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Audi C4 S4 Quattro 20v T

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Audi C4 S4 Quattro 20v T Engine Cooling Parts

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Thermostat Housing

ES#2708530 - 074121121B - Thermostat Housing - Located behind water pump housing - URO - Audi Volkswagen

Located behind water pump housing 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2708530
Mfg#:
074121121B
Ships in 1 Business Day
$6.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Water Temperature Sensor

ES#2534318 - 12621288158 - Water Temperature Sensor - M14x1.5 Thread - URO - Audi BMW Volkswagen

M14x1.5 Thread 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2534318
Mfg#:
12621288158
Back Ordered
$6.99 USD
Free Shipping
on orders $49 and up

Expansion Tank Cap

ES#10455 - 443121321 - Expansion Tank Cap - Keep proper pressure on your coolant - Febi - Audi Volkswagen

Keep proper pressure on your coolant 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
10455
Mfg#:
443121321
In Stock at Vendor
$6.11 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Water Pump Seal

ES#10493 - 035121043 - Water Pump Seal - Keep your waterpump leak free! - Victor Reinz - Audi

Keep your waterpump leak free!

Brand:
Victor Reinz - Corporate Logo
ES#:
10493
Mfg#:
035121043
Back Ordered
$2.03 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

Keep proper pressure on your coolant We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2815739
Mfg#:
443121321
Ships in 1 Business Day
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
Scratch and Dent Item

Universal 12" Electric Fan - Black *Scratch And Dent*

ES#4920624 - 30102029SD - Universal 12" Electric Fan - Black *Scratch And Dent* - Scratch & Dent - Audi BMW MINI

ALL SALES FINAL. ITEMS MAY BE DAMAGED OR MISSING COMPONENTS. PLEASE SEE IMAGES BEFORE PURCHASING. Want To Haggle? Give Us A Call Or Chat To Make An Offer On This Product!

Brand:
Scratch & Dent - Corporate Logo
ES#:
4920624
Mfg#:
30102029SD
In Stock
ON SALE! SAVE 39%
$207.99

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

$127.00 USD
Free Shipping
on orders $49 and up

CSF Universal Large Single-Pass Cooler

ES#5470103 - 8371 - CSF Universal Large Single-Pass Cooler - Universal cooler used for: engine oil, transmission oil, power-steering, differential oil, and as a water/coolant heat exchanger. - CSF - Audi BMW Volkswagen Mercedes Benz MINI

Universal cooler used for: engine oil, transmission oil, power-steering, differential oil, and as a water/coolant heat exchanger. 2X Entries For Our 25th Anniversary Sweepstakes!
Universal fitment design - modifications may be necessary to run this cooler

Brand:
CSF - Corporate Logo
ES#:
5470103
Mfg#:
8371
Ships in 3 Business Days
$499.00 USD
Free Shipping

Electric Fan Assembly - 280mm

ES#3189425 - 620-818 - Electric Fan Assembly - 280mm - Factory replacement parts. - Dorman - Audi

Factory replacement parts.

Brand:
Dorman - Corporate Logo
ES#:
3189425
Mfg#:
620-818
Ships in 4 Business Days
$148.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Water Pump

ES#3991554 - 054121004A - Water Pump - Highly recommended when replacing timing belt - Graf - Audi

Highly recommended when replacing timing belt

Brand:
Graf - Corporate Logo
ES#:
3991554
Mfg#:
054121004A
In Stock at Vendor
$55.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Fan Switch (91-102°C) - 3 Pin

ES#4872634 - 191959481A - Auxiliary Fan Switch (91-102C) - 3 Pin - Located on the lower side of the radiator - Vemo - Audi Volkswagen

Located on the lower side of the radiator

Brand:
Vemo - Corporate Logo
ES#:
4872634
Mfg#:
191959481A
In Stock at Vendor
$16.75 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

THERMOSTAT WITH O-RING 87

Brand:
Meistersatz - Corporate Logo
ES#:
2801040
Mfg#:
69121113
Ships in 3 Business Days
$11.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Water Pump

ES#273610 - 034965561C - Auxiliary Water Pump - Electric water pump - Genuine Volkswagen Audi - Audi Volkswagen

Electric water pump

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
273610
Mfg#:
034965561C
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.

$372.99

This product was last offered at the strikethrough price on
07-31-2026

$347.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Coolant Temperature Sensor - 2 Pin

Blue sensor used by the ECU to control engine fueling

Brand:
MTC - Corporate Logo
ES#:
2090796
Mfg#:
025906041
Ships in 9 Business Days
$8.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Sealing O-Ring - Priced Each

Seal for most clip-in cooling sensors/senders. M19.6x3.6mm 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Elring - Corporate Logo
ES#:
5340675
Mfg#:
N90316802
Special Order: No Guaranteed ETA
$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

thermostat

ES#2865716 - 035121113B - thermostat - Low temperature replacement thermostat - Febi - Audi

Low temperature replacement thermostat 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2865716
Mfg#:
035121113B
Special Order: No Guaranteed ETA
$19.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Fan Switch Gasket

ES#4852722 - N0438083 - Radiator Fan Switch Gasket - Vemo Q+ - Audi Volkswagen

Brand:
Vemo Q+ - Corporate Logo
ES#:
4852722
Mfg#:
N0438083
Special Order: No Guaranteed ETA
$2.55 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Cooling Parts

Optimize your engine cooling system performance and heater output with quality drive belts, coolant hoses, cooling system parts, and approved coolant fluids from ECS Tuning. Head off expensive repairs and untimely breakdowns with regularly scheduled cooling system inspection and maintenance.

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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