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

Bav Auto High-Performance Ignition Coil - N20 N52 N54 N55 S55 ...

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:578618

Part#: 5005

In Stock

Sale - Save 30% $ 29.99

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

$ 20.99 USD

Add to Wish List

Qty

Sale - Save 30%

$ 29.99

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

$ 20.99 USD

Add to Wish List

A simple yet effective upgrade, these Bav Auto High-Performance Ignition Coils feature modified core windings that offer increased firepower and promote a faster, more efficient burn. The result is greater low-end torque and increased horsepower in the mid to top-end. When used in a properly functioning engine, a noticeable difference can be felt. In addition to better torque and horsepower, fuel economy is also improved! These coils come with new spark plug boots. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability.

Show More Show Less

Bav Auto High-Performance Ignition Coil - M62 M73 M52 M54 S52 S62 ...

For vehicles with production date up to 09/2002

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:579671

Part#: 5002

In Stock

Sale - Save 30% $ 29.99

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

$ 20.99 USD

Add to Wish List

Qty

Sale - Save 30%

$ 29.99

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

$ 20.99 USD

Add to Wish List

A simple yet effective upgrade, these Bav Auto High-Performance Ignition Coils feature modified core windings that offer increased firepower and promote a faster, more efficient burn. The result is greater low-end torque and increased horsepower in the mid to top-end. When used in a properly functioning engine, a noticeable difference can be felt. In addition to better torque and horsepower, fuel economy is also improved! These coils come with new spark plug boots. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

Show More Show Less

High-Performance Ignition Coil - Set Of 6

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!
Earn 5% back in Turner Rewards on orders placed 10/28-10/31. Redeem 11/27-12/1. Terms & conditions apply
Earn 5% back in Turner Rewards on orders placed 10/28-10/31. Redeem 11/27-12/1. Terms & conditions apply

T#:36337177

Part#: B50056KT

In Stock

Sale - Save 30% $ 179.99

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

$ 125.96 USD

Add to Wish List

Qty

Sale - Save 30%

$ 179.99

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

$ 125.96 USD

Add to Wish List

Enhance your BMW's performance with the upgraded BAV Ignition Coil, designed to boost firepower and optimize engine efficiency. These coils boast modified core windings for a faster, more efficient burn, resulting in increased torque at lower RPMs and heightened horsepower in the upper range. While improvements depend on your engine's condition, these coils ensure noticeable enhancements in performance and potential fuel economy benefits.

Product Benefits:

Improved engine firepower and efficiency
Increased torque at lower RPMs
Enhanced horsepower in higher ranges
Potential improvement in fuel economy
Set of six for complete BMW Cooper replacement

Show More Show Less

New Alternator - 120A

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:25042543

Part#: 12317501690

In Stock

Sale - Save 20% $ 211.99

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

$ 169.59 USD

Add to Wish List

Qty

Sale - Save 20%

$ 211.99

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

$ 169.59 USD

Add to Wish List

Bav Auto Lower Timing Chain Sprocket - M50 M52 M52TU M54 S50 S52 ...

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:17871153

Part#: 11211719984

In Stock

Sale - Save 30% $ 63.99

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

$ 44.79 USD

Add to Wish List

Qty

Sale - Save 30%

$ 63.99

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

$ 44.79 USD

Add to Wish List

This lower timing chain sprocket is located behind the crank pulley, directly on the crankshaft.

Upper Timing Chain Tensioner

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:599825

Part#: 11311738700

In Stock

Sale - Save 30% $ 49.99

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

$ 34.99 USD

Add to Wish List

Qty

Sale - Save 30%

$ 49.99

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

$ 34.99 USD

Add to Wish List

Bav Auto Ignition Coil - N20 N52 N55 N54 N62 S55

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:578619

Part#: 12137571643A

In Stock

Sale - Save 30% $ 37.99

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

$ 26.59 USD

Add to Wish List

Qty

Sale - Save 30%

$ 37.99

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

$ 26.59 USD

Add to Wish List

Restores your engines smooth operation with new ignition coils from Bav Auto! Boot included with coil. Same as 12131712219, 12130148594, 12130390064, 12137594938, 12137551049, 12137562744, 12137571643, 12138647689, 12137594937, 12137571643. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

