Your Vehicle 1991 Porsche 911 964 Carrera 4 Convertible H6 3.6L

Change Clear

The above image is for illustrative purposes only.
Select options below.

Build-Your-Own MK4 1.8T Performance Cooling System Refresh Kit

Upgrade your 1.8T's cooling system with select performance upgrades from ECS Tuning!

10X Entries For Our 25th Anniversary Sweepstakes!

ES#:: 4005762
Mfg#:: 018163ECS03

Select Your Vehicle

Add to Wish List

Build-Your-Own MK4 1.8T Performance Cooling System Refresh Kit

Starting at: $267.74

SALE: 836.62

Starting at: $267.74

WAS: $926.99 on 06-13-2026

This product was last offered at the strikethrough price on
06-13-2026

Sale Save 10%

Free Shipping

Selected Options

Availability:

Back Ordered

Est. Ship Date:

No ETA

Qty

Add to Wish List

ECS Images
Upload

‹ ›

Select Options

all options

Select 1 of the options below

MK4 Performance Aluminum Radiator

Direct-fit upgrade! Featuring a 26% increase in cooling system capacity along with a durable, all aluminum construction

10X Entries For Our 25th Anniversary Sweepstakes!

4001222 018163ECS01KT

Availability:

In Stock

Est. Ship Date:

Today

Partial Replacement

Sale

SAVE 25% $356.99

This product was last offered at the strikethrough price on
06-13-2026

267.74

Included With Purchase

Select 1 of the options below

Cast Aluminum Cooling System Upgrade Kit

Replace the failure prone components in your cooling system with cast aluminum

10X Entries For Our 25th Anniversary Sweepstakes!

3086229 006368ECS01A1KT

Availability:

Back Ordered

Est. Ship Date:

No ETA

Lifetime Replacement

Sale

SAVE 24% $231.99

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

176.98

Cast Aluminum Coolant Flange

Located on the driver side of the cylinder head, this pipe contains the coolant tempature sensor

3470644 462-121-132AP

Availability:

Back Ordered

Est. Ship Date:

No ETA

Lifetime Replacement

49.99

Cast Aluminum 4-way Outlet Coolant Distribution Pipe

Replacement 4-way outlet at upper radiator hose in aluminum

3470646 462-121-087C

Availability:

Back Ordered

Est. Ship Date:

No ETA

Lifetime Replacement

24.99

Heavy Duty Cast Aluminum Thermostat Housing

The last thermostat housing you'll ever need!

10X Entries For Our 25th Anniversary Sweepstakes!

3086042 006660ECS01

Availability:

In Stock

Est. Ship Date:

Today

Lifetime Replacement

Sale

SAVE 25% $85.99

This product was last offered at the strikethrough price on
06-13-2026

64.49

Aluminum Split Pipe Coolant Fitting

Replaces the failure prone, plastic coolant split pipe from the turbo & expansion tank to the water pipe hose

10X Entries For Our 25th Anniversary Sweepstakes!

2748757 006368ECS01A

Availability:

In Stock

Est. Ship Date:

Today

Lifetime Replacement

Sale

Limited Qty Sale

$67.99

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

2.54

No, thank you.

Select 1 of the options below

Racing Thermostat (82C)

Prevent overheating and premature engine wear with a lower opening temperature

3184176 MMTS-GTI-99

Availability:

In Stock

Est. Ship Date:

Today

Lifetime Replacement

68.99

Thermostat (87°C)

Prevent overheating and premature engine wear

261231 050121113C

Availability:

In Stock

Est. Ship Date:

Today

Lifetime Replacement

Sale SAVE 15% $61.99

52.99

Thermostat (87°C)

Prevent overheating and premature engine wear. Includes O-ring

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

3149390 050121113C

Availability:

Back Ordered

Est. Ship Date:

No ETA

Lifetime Replacement

20.99

No, thank you.

Select 1 of the options below

Coolant Temperature Sensor With O-Ring & Clip - 4 Pin - *ECS Recommends*

Updated Green sensor with square/round connector. Please check existing sensor color

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

2535452 059919501AKTU

Availability:

In Stock

Est. Ship Date:

Today

Lifetime Replacement

20.66

Coolant Temperature Sensor With O-Ring & Clip - 4 Pin

Updated Green sensor with square/round connector. Please check existing sensor color

264174 059919501AKT2

Availability:

In Stock

Est. Ship Date:

Today

Lifetime Replacement

47.91

No, thank you.

