HARDENED Piston Material: 2618 Piston Pin Length (IN): 2.250 Piston Avg Wt: 332 Pin Offset: Yes Pin Brand: JE Pistons Pin Part Number: 827-2250-15-51C Pin Included: Yes Pin Diameter (mm): 21.00 Oil Rail Support Included: No Deck Clearance: -0.008

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S54 Camshaft Installation Kit

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T#:599963

Part#: 1131783634KT1

In Stock

Sale - Save 3% $ 307.99

This product was last offered at the strikethrough price on
06-15-2026

$ 297.40 USD

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$ 307.99

This product was last offered at the strikethrough price on
06-15-2026

$ 297.40 USD

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Includes needed gaskets and hardware for installing a new camshaft set.

S54 Valve Adjustment Kit - E46 M3, Z3M, Z4M

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T#:401675

Part#: S54VADJKT1

In Stock

Sale - Save 10% $ 416.35

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

$ 374.72 USD

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Sale - Save 10%

$ 416.35

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

$ 374.72 USD

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BMW recommends valve adjustment every 30,000 miles on the S54 engine.This valve adjustment kit includes every thing needed to to a proper valve adjustment on the S54 engine.

Kit includes

Wiseco valve shims
Elring valve cover gasket set
BMW Valve shim Installation tool
Valve shim feeler gauge set
Castrol TWS Edge Professional Engine Oil - 6 Quarts
Mann Oil Filter Kit
Oil pan drain plug

Please note the the included feeler gauge set allows you to stack feeler blades to get a more precise adjustment

*Click here for valve adjustment instructions*

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

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JE Pistons Set Of 6 Pistons

T#:5122283

Part#: 297119

Back Ordered

$ 1,324.99 USD

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$ 1,324.99 USD

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JE Pistons are specifically engineered for extreme applications up to, and including, professional competition. In this environment, higher compression ratios, extreme boost levels and heavy nitrous usage necessitate the higher tensile strength 2618 aluminum alloy found in every JE Piston. *Application Specific Forgings for an Optimized, Uniform Crown Thickness *Contact Reduction Groove to Minimize Frictional Drag *Accumulator Groove for Increased Top Ring Stability and Sealing *CNC-Machined Side Relief with Lower Support Band for Additional Skirt Strength *Honed Pin Bores, Double Pressure Fed Pin Oilers and Wire Locks Included *JE ProSeal Piston Rings are included with your JE Pistons

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

Sub-Categories

S54 Valve Adjustment Shim Set - With Tools

E46 M3 / MZ4 Rod Bearing Overhaul Kit

S54 Valve Adjustment Kit - With gaskets

S54 Valve Adjustment Kit w/ Wiseco Shims - E46 M3, Z3M, Z4M

S5X/M5X/M44/M20/M10- WPC Treated Rod Bearing Set - (Standard/Red Shel...

Bav Auto Crankshaft Pulley Holding Tool

S54/S5X/M5X/M20/M44 WPC Treated BMW Engine Crankshaft Main Bearing Se...

JE Pistons Forged Piston Set Of 6 - 87.5mm Bore - 11.5:1 CR - E46 M3 ...

S54 Camshaft Installation Kit

S54 Valve Adjustment Kit - E46 M3, Z3M, Z4M

JE Pistons Set Of 6 Pistons

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