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

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Turner Motorsport has everything you need to upgrade your BMW through our stages of performance or to keep your car in peak condition with our range of the latest in proven OEM cooling parts. Upgrade your cooling system and engine performance with the selections below to give your BMW a performance and reliability advantage.

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Active Autowerke Rotrex Traction Fluid - 1 Liter

T#:57616348

Part#: RTF-1L

Ships in 4 Business Days

7% off MSRP $ 140.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 130.00 USD

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7% off MSRP

$ 140.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 130.00 USD

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Rotrex superchargers utilize a unique traction drive system that sets it apart from other centrifugal-style superchargers. For best performance, Rotrex recommends replacing this fluid every 50,000 miles. This bottle of traction fluid is plenty enough for one supercharger service (typically 750ml).

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E46 M3 Heavy Duty Aluminum Expansion Tank Kit & Performance Ignition ...

Our Doorbuster deals are in limited supply at these prices. Get yours while they're in stock! Can't find the perfect bundle? Call or chat with us to build a custom one. 10X Entries For Our Spin To Win Sweepstakes!

T#:59954889

Part#: 008682LAKT

In Stock

Sale - Save 28% $ 902.52

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

$ 649.00 USD

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Sale - Save 28%

$ 902.52

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

$ 649.00 USD

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The last expansion tank you'll ever need! Upgrade to durable aluminum construction and leave failure-prone plastic behind & everything needed for a performance ignition service including NGK spark plugs and Turner ignition coils!

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BMW | Screw

T#:57231520

Part#: 07119901299

In Stock

$ 2.99 USD

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$ 2.99 USD

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M8x16

Radium - Split-Flow Flex Fuel Sensor Adapter

T#:53290958

Part#: 20-0589

In Stock at Vendor

5% off MSRP $ 99.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 94.99 USD

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5% off MSRP

$ 99.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 94.99 USD

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SEG Automotive Alternator - SEG Automotive 0124.525.588 - 12317541694...

T#:54851984

Part#: 12317541694

Ships in 2 Business Days

$ 521.99

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

$ 470.99 USD

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$ 470.99 USD

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SEG Automotive Alternator - SEG Automotive 0124.515.223 - 12317519618...

T#:54851980

Part#: 12317519618

Ships on Dec 8, 2026

$ 503.99

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

$ 500.99 USD

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$ 500.99 USD

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Meistersatz S54 Valve Cover Gasket Set - 11127832034 - E46 M3 ...

T#:57580040

Part#: 11127832034

Ships in 4 Business Days

$ 162.99 USD

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$ 162.99 USD

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Tackle cylinder head service head-on and safeguard your engine’s performance with complete confidence using this valve stem seal kit from Meistersatz.

Meistersatz Oil Sensor O-Ring - 12611744292 - 1, 3, 4, 5, 6, 7 Series...

T#:60139555

Part#: 12611744292

Ships in 4 Business Days

$ 4.99 USD

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$ 4.99 USD

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M9 X 1.25 BMW 328 E46 Rod Bolt Kit

T#:54139644

Part#: 301-6022

Ships on Dec 1, 2026

20% off MSRP $ 19.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 15.99 USD

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20% off MSRP

$ 19.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 15.99 USD

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Engineered from proprietary ARP2000® alloy, these M9 x 1.25 fasteners provide the massive clamping force needed to keep the rod journals perfectly round and seated, even when bouncing off the rev limiter lap after lap.

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SEG Automotive New 150A Alternator - 0124.525.561 - E21, E30, E36, E4...

T#:58965212

Part#: 0124.525.561

Ships on Dec 8, 2026

$ 487.99 USD

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$ 487.99 USD

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SEG Automotive, the company behind Bosch's starter motor and generator business, builds this brand-new 150-amp alternator with a freewheel pulley that smooths out belt loads for a quieter, longer-lasting accessory drive.

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SEG Automotive New 120A Alternator - 0124.515.052 - E46, E39 525i 530...

T#:58965210

Part#: 0124.515.052

Ships on Dec 8, 2026

$ 485.99 USD

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$ 485.99 USD

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A strong charging system keeps everything from your ignition to your stereo working at its best, and a failing alternator can undermine all of it.

SEG Automotive New Alternator - 0124.525.523 - E46 325i 325Ci 330Ci, ...

T#:58965213

Part#: 0124.525.523

Ships on Dec 8, 2026

$ 495.99 USD

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$ 495.99 USD

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Your BMW's charging system powers everything from ignition to infotainment, so a weak alternator affects the whole car.

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