Ignitions and Electrical› Wiring Components

BLUE SEA

TEMPERATURE SENSOR UNIVERSAL

$33.93

SKU: B03C 1821-BSS

In Stock
In Stock
Ships by Jun 19
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The Blue Sea Systems 1821-BSS is a high-temperature sensor designed for sensing raw water exhaust. It attaches to the outside of the exhaust hose without requiring holes to be drilled. The sensor offers multiple mounting options and is non-submersible with an IP65 rating, meaning it is protected against jets of water. Its wires can connect in either order.

Fitment

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandBLUE SEA
Part NumberB03C 1821-BSS

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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