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Audi B6 A4 Quattro 1.8T Engine Parts & Accessories

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ES#4220586 - 8E0121321 - Expansion Tank Cap - Plastic pressure cap for expansion tank - Rein - Audi

Plastic pressure cap for expansion tank affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
4220586
Mfg#:
8E0121321
In Stock at Vendor
$18.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2587165 - 06A121012G - Water Pump - Prevent overheating by keeping your coolant flowing. - Graf - Audi

Prevent overheating by keeping your coolant flowing. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Graf - Corporate Logo
ES#:
2587165
Mfg#:
06A121012G
Ships in 1-2 days
$57.99

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

$55.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3706346 - 070903803E - Voltage Regulator - Huco - Audi Volkswagen

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Huco - Corporate Logo
ES#:
3706346
Mfg#:
070903803E
Back Ordered
$55.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4735200 - R83-GNH08300 - 83.00mm Piston Ring Kit - Priced Per Cylinder - Set of rings for one piston in 83mm size,  For Supertech pistons only. - Supertech - Audi Volkswagen

Set of rings for one piston in 83mm size, For Supertech pistons only. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Supertech - Corporate Logo
ES#:
4735200
Mfg#:
R83-GNH08300
In Stock
$27.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#6482 - 06A919081J - Oil Pressure Switch - Black - Senses engine oil pressure for the ECU and warning light. 1.2-1.6 BAR - Meistersatz - Audi Volkswagen

Senses engine oil pressure for the ECU and warning light. 1.2-1.6 BAR affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Meistersatz - Corporate Logo
ES#:
6482
Mfg#:
06A919081J
Ships in 1 Business Day
$6.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#12145 - 06B103485C - Oil Cap  - Clean up your engine bay with a new oil cap. - Rein - Audi Volkswagen

Clean up your engine bay with a new oil cap. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
12145
Mfg#:
06B103485C
In Stock at Vendor
$6.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3353262 - N90365302 - Sealing O-Ring - Priced Each - Genuine Porsche - Audi Volkswagen

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
O-Ring for the faulty coolant "J-Plug" that is located next to the thermostat.

Brand:
Genuine Porsche - Corporate Logo
ES#:
3353262
Mfg#:
N90365302
In Stock
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Also referred to as the 'relay roller' affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Dayco - Corporate Logo
ES#:
4147561
Mfg#:
06B903341B
In Stock at Vendor
$56.99

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

$54.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3557652 - 3R0959126 - A/C Pressure Safety Switch - Prevents excess pressure from building within the system - Original Equipment Supplier - Audi

Prevents excess pressure from building within the system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Original Equipment Supplier - Corporate Logo
ES#:
3557652
Mfg#:
3R0959126
Back Ordered
$54.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3189917 - 82571 - Brake Fluid Reservoir Cap - Clean up your engine bay with a new cap - Dorman - Audi Volkswagen

Clean up your engine bay with a new cap affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Dorman - Corporate Logo
ES#:
3189917
Mfg#:
82571
Ships in 4 Business Days
$53.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4487832 - 06B103493AE - Elbow Hose - Connects the hard vent tube to the intake hose - URO - Audi

Connects the hard vent tube to the intake hose affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!
From VIN 8E-4-000001, split is in the 2004 model year

Brand:
URO - Corporate Logo
ES#:
4487832
Mfg#:
06B103493AE
Ships on Jul 8, 2026
$26.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4932077 - 06E906433 - Crankshaft Position Sensor - Referred to as the speed sensor & reference sensor - URO - Audi

Referred to as the speed sensor & reference sensor affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
URO - Corporate Logo
ES#:
4932077
Mfg#:
06E906433
Ships in 1 Business Day
$17.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2102470 - SEAT-H1000 - SuperTech Valve Seat - Priced Each - Supertech - Audi Volkswagen

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Supertech - Corporate Logo
ES#:
2102470
Mfg#:
SEAT-H1000
Ships in 8 Business Days
$8.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2972929 - 059919501AKT2 -  Coolant Temperature Sensor - Revised green 4 pin sensor, located in the cooling flange located on the side of the cylinder head - Hamburg Tech - Audi Volkswagen

Revised green 4 pin sensor, located in the cooling flange located on the side of the cylinder head affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!
Located in the coolant flange

Brand:
Hamburg Tech - Corporate Logo
ES#:
2972929
Mfg#:
059919501AKT2
In Stock
Limited Qty Sale
$14.27

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

$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#469677 - N90355904 - Bolt (M8x30) - Install new hardware with your new parts - Genuine Volkswagen Audi - Audi

Install new hardware with your new parts affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Secures the snub mount support bracket to the engine

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
469677
Mfg#:
N90355904
Ships in 1-2 days
30% off MSRP

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

$8.50

This product was last offered at the strikethrough price on
06-12-2026

$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3022 - 058905291K - Check Valve - Priced Each - Used in multiple locations in vacuum system - Genuine Volkswagen Audi - Audi Volkswagen

Used in multiple locations in vacuum system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3022
Mfg#:
058905291K
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.

$58.99

This product was last offered at the strikethrough price on
06-12-2026

$52.99 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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