Select 1 of the options below

Auxiliary Fan Switch � 95-102�C

Square connector with rounded ends, includes O-Ring

2146770 1H0698481B

Availability:

Back Ordered

Est. Ship Date:

No ETA

Lifetime Replacement

9.99

Radiator Fan Switch 95-102°C

Triangular Connector

310850 1J0959481A

Availability:

Available from Supplier

Est. Ship Date:

Ships in 1-2 days

Lifetime Replacement

Sale SAVE 7% $133.99

124.99

Radiator Fan Switch 95-102C

Triangular Connector

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

2537915 1J0959481A

Availability:

Available from Supplier

Est. Ship Date:

Ships on Dec 15, 2026

Lifetime Replacement

19.99

Auxiliary Fan Switch � 87-93�C

Square connector with rounded ends

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

251122 701959481

Availability:

Available from Supplier

Est. Ship Date:

Ships on Dec 15, 2026

Lifetime Replacement

16.99

Auxiliary Fan Switch � 75-82�C

Square connector with rounded ends

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

1928244 1H0959481D

Availability:

In Stock

Est. Ship Date:

Today

Lifetime Replacement

15.99

No, thank you.

Select 1 of the options below

Expansion Tank Replacement Kit - Complete Assembly With Porsche Cap

Add some style with this reservoir kit which includes an aluminum Porsche coolant cap!

10X Entries For Our 25th Anniversary Sweepstakes!

2597343 42012132118T

Availability:

In Stock

Est. Ship Date:

Today

Lifetime Replacement

Sale

SAVE 4% $82.99

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

80.01

Expansion Tank Replacement Kit - Complete Assembly

Clean up your engine bay or replace your cracked unit with a new coolant expansion tank replacement kit.

10X Entries For Our 25th Anniversary Sweepstakes!

2575924 1J01000-1

Availability:

In Stock

Est. Ship Date:

Today

Partial Replacement

Sale

SAVE 18% $29.99

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

24.70

Coolant Expansion Tank

Clean up your engine bay or replaced your cracked unit with a new coolant expansion tank

1905029 1J0121407F

Availability:

Available from Supplier

Est. Ship Date:

Ships Aug 7, 2026

Lifetime Replacement

Sale SAVE 27% $77.15

56.17

Coolant Expansion Tank

Clean up your engine bay or replaced your cracked unit with a new coolant expansion tank

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

2709358 1J0121407F

Availability:

In Stock

Est. Ship Date:

Today

Lifetime Replacement

15.99

No, thank you.

Select 1 of the options below

7 Piece Silicone Coolant Hose Kit - Black

Replace your stock rubber hoses with silicone

1843968 FMKC005

Availability:

Back Ordered

Est. Ship Date:

No ETA

Lifetime Replacement

377.99

7 Piece Silicone Coolant Hose Kit - Blue

Replace your stock rubber hoses with silicone

1843970 FMKC005B

Availability:

Back Ordered

Est. Ship Date:

No ETA

Lifetime Replacement

230.00

7 Piece Silicone Coolant Hose Kit - Red

Replace your stock rubber hoses with silicone

1843969 FMKC005R

Availability:

Back Ordered

Est. Ship Date:

No ETA

Lifetime Replacement

230.00

No, thank you.

Select 1 of the options below

G13 Coolant - 1.5 Liter

Lilac OE VW/Audi specification concentrate lifetime coolant

We Price Match - Give Us A Call or Chat!

2603076 G013A8JM1

Availability:

In Stock

Est. Ship Date:

Today

No Lifetime Replacement

21.99

Liquid Chill Premixed Synthetic Engine Coolant - 64oz

Perfect for a top off any time you need it!

3676995 MMRALC505064F

Availability:

In Stock

Est. Ship Date:

Today

Lifetime Replacement

28.99

Genuine Volkswagen Audi G12evo Coolant / Antifreeze - 1 Gallon (3.78 Liters)

Extended Life Coolant Pre-mixed 50/50

4672297 G12E0501GRTU

Availability:

In Stock

Est. Ship Date:

Today

No Lifetime Replacement

30.95

No, thank you.

Product Details

10X Entries For Our 25th Anniversary Sweepstakes!

This comprehensive kit was designed to address the major issues with the cooling system while giving you some added performance benefits. The ECS Tuning in-house engineered Performance Aluminum Radiator utilizes a larger volume, dual row, dual-pass aluminum heat exchanger, hand TIG-welded to 5052 aluminum end tanks and polished to perfection. Featuring a 26% increase in overall volume compared to stock, this is a direct replacement radiator that will outperform and outlast the OE unit!

Instead of chasing one issue at a time, ECS designed this kit to make it simple. Replace all your potentially faulty components in one afternoon for peace of mind.

To ensure completely hassle-free operation, make sure the water pump has been or will be serviced during the timing belt service. ECS has a wide selection of timing belt kits to ensure your car is always running at peak performance.

This Part Fits the Following Vehicles

Make	Model	Submodel	Engine	Special Fitment Notes
Volkswagen	337/20AE	All	1.8T	Use vehicle selector to confirm fitment
Volkswagen	Golf IV	All	1.8T	Use vehicle selector to confirm fitment
Volkswagen	Jetta IV	All	1.8T	Use vehicle selector to confirm fitment
Volkswagen	Jetta IV GLI	All	1.8T	Use vehicle selector to confirm fitment

*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.