Sierra Thermostat 18-3545
- Brand:
- Sierra
- Part no:
- 18-3545
Where to buy
View on Amazonpaid link
This is the Sierra 18-3545 thermostat, a part that also carries the number 437090. It is a replacement thermostat for the engine range named in Sierra's application information. The application covers the E115 (1997), plus the E135, E150 and E175 (2000-06). Sierra points to its catalog for complete application information, so check your engine and year against it before you swap one in.
Our take
The application names the E115 (1997) and the E135, E150 and E175 (2000-06), so matching your engine and year against that run is the way to confirm this thermostat before you pull the old one.