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Your Vehicle BMW E46 323i M52 2.5L

Cooling System Service Kits | Audi B6 A4 1.8T

A critical maintenance need in your Audi is refreshing the Cooling System.

The components and coolant are subjected to extreme temperatures and drastic fluctuations between hot and cold under even normal driving conditions. Excessive heat from competitive conditions exponentially increase the stress on your system. This causes deterioration of hoses and housings, which inevitably lead to coolant leaks and improper cooling of your engine.

Regular replacement of system components and flushing your coolant are important to ensure proper function.


Prevent problems

Fitment:
Audi B6 A4 1.8T 2002-2005

Billet Aluminum Coolant J-Plug W/ O-ring (06B103033A)
Engineered to be the last worry in your coolant system
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Brand: ECS - Corporate Logo
ES#: 2763232
Mfg#: 005224ECS01A

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Availability:
In Stock
On SALE Save 30%
$64.99

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

$45.49 USD
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on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
Thermostat Replacement Kit With ECS Billet Aluminum J-Plug
Includes ECS' upgraded J-Plug, a new thermostat, o-ring, and hardware
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Brand: Assembled By ECS - Corporate Logo
ES#: 2777024
Mfg#: 06B121111KKT3

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Availability:
In Stock
On SALE Save 25%
$159.99

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

$120.70 USD
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This product is lifetime replacement eligible Lifetime Replacement
Thermostat Replacement Kit
Includes new thermostat, j-plug, o-ring, and hardware
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand: Assembled By ECS - Corporate Logo
ES#: 2574945
Mfg#: 06B121111KKT

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Availability:
In Stock
On SALE Save 19%
$116.99

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

$94.55 USD
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This product is lifetime replacement eligible Lifetime Replacement
Cooling Flange Replacement Kit
Cure the common coolant leak coming from the back of your engine compartment
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand: Assembled By ECS - Corporate Logo
ES#: 2602901
Mfg#: 06B121132EKT1

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Availability:
In Stock
On SALE Save 25%
$64.99

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

$49.06 USD
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on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
Cooling Flange Replacement Kit - With Coolant
Cure the common coolant leak coming from the back of your engine compartment
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand: Assembled By ECS - Corporate Logo
ES#: 2602886
Mfg#: 06B121132EKT

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Availability:
In Stock
On SALE Save 11%
$103.99

This product was last offered at the strikethrough price on
01-03-2026

$92.19 USD
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This product is lifetime replacement eligible Partial Replacement
Cooling Flange Replacement Kit
Cure the common coolant leak coming from the back of your engine compartment
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Brand: Genuine Volkswagen Audi - Corporate Logo
ES#: 2649713
Mfg#: 06B121132EKT3

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Availability:
In Stock
$121.99 USD
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This product is lifetime replacement eligible Lifetime Replacement
Cooling System Refresh Kit - Level 1
Replace your thermostat, temp sensor and expansion tank with one kit!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand: Assembled By ECS - Corporate Logo
ES#: 2586289
Mfg#: 06B121111K2KT

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Availability:
In Stock at Vendor
On SALE Save 11%
$227.99

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

$203.45 USD
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This product is lifetime replacement eligible Partial Replacement
Cooling System Refresh Kit - Level 1 With ECS Billet Aluminum J-Plug
Includes ECS' upgraded J-plug & replace your thermostat, temp sensor & expansion tank with one kit!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand: Assembled By ECS - Corporate Logo
ES#: 2795701
Mfg#: 06B121111KT2

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Availability:
In Stock at Vendor
On SALE Save 17%
$274.99

This product was last offered at the strikethrough price on
01-03-2026

$228.28 USD
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This product is lifetime replacement eligible Partial Replacement
Cooling System Refresh Kit - Level 2
Replace your thermostat, temp sensors, coolant flange, and expansion tank with one kit!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand: Assembled By ECS - Corporate Logo
ES#: 2608082
Mfg#: 06B121111KKT2

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Availability:
In Stock at Vendor
On SALE Save 11%
$271.99

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

$241.49 USD
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This product is lifetime replacement eligible Partial Replacement
Cooling System Refresh Kit - Level 2 With ECS Billet Aluminum J-Plug
Includes ECS' upgraded J-plug & replace your thermostat, temp sensors, coolant flange, & expansion tank with one kit!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand: Assembled By ECS - Corporate Logo
ES#: 2795704
Mfg#: 06B121111KT3

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Availability:
In Stock at Vendor
On SALE Save 17%
$317.99

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

$264.08 USD
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This product is lifetime replacement eligible Partial Replacement
Cooling System Refresh Kit - Level 3
Replace critical cooling system components and perform a proper coolant system flush
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand: Assembled By ECS - Corporate Logo
ES#: 2608083
Mfg#: 06B121132EKT2

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Availability:
In Stock at Vendor
On SALE Save 11%
$284.99

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

$252.78 USD
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This product is lifetime replacement eligible Partial Replacement
Cooling System Refresh Kit - Level 3 With ECS Billet Aluminum J-Plug
Includes ECS' upgraded J-plug, replace critical cooling system components & perform a proper coolant system flush
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand: Assembled By ECS - Corporate Logo
ES#: 2795706
Mfg#: 06B121132EKT4

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Availability:
In Stock at Vendor
On SALE Save 17%
$330.99

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

$274.71 USD
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This product is lifetime replacement eligible Partial Replacement
G13 Coolant - 1.5 Liter
Lilac OE VW/Audi specification concentrate lifetime coolant
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!
Brand: Vaico - Corporate Logo
ES#: 2603076
Mfg#: G013A8JM1

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Availability:
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$21.99 USD
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on orders $49 and up
This product has been superseded to ES#4672297
Genuine Volkswagen Audi G13 Coolant / Antifreeze - 1 Gallon (3.78 Liters)
Lilac Extended Life Coolant
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Brand: Genuine Volkswagen Audi - Corporate Logo
ES#: 2603000
Mfg#: G013A8J1G
No longer available
G13 Coolant - 5 Liter (1.32 Gallons)
Lilac Pentofrost OE specification lifetime coolant
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Brand: Pentosin - Corporate Logo
ES#: 2748904
Mfg#: G013A8J1G

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Availability:
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$44.99 USD
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G13 Coolant - 1.5 Liter (Concentrate)
Lilac Pentofrost OE specification lifetime coolant.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand: Pentosin - Corporate Logo
ES#: 2748899
Mfg#: G013A8JM1

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Availability:
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$18.99 USD
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Radiator Relief Flush
Concentrated cleansing agent that effectively cleans your cooling system!
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Brand: DEI - Corporate Logo
ES#: 2608077
Mfg#: 040202

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Availability:
In Stock
$13.99 USD
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on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
Oil Cooler replacement Kit - Stage 1
Everything you need to replace your leaking oil cooler
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Brand: Assembled By ECS - Corporate Logo
ES#: 2718912
Mfg#: 028117021LKT2

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Availability:
In Stock
On SALE Save 19%
$107.99

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

$87.48 USD
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This product is lifetime replacement eligible Partial Replacement
Oil Cooler Replacement Kit - Stage 2
Includes the necessary components to replace your oil cooler and perform an engine oil service
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand: Assembled By ECS - Corporate Logo
ES#: 2973079
Mfg#: 028117021LKT6

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Availability:
In Stock
On SALE
$194.99

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

$177.80 USD
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This product is lifetime replacement eligible Partial Replacement

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