<font color='blue'>Blue</font> sensor with square connector. Please check existing sensor color
For vehicles with VIN up to 3B-X-491,580, split is in the 1999 model year.
This kit includes both essential firewall lines, one connecting the heater core to the cylinder head flange, and the other connecting it to the hard water pipe.
2X Entries Into Our F80 M3 Sweepstakes
Brand:
ES#:
5482644
Mfg#:
8D0819373NKT
Ships in 3 Business Days
$46.99
This product was last offered at the strikethrough price on 08-13-2026
Located on the back of the cylinder head
2X Entries Into Our F80 M3 Sweepstakes We Price Match - Give Us A Call or Chat! For vehicles with AUG or AWM engine codes only.
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
