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Audi A3 Engine Parts & Accessories

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Thermostat

ES#4900543 - 03L121111AC - Thermostat - This also includes the thermostat housing - Meyle - Audi Volkswagen

This also includes the thermostat housing 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
4900543
Mfg#:
03L121111AC
Special Order: No Guaranteed ETA
$55.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat

Includes housing and gasket 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Meyle - Corporate Logo
ES#:
5483075
Mfg#:
06L121111N
Special Order: No Guaranteed ETA
$472.00 USD
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Water Pump

Secondary pump for more efficient cooling 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Meyle - Corporate Logo
ES#:
5482286
Mfg#:
5Q0965561B
Special Order: No Guaranteed ETA
$183.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Vacuum Pump

Generates vacuum when under positive pressure

Brand:
Pierburg - Corporate Logo
ES#:
3236233
Mfg#:
06L145100B
Special Order: No Guaranteed ETA
$238.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Intake Manifold

Complete intake manifold with incorporated flapper motor

Brand:
Pierburg - Corporate Logo
ES#:
5341165
Mfg#:
06L133201FP
Special Order: No Guaranteed ETA
$334.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Valve Stem Seal - Priced Each

Seals the valve stem in the cylinder head. 6mm 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
5470575
Mfg#:
036109675
Ships on Dec 4, 2026
Auto Notify
ON SALE! SAVE 20%
$1.99

This product was last offered at the strikethrough price on
05-29-2026

$1.59 USD
This product is lifetime replacement eligible Lifetime Replacement

Cylinder Head Cooling Flange

Common area for coolant leaks - Located on cylinder head 10X Entries For Our 25th Anniversary Sweepstakes!
For vehicles with FSI engines only

Brand:
Bremmen Parts - Corporate Logo
ES#:
5470357
Mfg#:
06F121132H
Ships on Dec 24, 2026
Auto Notify
ON SALE! SAVE 20%
$42.99

This product was last offered at the strikethrough price on
05-29-2026

$34.39 USD
This product is lifetime replacement eligible Lifetime Replacement

Transmission Mount - Left

We Price Match - Give Us A Call or Chat!

Brand:
Lemforder - Corporate Logo
ES#:
4347969
Mfg#:
5Q0199555BG
Special Order: No Guaranteed ETA
$94.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Stage 1 Software Upgrade - With Program Switching (Fully Loaded)

ES#2914972 - 20TSTG1CHIP4KT - Stage 1 Software Upgrade - With Program Switching (Fully Loaded) - Average gain of 50 horsepower and 74 lb-ft of torque on 93 octane! - APR - Audi Volkswagen

Average gain of 50 horsepower and 74 lb-ft of torque on 93 octane! Call In Or Chat For Best Price! 5X Entries For Our 25th Anniversary Sweepstakes!
This upgrade can be performed via our Chip & Ship method or the vehicle can be brought to ECS Tuning's fa
For vehicles with FSI engines only. Ship your ECU for free, or drive your vehicle to our location

Brand:
APR - Corporate Logo
ES#:
2914972
Mfg#:
20TSTG1CHIP4KT
Back Ordered
$699.94 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing O-Ring

ES#5373591 - 021121119A - Thermostat Housing O-Ring - O-Ring between thermostat housing and cylinder head - Ajusa - Audi Volkswagen

O-Ring between thermostat housing and cylinder head

Brand:
Ajusa - Corporate Logo
ES#:
5373591
Mfg#:
021121119A
Back Ordered
$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Installation Kit

ES#2592791 - 1K0121367PKT2 - Radiator Installation Kit - Includes everything you need to install a new radiator - Assembled By ECS - Audi

Includes everything you need to install a new radiator 10X Entries For Our 25th Anniversary Sweepstakes!
For TSI engine models with CCTA engine code & DSG transmission only

Brand:
Assembled By ECS - Corporate Logo
ES#:
2592791
Mfg#:
1K0121367PKT2
Back Ordered
Auto Notify
$293.99

This product was last offered at the strikethrough price on
06-18-2026

$292.99 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Oil Service Kit - With Silver Billet Aluminum Oil Filter Housing

ES#2951301 - 21063-538-032KT - Oil Service Kit - With Silver Billet Aluminum Oil Filter Housing - Includes HighTec Synt RS Engine Oil (5W-40), Genuine Oil Filter and an ECS billet filter housing - Assembled By ECS - Audi

Includes HighTec Synt RS Engine Oil (5W-40), Genuine Oil Filter and an ECS billet filter housing 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
2951301
Mfg#:
21063-538-032KT
Back Ordered
ON SALE!
$206.99

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

$204.54 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Oil Service Kit - With ECS Magnetic Drain Plug

ES#3143760 - 071115562C2KT - Oil Service Kit - With ECS Magnetic Drain Plug - Includes oil filter and Fuchs 5w-40 oil - Assembled By ECS - Audi Volkswagen

Includes oil filter and Fuchs 5w-40 oil 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
3143760
Mfg#:
071115562C2KT
Back Ordered
$102.99 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Oil Service Kit

ES#3143759 - 071115562C1KT - Oil Service Kit - Includes oil filter and Fuchs 5w-40 oil - Assembled By ECS - Audi Volkswagen

Includes oil filter and Fuchs 5w-40 oil 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
3143759
Mfg#:
071115562C1KT
Back Ordered
ON SALE!
$82.31 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Oil Service Kit - With Polished Billet Aluminum Oil Filter Housing

ES#2951302 - 21063-538-033KT - Oil Service Kit - With Polished Billet Aluminum Oil Filter Housing - Includes HighTec Synt RS Engine Oil (5W-40), Genuine Oil Filter and an ECS billet filter housing - Assembled By ECS - Audi

Includes HighTec Synt RS Engine Oil (5W-40), Genuine Oil Filter and an ECS billet filter housing 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
2951302
Mfg#:
21063-538-033KT
Back Ordered
$210.99 USD
Free Shipping
This product is lifetime replacement eligible Partial 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.

Let us help you find the parts that fit your Audi

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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