Show More Show Less

Alternator - 120amp

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:25042542

Part#: 12317831436

In Stock

Sale - Save 25% $ 222.99

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

$ 167.24 USD

Add to Wish List

Qty

Sale - Save 25%

$ 222.99

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

$ 167.24 USD

Add to Wish List

Bav Auto Crankcase Pressure Regulator Valve - BMW M52 M54

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:640207

Part#: 11617501566

In Stock

Sale - Save 30% $ 32.99

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

$ 23.09 USD

Add to Wish List

Qty

Sale - Save 30%

$ 32.99

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

$ 23.09 USD

Add to Wish List

BMW has an ongoing issue with oil separators freezing in cold weather if driving is done before the vehicle is fully warmed up. There is often a howling noise followed by numerous oil leaks. The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate. Replace this and all the other components of the oil separator system to prevent damage to all the aspects of your engine. As long as you have everything off, you can rest assured that new parts will last and be reliable. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

Show More Show Less

Innovate LC-2 Wideband O2 Controller Kit

T#:28836410

Part#: 38770

In Stock at Vendor

$ 247.99 USD

Add to Wish List

Qty

$ 247.99 USD

Add to Wish List

Features & Benefits:

Two configurable linear 0-5V analog outputs Ability to calibrate O2 sensors for maximum accuracy Includes LC-2 controller and Bosch wideband O2 sensor Comes with a program cable, manual, and a 10 ft. sensor cable Includes a 1-inch mild steel exhaust bung Innovate MTS serial in/out capability Integrated dual-color status LED (green/red) Patented DirectDigital™ wideband sensor control Positive lock connectors for all connections Real-time display data on screen or with the powerful LogWorks software Range:

AFR (Air-Fuel Ratio) range from 7.4:1 to 22.4:1 (0.5 to 1.5 lambda)

Show More Show Less

Bavarian Autosport M52/M54/S52 Exact-Fit Rubber Vanos Line

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:1105923

Part#: 000932LA01-02

In Stock

Sale - Save 5% $ 65.99

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

$ 62.69 USD

Add to Wish List

Qty

Sale - Save 5%

$ 65.99

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

$ 62.69 USD

Add to Wish List

We have seen so many M52/M54/S52 Vanos line failures at the track that we have to offer you a solution. The factory line is prone to failure due to the OEM hard-line - this rubber line alleviates the issues imposed by the factory design and enables you to worry less about your Vanos system. We trust ECS Tuning's Exact-Fit Stainless Steel lines for several different applications, and their M52/M54/S52 Vanos line is no exception. Bavarian Autosport's M52/M54/S52 Exact-Fit Rubber Vanos Line offers several benefits over OEM. Not is it they more durable and reliable OEM, but it is also easier to install, and significantly less expensive than the factory BMW Vanos line (11361705532) or other alternatives available on the market. If you're factory Vanos line hasn't failed yet, we still recommend replacing yours with Bavarian Autorsport's Exact Fit Rubber Vanos Line M52/M54/S52 to avoid eminent future failure.

Show More Show Less

Morimoto Standalone Can-Bus Wiring Harness - H4 / 9003 - Priced Each ...

T#:54388428

Part#: H240

Ships on Nov 30, 2026

$ 21.99 USD

Add to Wish List

Qty

$ 21.99 USD

Add to Wish List

Blue WG38 Gen V Ultra-Gate 38 - 14PSI

T#:22591972

Part#: TS-0551-1011

In Stock at Vendor

10% off MSRP $ 430.99

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

$ 387.99 USD

Add to Wish List

Qty

10% off MSRP

$ 430.99

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

$ 387.99 USD

Add to Wish List

The Gen V WG38 Ultra-Gate 38 external wastegate is your cost-effective, high-performance solution. This 38mm external wastegate is meticulously designed for hassle-free bolt-on applications that make use of the 2-bolt flange.

Show More Show Less

MTX-D: Ethanol Content % And Fuel Temperature Gauge

T#:22558994

Part#: INN3904

In Stock at Vendor

$ 313.99 USD

Add to Wish List

Qty

$ 313.99 USD

Add to Wish List

Introducing the Innovate Motorsports MTX Digital Series "Dual Function" Gauges – now available! These 2 1/16" (52mm) gauges come with interchangeable faceplates and bezels, locking connectors for simplified installation, and MTS serial connections for seamless integration with other Innovate devices for data logging.

DISPLAY RANGE

Ethanol Content %: 0-100%
Temperature: -40-257 °F (-40-125°C)

KEY FEATURES

Ethanol Content
Error reporting for ethanol content sensor (Digital Display)
Fuel Temperature
Customizable exterior LED display
Programmable exterior LED color options
Selectable unit of measure in °F or °C
Programmable fuel temperature warning (outer LED)
2-Configurable analog outputs
Ethanol Content: 0v = 0%, 5v = 100%
Fuel Temperature: 0v = -40 °F, 5v = 257 °F (-40-125°C)

MTX-D: Ethanol Content Percentage & Fuel Temp Gauge Kit includes Gauge (Black Faceplate, Black Bezel), Silver Bezel & White Faceplate, Harness, Program Cable (Serial), Ethanol Content Sensor, Quick Start Installation Guide.

