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Volkswagen Passat B4 VR6 12v

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Volkswagen Passat B4 VR6 12v Engine Cooling Parts

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Expansion Tank Cap

ES#302253 - 1H0121321C - Expansion Tank Cap - Keep proper pressure in your coolant system - Genuine Volkswagen Audi - Volkswagen

Keep proper pressure in your coolant system

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
302253
Mfg#:
1H0121321C
In Stock
11% off MSRP

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

$54.58

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

$48.58 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Tester

ES#2696212 - V99-1005 - Coolant Tester - Make sure your coolant is safe from freezing! - Vaico - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Make sure your coolant is safe from freezing! We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
2696212
Mfg#:
V99-1005
Back Ordered
$51.99

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

$37.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

O-Ring - Priced Each

ES#4197 - N10139201 - O-Ring - Priced Each - O-ring for each side of the plastic bypass pipe under intake. 34.5x3.55 - Rein - Audi Volkswagen

O-ring for each side of the plastic bypass pipe under intake. 34.5x3.55 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
4197
Mfg#:
N10139201
In Stock
$4.28 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Fan Control Unit

ES#3236129 - 74721104 - Auxiliary Fan Control Unit - Located near coolant reservoir - Gates - Volkswagen

Located near coolant reservoir

Brand:
Gates - Corporate Logo
ES#:
3236129
Mfg#:
74721104
Ships on Oct 7, 2026
$183.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 80°C

ES#4952533 - 075121113D - Thermostat - 80C - Does not include sealing O-Ring - Bremmen Parts - Audi Volkswagen

Does not include sealing O-Ring 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bremmen Parts - Corporate Logo
ES#:
4952533
Mfg#:
075121113D
In Stock
ON SALE! SAVE 24%
$14.99

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

$11.42 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

BFI Cooling Kit - Low Temp 70º Thermostat

ES#3022012 - EBFIVR6-LCK - BFI Cooling Kit - Low Temp 70 Thermostat - Complete kit of flanges and pipes, including the BFI aluminum water pipe - Black Forest Industries - Volkswagen

Complete kit of flanges and pipes, including the BFI aluminum water pipe

Brand:
Black Forest Industries - Corporate Logo
ES#:
3022012
Mfg#:
EBFIVR6-LCK
Back Ordered
$179.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Fan Switch � 75-82�C

ES#1928244 - 1H0959481D - Auxiliary Fan Switch 75-82C - Square connector with rounded ends - Meyle - Audi Volkswagen

Square connector with rounded ends 5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
For vehicles with square connector only

Brand:
Meyle - Corporate Logo
ES#:
1928244
Mfg#:
1H0959481D
In Stock
$15.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Fan Control Unit

ES#2815678 - 357919506A - Auxiliary Fan Control Unit - Located near coolant reservoir - Hamburg Tech - Volkswagen

Located near coolant reservoir We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2815678
Mfg#:
357919506A
Ships in 2 Business Days
$85.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Sealing O-Ring - Priced Each

ES#3419389 - N90316802 - Sealing O-Ring - Priced Each - Seal for most clip-in cooling sensors/senders. M19.6x3.6mm - Rein - Audi Volkswagen

Seal for most clip-in cooling sensors/senders. M19.6x3.6mm 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
3419389
Mfg#:
N90316802
In Stock
$2.12 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Water Pump

ES#4232 - 034965561C - Auxiliary Water Pump - Electric water pump - Bosch - Audi Volkswagen

Electric water pump We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
4232
Mfg#:
034965561C
Ships in 2 Business Days
$156.71 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing

ES#2594504 - 021121117A - Thermostat Housing - Located on the drivers side of the engine, does not include required o-rings - URO - Volkswagen

Located on the drivers side of the engine, does not include required o-rings 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2594504
Mfg#:
021121117A
Ships in 2 Business Days
$25.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing O-Ring

ES#2394 - 021121119A - Thermostat Housing O-Ring - O-Ring between thermostat housing and cylinder head - Victor Reinz - Audi Volkswagen

O-Ring between thermostat housing and cylinder head

Brand:
Victor Reinz - Corporate Logo
ES#:
2394
Mfg#:
021121119A
In Stock at Vendor
$10.99

This product was last offered at the strikethrough price on
04-28-2026

$4.07 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Aluminum Water Pipe Kit - No Thermostat

ES#2730481 - VR6THKWACSKT - Aluminum Water Pipe Kit - No Thermostat - Complete kit of flanges and pipes, including the long lasting ECS aluminum water pipe in silver - Assembled By ECS - Volkswagen

Complete kit of flanges and pipes, including the long lasting ECS aluminum water pipe in silver 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2730481
Mfg#:
VR6THKWACSKT
In Stock
ON SALE!
$161.99

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

$150.28 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Replacement Kit

ES#2763367 - 075121113DKT3 - Thermostat Replacement Kit - Includes the parts you'll want to replace while performing a thermostat replacement - Assembled By ECS - Volkswagen

Includes the parts you'll want to replace while performing a thermostat replacement 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2763367
Mfg#:
075121113DKT3
In Stock
ON SALE!
$71.99

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

$71.18 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Thermostat Housing

ES#2677915 - 021121117A - Thermostat Housing - Located on the drivers side of the engine. O-rings sold separately. - Vaico - Volkswagen

Located on the drivers side of the engine. O-rings sold separately. We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
2677915
Mfg#:
021121117A
Ships in 2 Business Days
$48.99

This product was last offered at the strikethrough price on
08-26-2026

$46.95 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cast Aluminum Thermostat Housing

ES#3553455 - 462-121-VR37A - Cast Aluminum Thermostat Housing - Replace your inferior plastic housing - iABED Industries - Volkswagen

Replace your inferior plastic housing

Brand:
iABED Industries - Corporate Logo
ES#:
3553455
Mfg#:
462-121-VR37A
Back Ordered
$139.99 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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