Coolant Temperature Sensor for Jeep Wrangler JK JL 2007-2025 5149077AA

BRAND NEW *OEM Quality* coolant temperature sensor to suit Jeep Wrangler JK and JL 3.6L and 3.8L V6 petrol engines.

A failed coolant temperature sensor can trigger inaccurate engine temperature readings, poor fuel economy, or an illuminated check engine light. Dispatched same-day from Cranbourne VIC.

TO SUIT

Fits Jeep Wrangler JK (2007-2018) with the 3.8L V6 and later 3.6L Pentastar V6, and Wrangler JL (2018-2025) with the 3.6L VVT Pentastar. This is the correct engine-coolant sensor for the Wrangler's inline four-cylinder-free V6-only engine lineup - see the full build-date list below.

FITMENT CHECK

On the 3.6L Pentastar (ERB) engine fitted from late 2011, this coolant sensor location is separate from the oil temperature sensor - they are not interchangeable. Confirm your engine bay position before ordering.

OEM PART NUMBERS

5149077AA
5149077AB
5149096AA
5149096AB
68045803AA
68060339AA
K05149077AA
K05149077AB

OTHER PART NUMBERS

WALKER PRODUCTS: 211-1130
HELLA: 6PT 358 385-351
DELPHI: TS10330
TRIDON: TCS191

PACKAGE INCLUDES

1 x OEM Quality Coolant Temperature Sensor (2-pin connector, 3/8" NPTF thread)

ABOUT THIS SENSOR

The coolant temperature sensor measures engine coolant temperature and reports it to the ECU, which uses this reading to control fuel mixture, ignition timing, cooling fan operation and the dash temperature gauge. Wranglers spend more time idling at low road speed and low airflow off-road than most vehicles on this platform, which puts extra load on accurate coolant readings for fan control.

A failed sensor commonly shows up as the electric fan running constantly (even with the engine cold) or an inaccurate temperature gauge - both worth checking before assuming a bigger cooling system fault off-road.

COMMON SYMPTOMS OF FAILURE

Check engine light illuminated (fault codes P0115-P0118)
Inaccurate or erratic temperature gauge reading
Cooling fan running constantly, including from a cold start
Poor fuel economy or rough cold-start idle
Engine running rich or lean
Black smoke from exhaust on startup

[01/07 - 12/12] JEEP WRANGLER JK Open Off-Road Vehicle 3.8 (3778cc 146kW (Petrol), Open Off-Road Vehicle)
[01/11 - 12/19] JEEP WRANGLER JK Open Off-Road Vehicle 3.6 V6 (3604cc 209kW (Petrol), Open Off-Road Vehicle)
[01/18 - 12/25] JEEP WRANGLER JL Open Off-Road Vehicle 3.6 VVT (JL72, JL74) (3604cc 209kW (Petrol), Open Off-Road Vehicle)

How do I test a coolant temperature sensor?

The most common test is to measure the sensor resistance with a multimeter at a known coolant temperature and compare against the manufacturer resistance curve. A cold engine (20 degrees C) typically reads 2,000 to 3,000 ohms and drops to around 200 to 300 ohms at operating temperature (90 degrees C). An OBD2 scanner showing a fixed temperature reading that does not change as the engine warms up is also a strong indicator of sensor failure.

Can a faulty coolant temperature sensor cause my engine to overheat?

Indirectly yes. If the sensor reports a lower temperature than actual, the ECU may not activate the cooling fan at the correct time, allowing the engine to overheat. It can also suppress the dashboard warning light, meaning you may not be alerted until the engine is already at a dangerously high temperature. Replace a suspected faulty sensor promptly.

Do I need to drain the coolant to replace the sensor?

Not always - many coolant temperature sensors can be replaced quickly with minimal coolant loss if you work fast and have a replacement ready to thread in immediately. However on some vehicles the sensor location requires partial coolant drainage. Check the sensor position on your specific engine before starting. Always use fresh coolant when topping up after replacement.

What are the symptoms of a faulty coolant temperature sensor?

Symptoms include poor fuel economy, black smoke, engine overheating warning, incorrect temperature gauge reading, hard starting when cold, and rough idle. Fault codes P0115 to P0119 are commonly associated with coolant temperature sensor faults.

Is it safe to drive with a bad coolant temperature sensor?

A faulty coolant temperature sensor can cause the ECU to run rich fuel mixtures and prevent the cooling fan from operating correctly, risking engine overheating. Replace it promptly - it is a low-cost part that can prevent expensive engine damage.

How do I know if my coolant temperature sensor or my thermostat is faulty?

A faulty thermostat typically causes the engine to overheat or never reach operating temperature. A faulty coolant temp sensor causes incorrect gauge readings and running issues but the coolant itself may be at the correct temperature. An OBD2 scanner showing live coolant temp data helps distinguish between the two.

Are there two coolant temperature sensors on my vehicle?

Many vehicles have two sensors - one for the ECU (engine management) and one for the dashboard temperature gauge. They look similar but are not interchangeable. Check your vehicle's service manual or contact us with your vehicle details to confirm which sensor you need.

Identification
SKU	CS884_WRANGLER
Brand	Aftermarket OEM Replacement
Part Numbers
Part Number	CS884
Reference OEM Number	5149077AA
Other OEM Numbers	5149077AA, 5149077AB, 5149096AA, 5149096AB, 68045803AA
Related Part Numbers	TCS191, CTS2021
Trade Part Numbers	WALKER: 211-1130, HELLA: 6PT 358 385-351, DELPHI: TS10330
Product Specifics
Product Type	SENSOR
Sensor Type	Coolant Temperature Sensor
Thread Size	3/8" x 18 NPTF
Spanner Size	19mm
Number of pins	2-Pin
Housing Colour	Black
Mounting Type	Bolted
Compatible Makes	Jeep
Fitment Type	Direct Replacement
Other Details
Note	Must be installed/removed by a qualified technician.