BRAND NEW *OEM Quality* engine coolant temperature sensor to suit Ford Laser KJ, KL and KN and Mazda 323 Protege, 323 Astina and 121 Metro.

On these cars the tell is a temperature gauge that never quite reaches the middle and an engine that feels flat until it is properly warm. A new sensor fixes both. Express delivery Australia-wide.

TO SUIT

Ford Laser KJ and KL sedan and hatch with B6 and BP, built from January 1998
Ford Laser KN with B6, BP, ZM and ZM39
Mazda 323 Protege BA and BJ with 1.6 and 1.8
Mazda 323 Astina BJ with 1.6
Mazda 121 Metro DW to December 1999

FITMENT CHECK

Laser KJ and KL fitment starts at January 1998. Earlier builds of the same model code take a different sensor, so check your build date before ordering.

OEM PART NUMBERS

1448377
6M34-12A648-AA
6M3412A648AA
KLK1-18-840
KLK118840

OTHER PART NUMBERS

VEMO: V70-72-0120-1
WALKER: 211-1117
MTE-Thomson: 4255
Goss: CS844
TCS125
CTS-030
TX85

PACKAGE INCLUDES

1 x engine coolant temperature sensor with 3-pin triangular plug and seal ring.

ABOUT THIS SENSOR

The Laser and 323 are the same car under different badges and share the B6 and BP engines, so the sensor and its failure pattern are identical across both. It threads into the coolant outlet housing at the head.

These cars are now old enough that the original sensor is almost always still fitted. Corrosion at the plug is as common a cause of a bad signal as the sensor element itself, so inspect the connector while the part is out.

COMMON SYMPTOMS OF FAILURE

Fault codes P0115, P0117 or P0118 stored
Temperature gauge reading low or not moving
Poor cold running and hesitation until warm
Radiator fan running constantly or never switching on
Heavy fuel use and a rich exhaust smell
Hard starting when the engine is already hot

[1998 - 1999] FORD LASER KJ,KL (1.6L 4cyl B6 79kW)
[1998 - 1999] FORD LASER KJ,KL (1.6L 4cyl B6 80kW)
[1998 - 1999] FORD LASER KJ,KL (1.8L 4cyl BP 90kW)
[1998 - 1999] FORD LASER KJ,KL (1.8L 4cyl BP 92kW)
[1999] FORD LASER KN (1.6L 4cyl B6 77kW)
[1999 - 2001] FORD LASER KN (1.8L 4cyl BP 92kW)
[2000 - 2001] FORD LASER KN (1.6L 4cyl ZM 79kW)
[2000 - 2001] FORD LASER KN (1.6L 4cyl ZM39 79kW)
[1996 - 1999] MAZDA 121 METRO DW (1.3L 4cyl B33L/B34P/B35J 53kW)
[1996 - 1999] MAZDA 121 METRO DW (1.5L 4cyl B5C5 64kW)
[1998 - 2002] MAZDA 323 ASTINA MKVI (1.6L 4cyl ZM 72kW)
[1996 - 1998] MAZDA 323 PROTEGE MKV (1.6L 4cyl D6DK 80kW)
[1998 - 2004] MAZDA 323 PROTEGE MKVI (1.8L 4cyl FP-DE 92kW)

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	CCS93-1
Brand	Aftermarket OEM Replacement
Part Numbers
Part Number	CCS93
Reference OEM Number	1448377
Other OEM Numbers	1448377, 6M34-12A648-AA, KLK1-18-840, KLK118840
Related Part Numbers	CTS-030, TCS125, CS844, TX85
Trade Part Numbers	VEMO: V70-72-0120-1, WALKER: 211-1117, MTE-Thomson: 4255
Product Specifics
Product Type	SENSOR
Sensor Type	Coolant Temperature Sensor
Manufacturer Warranty	1 Year
Thread Size	M12x1.5
Spanner Size	19mm
Number of pins	3-Pin
Connector Shape	triangular
Supplementary Article Info	with seal ring
Housing Colour	Grey
Mounting Type	Threaded
Compatible Makes	Ford / Mazda
Fitment Type	Direct Replacement
Other Details
Note	3-pin triangular plug, M12x1.5 thread, 19mm spanner
Unit Of Measure	ea