The coolant temperature sensor tends to give little warning before symptoms start cascading across the engine. A flickering temperature gauge, a constantly running cooling fan, a sudden drop in fuel economy, or a check engine light with a P0115-P0119 fault code all point to a faulty unit.The sensor threads into the cooling circuit, usually near the thermostat housing or cylinder head, feeding live coolant data to the ECU so it can adjust fuel mixture, ignition timing, and fan operation. A bad sensor can make the ECU dump excess fuel into the engine or run the car too hot, both of which damage components over time.Parthunt24 groups used coolant temperature sensor listings from marketplaces like eBay, Ovoko, RicambiPro, Opisto, Proxyparts, Ecooparts, Autoparts-24, Totalparts. Compare 83 options on price, condition, and fitment, then head to the marketplace once you've found the right sensor.

How to choose the right coolant temperature sensor for your car?

A coolant temperature sensor (CTS), also called an engine coolant temperature (ECT) sensor or engine temperature sensor, measures coolant temperature and sends data to the ECU to manage fuel injection, ignition timing, and cooling fans. A faulty sensor causes poor fuel economy, overheating, rough idle, or a check engine light, often with codes P0115-P0119. It is usually located near the thermostat housing.The OEM part number needs to match your engine code first, after which the connector, thread size, and whether the sensor is single-output or dual-output all need confirming. Set your make and model into the side filters on the Parthunt24 results page to trim the list to fitting sensors. Each entry redirects to the marketplace it's hosted on, where the full part description and checkout happen on the seller's site.

Vehicle & engine compatibility: Match make, model, year, engine code, and OEM part number.
Sensor type: Single-output (gauge or ECU) vs dual-output sensor.
Connector type: Verify the plug shape, pin count, and wiring compatibility.
Thread size & pitch: Ensure the correct thread dimensions for a proper fit.
Mounting location: Confirm fit for the cylinder head, thermostat housing, or radiator.
Temperature range: Must match the OEM resistance/temperature curve.
ECU compatibility: Ensure proper communication with the engine control unit.
Seal type: Check the O-ring, washer, or thread seal design.
Number of pins: Typically 1, 2, or more; must match the original.

What to check before buying a coolant temperature sensor

Check every detail of the listing carefully before placing the order. A sensor that reads inaccurately will still bolt up cleanly and look fine in a photo, so the seller's testing notes matter more than they do on most parts.

Photos: Sharp images of the sensor body, thread, and connector pins.
Seller reputation: Feedback score, length of time trading, and review history.
Compatibility: OEM number checked against your engine code.
Included components: Sensor only, or with O-ring, washer, or pigtail?
Condition: Corrosion at the connector, damaged threads, signs of overheating.
Testing: Confirmation the sensor was reading correctly when removed.
Warranty and returns: A clear path if the part is wrong or faulty.

If the listing holds up, complete the buy on the seller's marketplace.

How much does a coolant temperature sensor cost?

Coolant temperature sensor price varies with the vehicle and the sensor type. Used single-output sensors open at €4-€12, dual-output units sit at €15-€40, and OEM sensors for premium or specialist applications push past €70.Searching Parthunt24, coolant temperature sensor listings start from as low as 5.00. Factors that move coolant temperature sensor price up or down:

Type: Single-output sits below dual-output on price.
Brand: OEM sits at the top; quality aftermarket sits below.
Vehicle rarity: Common engines are cheaper; specialist applications cost more.
Inclusions: O-rings, washers, or pigtails bundled add to the price.

On Parthunt24, coolant temperature sensor listings sit together so the strongest value across sellers stands out quickly.

Faulty coolant temperature sensor? Inspect these other parts too

Coolant sensor faults don’t often show up by themselves. Coolant leaks, scale build-up, or a stuck thermostat can produce identical symptoms to a failed sensor, so check the whole circuit before fitting a new one. Browse these on Parthunt24 alongside the sensor:

Thermostat: Stuck-open or stuck-closed valves mimic sensor faults.
ECU: Bad sensor data confuses the ECU; in rare cases the unit itself is at fault.
Thermostat housing: Cracked plastic housings cause leaks blamed on the sensor.
Cylinder head: Worth inspecting if the engine has run hot.
Cooling fan: A faulty sensor often triggers constant fan running.

Coolant temperature sensors at unbeatable prices on Parthunt24

A weekend shouldn't disappear into searching for a coolant temperature sensor. Parthunt24 pulls listings from every major used-parts marketplace into one filterable view, with prices, condition notes, and seller details all on the same page. Car temperature sensors across single-output and dual-output types appear together, sortable by whichever criteria matter most. A single search now does the job of an afternoon spent flipping between sites. Compare offers, lock in the best deal, and order a coolant sensor today through Parthunt24.