Seals the expansion tank cap to the reservoir. 28.5x3.8
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms We Price Match - Give Us A Call or Chat!
Install a new o-ring for a proper seal. 36x3.15
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Connects the lower radiator port to the water pump and expansion tank
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For vehicles with AEB or ATW engine codes only, with VIN from 8D-Y-120001, split is in the 2000 model year.
Brand:
ES#:
3463131
Mfg#:
4B0121055F
In Stock
ON SALE!
SAVE 36%
$41.99
This product was last offered at the strikethrough price on 05-02-2026
Includes integrated coolant level sensor, does not include cap
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Si-OAT technology specifically engineered for modern BMW, VW, Audi, and Porsche vehicles.
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Brand:
ES#:
5435259
Mfg#:
904683
Back Ordered
$25.99
This product was last offered at the strikethrough price on 05-07-2026
Includes integrated coolant level sensor
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms We Price Match - Give Us A Call or Chat!
Replacement 4 pin relay
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms We Price Match - Give Us A Call or Chat! Used for fan control
Brand:
ES#:
3143292
Mfg#:
443951253J
Back Ordered
$21.99
This product was last offered at the strikethrough price on 05-07-2026
Located on the lower side of the radiator
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Revised green 4 pin sensor, located in the cooling flange located on the side of the cylinder head
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For vehicles with VIN from 3B-X-491,581, split is in the 1999 model year.
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.
Lifetime Replacement