Please note that this is a universal fitment gauge, and installation may vary depending on the vehicle.

Show More Show Less

Oil Separator Hose - E46, Z4

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:579880

Part#: 55080

In Stock

Sale - Save 30% $ 24.99

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

$ 17.49 USD

Add to Wish List

Qty

Sale - Save 30%

$ 24.99

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

$ 17.49 USD

Add to Wish List

Cold climate version for extra insulation! Fits all E46 and Z4 chassis equipped with an M54 engine.

Timing Chain - Upper

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:17871154

Part#: 11311432177

In Stock

Sale - Save 30% $ 27.99

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

$ 19.59 USD

Add to Wish List

Qty

Sale - Save 30%

$ 27.99

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

$ 19.59 USD

Add to Wish List

Bav Auto Crankcase Ventilation Return Hose - E46 E39 E60 Z3

For vehicles with production date from 01/2000

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:638072

Part#: 11617504536

In Stock

Sale - Save 30% $ 26.99

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

$ 18.89 USD

Add to Wish List

Qty

Sale - Save 30%

$ 26.99

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

$ 18.89 USD

Add to Wish List

This is the BMW crankcase return line that goes from the intake manifold to the top CCV connecting hose. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

Show More Show Less

Oil Pump Chain

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:17871159

Part#: 11411401399

In Stock

Sale - Save 30% $ 17.99

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

$ 12.59 USD

Add to Wish List

Qty

Sale - Save 30%

$ 17.99

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

$ 12.59 USD

Add to Wish List

Bav Auto Upper Oil Separator Vent Tube - E36 E46 E60 E84 Z3 Z4 M54 M5...

For vehicles with production date from 01/2000

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:640502

Part#: 11617504535

In Stock

Sale - Save 30% $ 24.99

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

$ 17.49 USD

Add to Wish List

Qty

Sale - Save 30%

$ 24.99

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

$ 17.49 USD

Add to Wish List

Runs from the top of the oil separator up to rear of the intake manifold. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

Show More Show Less

Battery Tender Plus Advanced Battery Charging System

T#:49892371

Part#: BTT0210128

In Stock at Vendor

9% off MSRP $ 64.99

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

$ 58.99 USD

Add to Wish List

Qty

9% off MSRP

$ 64.99

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

$ 58.99 USD

Add to Wish List

Bosch Flow Matched EV14 Injectors - US CAR Connector (EV6) - 1300cc -...

NOT A DIRECT REPLACEMENT FOR FACTORY INJECTORS - For use with aftermarket port injectio...

T#:47679243

Part#: 501-0116

Ships in 7 Business Days

$ 884.99 USD

Add to Wish List

Qty

$ 884.99 USD

Add to Wish List

The Black Market Parts Genuine Bosch Motorsports EV14 fuel injectors featuring USCAR (EV6) connector matched and packaged in a pack of 6 units. Direct plug-in for Motiv Reflex, AIC, and Nexsys Motorsports

Show More Show Less

Project Cars

SELECT YOUR BMW

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

Sub-Categories

Bav Auto High-Performance Ignition Coil - N20 N52 N54 N55 S55 ...

Bav Auto High-Performance Ignition Coil - M62 M73 M52 M54 S52 S62 ...

High-Performance Ignition Coil - Set Of 6

New Alternator - 120A

Bav Auto Lower Timing Chain Sprocket - M50 M52 M52TU M54 S50 S52 ...

Upper Timing Chain Tensioner

Bav Auto Ignition Coil - N20 N52 N55 N54 N62 S55

Alternator - 120amp

Bav Auto Crankcase Pressure Regulator Valve - BMW M52 M54

Innovate LC-2 Wideband O2 Controller Kit

Bavarian Autosport M52/M54/S52 Exact-Fit Rubber Vanos Line

Morimoto Standalone Can-Bus Wiring Harness - H4 / 9003 - Priced Each ...

Blue WG38 Gen V Ultra-Gate 38 - 14PSI

MTX-D: Ethanol Content % And Fuel Temperature Gauge

Oil Separator Hose - E46, Z4

Timing Chain - Upper

Bav Auto Crankcase Ventilation Return Hose - E46 E39 E60 Z3

Oil Pump Chain

Bav Auto Upper Oil Separator Vent Tube - E36 E46 E60 E84 Z3 Z4 M54 M5...

Battery Tender Plus Advanced Battery Charging System

Bosch Flow Matched EV14 Injectors - US CAR Connector (EV6) - 1300cc -...

Select Vehicle

Purpose

Category

Brand

Price

Special Offers

Shipping

Narrow Results