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Audi B9 A4 Quattro 2.0T

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Audi B9 A4 Quattro 2.0T Engine Parts & Accessories

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MST Performance Cold Air Intake System

ES#4440481 - AD-A405 - MST Performance Cold Air Intake System - Improves throttle response, and peak power while adding a glorious and aggressive tone under the hood. - MST Performance - Audi

Improves throttle response, and peak power while adding a glorious and aggressive tone under the hood.

Brand:
MST Performance - Corporate Logo
ES#:
4440481
Mfg#:
AD-A405
Special Order: No Guaranteed ETA
$426.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Tube Plug

ES#281420 - 06H115418M - Oil Tube Plug - Keep contaminants out of your oil - Genuine Volkswagen Audi - Audi

Keep contaminants out of your oil

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
281420
Mfg#:
06H115418M
Ships in 2 Business Days
35% off MSRP

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

$12.30

This product was last offered at the strikethrough price on
08-25-2026

$7.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Lower Crankshaft Bearing - Priced Each

ES#2631743 - 06H105591KGLB - Lower Crankshaft Bearing - Priced Each - With Yellow markings - Genuine Volkswagen Audi - Audi Volkswagen

With Yellow markings

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2631743
Mfg#:
06H105591KGLB
Ships in 1-2 days
10% off MSRP

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

$51.99

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

$46.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Turbo Flange Stud - Priced Each

ES#468923 - N10730201 - Turbo Flange Stud - Priced Each - Allows the catalytic converter to bolt up to the turbocharger. M10x32 - Genuine Volkswagen Audi - Audi

Allows the catalytic converter to bolt up to the turbocharger. M10x32

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
468923
Mfg#:
N10730201
In Stock
$6.37 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Bypass Hose

ES#5341426 - 06L121081K - Coolant Bypass Hose - connects to coolant hose connector that mounts in the cylinder head - Rein - Audi

connects to coolant hose connector that mounts in the cylinder head 2X Entries Into Our F80 M3 Sweepstakes

Brand:
Rein - Corporate Logo
ES#:
5341426
Mfg#:
06L121081K
Back Ordered
Auto Notify
$45.99 USD
Free Shipping
on orders $49 and up

In-Tank Fuel Pump

ES#3087869 - 8W0919087K - In-Tank Fuel Pump - Get your vehicle running again - Genuine Volkswagen Audi - Audi

Get your vehicle running again

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3087869
Mfg#:
8W0919087K
Ships in 9 Business Days
9% off MSRP

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

$445.99

This product was last offered at the strikethrough price on
08-25-2026

$407.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Brisk Silver Racing ER14YS Spark Plug - Priced Each

ES#4017483 - ER14YS - Brisk Silver Racing ER14YS Spark Plug - Priced Each - Featuring silver fine wire center electrode - Superior ignition ability increases engine power! - Brisk - Audi Volkswagen Mercedes Benz

Featuring silver fine wire center electrode - Superior ignition ability increases engine power! Stock heat range with a projected tip

Brand:
Brisk - Corporate Logo
ES#:
4017483
Mfg#:
ER14YS
In Stock
8% off MSRP

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

$12.99

This product was last offered at the strikethrough price on
08-25-2026

$11.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Harmonic Balancer

ES#4779260 - 06L105243AS - Harmonic Balancer - Reduces torsional vibrations on your crankshaft - Genuine Volkswagen Audi - Audi

Reduces torsional vibrations on your crankshaft

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4779260
Mfg#:
06L105243AS
Ships in 4 Business Days
8% off MSRP

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

$441.99

This product was last offered at the strikethrough price on
02-26-2026

$404.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Gen3 Wastegate Adapter Harness

ES#5444824 - 060457LA01 - Gen3 Wastegate Adapter Harness - Make your next turbo swap a "one-and-done" job - ECS - Audi Volkswagen

Make your next turbo swap a "one-and-done" job 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
5444824
Mfg#:
060457LA01
In Stock
$49.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Intake Manifold Flap Position Sensor

ES#5433874 - 06K907386D - Intake Manifold Flap Position Sensor - Relays the position of the manifold flap to the ECU - Hamburg Tech - Audi Volkswagen

Relays the position of the manifold flap to the ECU

Brand:
Hamburg Tech - Corporate Logo
ES#:
5433874
Mfg#:
06K907386D
In Stock
ON SALE!
$49.99

This product was last offered at the strikethrough price on
08-25-2026

$46.02 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Electrical Connector Housing - 2 Pin - Priced Each

ES#441537 - 8E0973722 - Electrical Connector Housing - 2 Pin - Priced Each - Does not come with terminals or wires - Genuine Volkswagen Audi - Audi

Does not come with terminals or wires

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
441537
Mfg#:
8E0973722
Ships in 4 Business Days
7% off MSRP

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

$42.99

This product was last offered at the strikethrough price on
08-25-2026

$39.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
This product has been superseded to ES#4046596

Coolant Temperature Sensor - 2 Pin

ES#257175 - 06A919501A - Coolant Temperature Sensor - 2 Pin - Monitors coolant temperature for fan control & gauge readings - Genuine Volkswagen Audi - Audi Volkswagen

Monitors coolant temperature for fan control & gauge readings

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
257175
Mfg#:
06A919501A
In Stock
ON SALE! SAVE 10%
$48.43

This product was last offered at the strikethrough price on
08-23-2026

$43.59 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Turbo Manifold Gasket

ES#2631795 - 06L253039 - Turbo Manifold Gasket - Seals the turbocharger to the cylinder head - Genuine Volkswagen Audi - Audi Volkswagen

Seals the turbocharger to the cylinder head

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2631795
Mfg#:
06L253039
In Stock
$8.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator

ES#4836243 - 8W0121251AK - Radiator - Ensure proper cooling for your engine with a new radiator. - TYC - Audi

Ensure proper cooling for your engine with a new radiator.

Brand:
TYC - Corporate Logo
ES#:
4836243
Mfg#:
8W0121251AK
Ships in 2 Business Days
$201.99

This product was last offered at the strikethrough price on
05-07-2026

$195.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Oil Pump Drive Chain

ES#3220564 - 06K115225 - Oil Pump Drive Chain - Chain that drives the oil pump - Bremmen Parts - Audi Volkswagen

Chain that drives the oil pump 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bremmen Parts - Corporate Logo
ES#:
3220564
Mfg#:
06K115225
In Stock
ON SALE! SAVE 50%
$33.99

This product was last offered at the strikethrough price on
05-02-2026

$17.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Lower Radiator Hose

ES#3180935 - 8W0122055L - Lower Radiator Hose - Genuine Lower hose - Genuine Volkswagen Audi - Audi

Genuine Lower hose For vehicles with Manual Transmission only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3180935
Mfg#:
8W0122055L
Ships in 4 Business Days
8% off MSRP

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

$211.99

This product was last offered at the strikethrough price on
08-25-2026

$193.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Parts & Accessories

Whether you're maintaining or repairing your stock engine or looking for added horsepower, we have one of the most comprehensive inventories of engine parts and accessories for German cars. From hard engine parts like connecting rods, pistons, cylinder heads, short blocks, and engine timing parts to performance engine software upgrades; we have you covered.

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Manufacturer names and/or part numbers are used only for identification purposes.

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