1 4

Honda

Honda 37870-PLC-004 Genuine Engine Coolant Temperature Sensor

Honda 37870-PLC-004 Genuine Engine Coolant Temperature Sensor

$53.75
Shipping cost is calculated at checkout. Enter the address to find out the delivery time and cost.

 

Genuine Honda 37870-PLC-004 Engine Coolant Temperature Sensor — OEM Part
✔ Fitment: R18A, D17A, and L15A engines in Honda Civic (2001–2011), Fit (2007–2008), and select Acura models
✔ Direct replacement for factory sensor — no modifications required
✔ Manufactured to Honda’s original specifications — correct thread (M10x1.25) and 2-pin connector
✔ Genuine OEM quality — ensures accurate gauge and ECU readings
✔ Direct bolt-on replacement — plugs directly into the factory harness


Genuine Honda 37870-PLC-004 Engine Coolant Temperature Sensor

A temperature gauge that reads high when the engine is actually cold, a cold reading when the engine is warm, erratic gauge fluctuations, poor fuel economy, or a heater that takes a long time to warm up — these are common symptoms of a failing coolant temperature sensor . The sensor measures coolant temperature and sends a signal to the ECU and the dashboard gauge . The ECU uses this data to adjust fuel delivery and ignition timing, so a faulty sensor can cause the engine to run rich, burn more fuel, and produce a warning light or erratic coolant readings .

This is a factory-original Honda sensor. It is built with a thermistor calibrated to the specific resistance curve of the engines it supports, ensuring that your ECU and gauge receive exact temperature readings.

When to Replace

When to Replace (Common Symptoms)• Temperature gauge reads hot with no actual overheating
• Temperature gauge reads cold when the engine is warm
• Gauge readings fluctuate wildly
• Poor fuel economy
• Heater takes an extended time to warm up
• Check engine light with diagnostic trouble codes P0115 to P0119

Product Details & Highlights

Product Highlights• ✔Genuine Honda OEM— not an aftermarket or Chinese replica
• ✔Precision thermistor— matches the correct resistance curve
• ✔Direct bolt-on replacement— no modifications needed
• ✔Manufactured to Honda’s strict quality standards• ✔Backed by Honda’s manufacturer warranty(valid through any authorized dealer)

Package Contents

Package Contents• 1 × Honda 37870-PLC-004 engine coolant temperature sensor (genuine)

FAQ

FAQ

Is this a genuine Honda part or a copy?
This is 100% genuine Honda OEM — in original factory packaging with the Honda part number printed on the label. It is not an aftermarket brand or a replica .

Does this fit my 2006 Honda Civic with the R18A engine?
Yes — the 2006 Civic with the R18A engine uses this sensor . We recommend verifying with your VIN.

Does this sensor control the cooling fans?
Yes — this sensor is used to monitor engine temperature for cooling fan control .

Can I use this sensor on a different Honda model?
This sensor is designed for the specific engine families listed in the Fitment Table. Other Honda models may require a different sensor.

What is the torque spec for installation?
The sensor is typically hand-tightened into the engine block and then secured with a wrench. Always refer to your vehicle's service manual for the correct installation procedure and torque specification.

Does this sensor come with a new O-ring or washer?
Most genuine Honda sensors include the required sealing washer or O-ring. Please verify the packaging to confirm.

How do I know if my sensor is bad?
Common signs include a temperature gauge that doesn't match the engine's actual operating condition, poor fuel economy, or a check engine light with a coolant temperature code .

View full details