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Audi B5 A4 Quattro 1.8T

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Audi B5 A4 Quattro 1.8T Engine Cooling Parts

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Thermostat Replacement Kit

ES#2581864 - 050121113ckt-2 - Thermostat Replacement Kit - Maintain proper operating temperature with a new thermostat, housing and hardware - Genuine Volkswagen Audi - Audi

Maintain proper operating temperature with a new thermostat, housing and hardware

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2581864
Mfg#:
050121113CKT-2
In Stock
$83.99

This product was last offered at the strikethrough price on
10-01-2026

$79.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cast Aluminum Cylinder Head Cooling Flange

ES#4070439 - 462-121-132b5KT - Cast Aluminum Cylinder Head Cooling Flange - Located on the back of the cylinder head - iABED Industries - Audi Volkswagen

Located on the back of the cylinder head For vehicles with AWM engine code only

Brand:
iABED Industries - Corporate Logo
ES#:
4070439
Mfg#:
462-121-132B5KT
Back Ordered
$39.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Fan Switch (75-82°C) - 3 Pin

ES#5396123 - 1009597517 - Auxiliary Fan Switch (75-82C) - 3 Pin - Located on the lower side of the radiator - Meyle - Audi Volkswagen

Located on the lower side of the radiator 5X Entries Into Our F80 M3 Sweepstakes

Brand:
Meyle - Corporate Logo
ES#:
5396123
Mfg#:
1009597517
Ships in 5 Business Days
$15.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Sensor Retaining Clip - Priced Each

ES#4940095 - 032121142 - Sensor Retaining Clip - Priced Each - Used for ECS 2.0T boost taps - Bremmen Parts - Audi Volkswagen

Used for ECS 2.0T boost taps 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bremmen Parts - Corporate Logo
ES#:
4940095
Mfg#:
032121142
In Stock
ON SALE! SAVE 50%
$1.99

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

$0.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Heater Core Hose - Return

ES#4818195 - 8D0819373N - Heater Core Hose - Return - Connects the heater core to the hard water pipe - URO - Audi Volkswagen

Connects the heater core to the hard water pipe 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
From VIN 8D-V-143893, split is in the 1997 model year

Brand:
URO - Corporate Logo
ES#:
4818195
Mfg#:
8D0819373N
Back Ordered
$12.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Turbo Coolant Hose - Supply

Connects the turbocharger to the connection flange

Brand:
Cohline - Corporate Logo
ES#:
4069249
Mfg#:
06B121497F
Ships in 2 Business Days
$77.50

This product was last offered at the strikethrough price on
09-04-2026

$77.46 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing

ES#2804447 - 06B121121L - Thermostat Housing - Located on the left side of the engine block - Bremmen Parts - Audi Volkswagen

Located on the left side of the engine block 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bremmen Parts - Corporate Logo
ES#:
2804447
Mfg#:
06B121121L
In Stock
ON SALE! SAVE 15%
$9.99

This product was last offered at the strikethrough price on
09-16-2026

$8.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Freeze Plug - Priced Each

ES#274313 - 036103113A - Freeze Plug - Priced Each - Keep your engine block sealed. 36.6mm - Genuine Volkswagen Audi - Audi Volkswagen

Keep your engine block sealed. 36.6mm Engine codes AEB & ATW

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
274313
Mfg#:
036103113A
Ships in 1-2 days
$4.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Replacement Kit

ES#2581867 - 050121113ckt-3 - Thermostat Replacement Kit - Maintain proper operating temperature with a new thermostat, housing and hardware - Assembled By ECS - Audi

Maintain proper operating temperature with a new thermostat, housing and hardware 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2581867
Mfg#:
050121113CKT-3
Ships in 3 Business Days
ON SALE! SAVE 18%
$44.99

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

$37.04 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Heater Core

ES#2804529 - 8D1819030B - Heater Core - Stop coolant loss and cure a fogged windshield - OE Aftermarket - Audi Volkswagen

Stop coolant loss and cure a fogged windshield

Brand:
OE Aftermarket - Corporate Logo
ES#:
2804529
Mfg#:
8D1819030B
Ships in 4 Business Days
$23.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Sealing O-Ring - Priced Each

ES#4057465 - N90316802 - Sealing O-Ring - Priced Each - Seal for most clip-in cooling sensors/senders. M19.6x3.6mm - Victor Reinz - Audi Volkswagen

Seal for most clip-in cooling sensors/senders. M19.6x3.6mm

Brand:
Victor Reinz - Corporate Logo
ES#:
4057465
Mfg#:
N90316802
Ships in 3 Business Days
$3.99

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

$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Water Pump

ES#1831967 - 050121010cx - Water Pump - Featuring a techno polymer impeller - Graf - Audi Volkswagen

Featuring a techno polymer impeller

Brand:
Graf - Corporate Logo
ES#:
1831967
Mfg#:
050121010CX
Ships in 2 Business Days
$72.99

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

$70.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Cooler Hose - Supply

ES#277605 - 058121058C - Oil Cooler Hose - Supply - Connects the oil cooler to the hard water pipe - Genuine Volkswagen Audi - Audi Volkswagen

Connects the oil cooler to the hard water pipe Up to VIN 8D-X-199999, split is in the 1999 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
277605
Mfg#:
058121058C
Ships in 3 Business Days
11% off MSRP

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

$79.99

This product was last offered at the strikethrough price on
08-31-2026

$70.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Hose - Lower

ES#2580445 - 4B0121055J - Radiator Hose - Lower - Connects the lower radiator port to the water pump and expansion tank - Hutchinson Worldwide - Audi Volkswagen

Connects the lower radiator port to the water pump and expansion tank

Brand:
Hutchinson Worldwide - Corporate Logo
ES#:
2580445
Mfg#:
4B0121055J
In Stock
ON SALE! SAVE 19%
$85.99

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

$69.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Fan Pulley

ES#6892 - 06b119145 - Auxiliary Fan Pulley - For the belt driven auxiliary fan - Genuine Volkswagen Audi - Audi Volkswagen

For the belt driven auxiliary fan Engine code AWM

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
6892
Mfg#:
06B119145
Ships in 7 Business 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.

$77.99

This product was last offered at the strikethrough price on
10-05-2026

$69.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Lower Radiator Mount - Priced Each

ES#1731 - 8D0121275 - Lower Radiator Mount - Priced Each - Stabilizes the radiator within the core support - Genuine Volkswagen Audi - Audi Volkswagen

Stabilizes the radiator within the core support

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
1731
Mfg#:
8D0121275
Ships in 1-2 days
$9.99 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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