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Audi A4 Engine Cooling Parts

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THERMOSTAT ASSEMBLY 100C

ES#4151133 - 06B121111K - THERMOSTAT ASSEMBLY 100C - Rein - Audi

2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
4151133
Mfg#:
06B121111K
Back Ordered
ON SALE!
$111.99

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

$106.39 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Water Pump

ES#3149397 - 026121005L - Water Pump - Features a plastic impeller and includes a metal gasket - Rein - Audi Volkswagen

Features a plastic impeller and includes a metal gasket 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
3149397
Mfg#:
026121005L
Back Ordered
ON SALE!
$52.99

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

$50.34 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Temperature Sensor

ES#4461213 - 058919501A - Coolant Temperature Sensor - 4 Pin - Blue - URO - Audi

4 Pin - Blue 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Up To VIN 8D-T-300000, Split is in the 1996 model year

Brand:
URO - Corporate Logo
ES#:
4461213
Mfg#:
058919501A
Back Ordered
$4.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#2535174 - 8D0121403D - Coolant Expansion Tank - Includes integrated coolant level sensor - URO - Audi

Includes integrated coolant level sensor 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Up to VIN 8D-W-007799, split is in the 1998 model year

Brand:
URO - Corporate Logo
ES#:
2535174
Mfg#:
8D0121403D
Back Ordered
$17.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Supply Hose

ES#4039683 - 8E1819371P - Coolant Supply Hose - Supplies coolant to provide heat for the heater core - Vaico - Audi

Supplies coolant to provide heat for the heater core We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
4039683
Mfg#:
8E1819371P
Special Order: No Guaranteed ETA
$67.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

AUDI | Radiator Hose

ES#4864974 - 8K0121081AH - AUDI | Radiator Hose - Vaico - Audi

We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
4864974
Mfg#:
8K0121081AH
Special Order: No Guaranteed ETA
$67.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Ultimate Timing Belt & Water Pump Service Kit

This kit treats the entire front engine drive assembly as a single system, replacing every component subject to wear and tear 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
5481960
Mfg#:
N0102228KT1
Back Ordered
$307.99

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

$304.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 87C

Prevent overheating and premature engine wear 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bremmen Parts - Corporate Logo
ES#:
4940301
Mfg#:
078121113F
Special Order: No Guaranteed ETA
ON SALE! SAVE 18%
$16.99

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

$13.86 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Upper Radiator Hose

Keep your cooling system free from cracks

Brand:
Original Equipment Supplier - Corporate Logo
ES#:
3659113
Mfg#:
8K0121101M
Back Ordered
$97.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

OE+ Upgraded Aluminum Coolant Return Pipe

Permanently solve a notorious Audi V6 cooling system weak point by replacing the failure-prone factory plastic heater pipe with this upgraded aluminum version. 2X Entries Into Our F80 M3 Sweepstakes

Brand:
Rein - Corporate Logo
ES#:
5515606
Mfg#:
06E121065NU
Back Ordered
$40.99 USD

Allen Bolt - Priced Each

Install new hardware with your new parts. M8x37 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Engine codes AEB & ATW. Secures the oil filter adapter to the engine

Brand:
Rein - Corporate Logo
ES#:
4004624
Mfg#:
N90339605
Back Ordered
ON SALE! SAVE 22%
$4.99

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

$3.87 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Temperature Sensor - 2 Pin

Monitors coolant temperature for fan control & gauge readings

Brand:
SMP - Corporate Logo
ES#:
4057464
Mfg#:
06A919501A
Back Ordered
$32.99

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

$31.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Assembly

Includes housing, gasket & sensor

Brand:
SMP - Corporate Logo
ES#:
4070681
Mfg#:
06B121111K
Back Ordered
$135.99

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

$132.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Filter Adapter

With an integrated oil separator We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
4865930
Mfg#:
06A115405BS
Special Order: No Guaranteed ETA
$332.99 USD
Free Shipping
on orders $49 and up

Expansion Tanks Breather Line

keep your engine temps where they are supposed to be! We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
4819061
Mfg#:
8W0121081ED
Special Order: No Guaranteed ETA
$15.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat (87°C)

Prevent overheating and premature engine wear. Includes O-ring

Brand:
Vernet - Corporate Logo
ES#:
4674381
Mfg#:
050121113C
Back Ordered
$12.99 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.

Let us help you find the parts that fit your Audi

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Manufacturer names and/or part numbers are used only for identification purposes.

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