Direct OE-quality replacement thermostat to cure overheating issues, resolve poor cabin heater performance, and ensure your engine reaches and maintains its ideal operating temperature.
Prevent catastrophic engine overheating and timing belt failure on your classic 1.8T or 2.0L 8V engine.
We Price Match - Give Us A Call or Chat! For vehicles with AUG or AWM engine codes only.
<font color='blue'>Blue</font> sensor with square connector. Please check existing sensor color - 078919501B
For vehicles with VIN up to 3B-X-491,580, split is in the 1999 model year.
The most common failure points in your cars cooling system
10X Entries Into Our F80 M3 Sweepstakes For vehicles with AEB or ATW engine codes only, with VIN up to 8D-Y-120000, split is in the 2000 model year.
Brand:
ES#:
4265562
Mfg#:
4B0121055KT3
Back Ordered
ON SALE!
$148.99
This product was last offered at the strikethrough price on 08-20-2026
The most common failure points in your cars cooling system
For vehicles with AEB or ATW engine codes only, with VIN from 8D-Y-120001, split is in the 2000 model year.
Brand:
ES#:
4265560
Mfg#:
4B0121055KT
Back Ordered
$479.70
This product was last offered at the strikethrough price on 07-26-2026
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
