BRAND NEW *OEM Quality* Engine Coolant Temperature Sensor to suit Daewoo Lanos, Nubira, Leganza and Espero.

Erratic temperature gauge, a cooling fan that never cuts in, or hard starting when cold? A failed coolant temperature sensor is a common cause on these engines. This is a direct-fit replacement with the correct 2-pin oval connector, dispatched same-day from Cranbourne VIC.

TO SUIT

This sensor suits the Daewoo Lanos KLAT, Nubira J100 and J150, Leganza KLAV, Espero KLEJ, Cielo and Tacuma U100, from 1995 to 2004. It also covers the Opel Astra GTC and Insignia G09 turbo models and the Saab 9-5 YS3G.

FITMENT CHECK

This is the 2-pin oval connector sensor with a 3/8 inch x 18 NPTF thread and 19mm spanner flats. Check your original sensor matches before ordering.

OEM PART NUMBERS

12146312
15326386
25036979
1236302
6238236

OTHER PART NUMBERS

VEMO: V40-72-0330-1
WALKER PRODUCTS: 211-1012
DELPHI: TS10075-12B1
MEYLE: 614 821 0004

PACKAGE INCLUDES

1 x Engine Coolant Temperature Sensor - 2-pin oval connector.

ABOUT THIS SENSOR

The coolant temperature sensor reports engine temperature to the ECU, which uses it to set the cold-start fuel enrichment, trigger the thermo fan, and correct ignition timing. The gauge on the dash is driven from the same signal on most of these cars.

These GM-family engines share one sensor design across Daewoo, Opel and Saab, which is why a single part number covers cars that otherwise have nothing in common. When the sensor drifts the ECU is told the engine is colder than it is, so it keeps adding fuel long after warm-up.

COMMON SYMPTOMS OF FAILURE

Check engine light with DTC P0117 or P0118
Temperature gauge reading erratically or sitting cold
Thermo fan running constantly or never cutting in
Hard starting when the engine is cold
Poor fuel economy and black smoke on start-up
Engine overheating without warning on the gauge

[1995 - 1997] DAEWOO CIELO Hatchback 1.5 16V (1.5L 4cyl A15MF 66kW)
[1995 - 1997] DAEWOO CIELO Sedan 1.5 16V (1.5L 4cyl A15MF 66kW)
[1995 - 1997] DAEWOO ESPERO KLEJ Sedan 2.0 (2.0L 4cyl C20LE 77kW)
[1995 - 1997] DAEWOO ESPERO KLEJ Sedan 2.0 (2.0L 4cyl C20JE 84kW)
[1997 - 2003] DAEWOO LANOS KLAT Hatchback 1.5 (1.5L 4cyl A15SMS 63kW)
[1997 - 2003] DAEWOO LANOS KLAT Hatchback 1.6 16V (1.6L 4cyl A16DMS 78kW)
[1997 - 2003] DAEWOO LANOS KLAT Sedan 1.5 (1.5L 4cyl A15SMS 63kW)
[1997 - 2002] DAEWOO LANOS KLAT Sedan 1.6 16V (1.6L 4cyl A16DMS 78kW)
[1997 - 1999] DAEWOO LEGANZA KLAV Sedan 2.0 16V (2.0L 4cyl X20SED 98kW)
[1999 - 2004] DAEWOO LEGANZA KLAV Sedan 2.2 16V (2.2L 4cyl T22SED 100kW)
[1997 - 2000] DAEWOO NUBIRA J100 J150 Hatchback 1.6 16V (1.6L 4cyl A16DMS 78kW)
[1997 - 2000] DAEWOO NUBIRA J100 J150 Sedan 1.6 16V (1.6L 4cyl A16DMS 78kW)
[1998 - 2003] DAEWOO NUBIRA J100 J150 Sedan 2.0 16V (2.0L 4cyl X20SED 98kW)
[1997 - 2000] DAEWOO NUBIRA J100 J150 Wagon 1.6 16V (1.6L 4cyl A16DMS 78kW)
[1998 - 2003] DAEWOO NUBIRA J100 J150 Wagon 2.0 16V (2.0L 4cyl X20SED 98kW)
[1999 - 2002] DAEWOO NUBIRA J150 Sedan 2.0 16V (2.0L 4cyl X20SED 98kW)
[1999 - 2002] DAEWOO NUBIRA J150 Wagon 2.0 16V (2.0L 4cyl X20SED 98kW)
[2000 - 2004] DAEWOO TACUMA U100 MPV 2.0 (2.0L 4cyl T20SED C20SED 94kW)
[2012 - 2013] OPEL ASTRA GTC 2.0 OPC Turbo (2.0L 4cyl A20NFT B20NFT 206kW)
[2012 - 2013] OPEL INSIGNIA G09 Hatchback 2.8 V6 Turbo OPC 4x4 (2.8L V6 B28NER A28NER 239kW)
[2012 - 2013] OPEL INSIGNIA G09 Sedan 2.0 Turbo (2.0L 4cyl A20NFT 162kW)
[2010 - 2011] OPEL INSIGNIA G09 Sports Tourer 2.0 Turbo (2.0L 4cyl A20NFT 162kW)
[2012 - 2013] OPEL INSIGNIA G09 Sports Tourer 2.0 Turbo (2.0L 4cyl A20NHT A20NFT 162kW)
[2010 - 2012] SAAB 9-5 YS3G Volante 2.0 Turbo (2.0L 4cyl A20NHT 162kW)
[1972 - 1974] SAAB 99 Sedan 2.0 EMS (2.0L 4cyl B201 81kW)

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	CTS147-5
Brand	Aftermarket OEM Replacement
Part Numbers
Part Number	CTS147
Reference OEM Number	12146312
Other OEM Numbers	12146312, 15326386, 25036979, 1236302, 6238236
Related Part Numbers	CTS-016, TCS070, CTS1012, CS824, CTS147, OTS147
Trade Part Numbers	VEMO: V40-72-0330-1, WALKER: 211-1012, DELPHI: TS10075-12B1
Product Specifics
Other Details
Note	Always verify fitment using your vehicle's OEM part number.