Chery GM Water Temperature Sensor 1066001348 S11-3808013 0K50F-18840 39220-2X100

Water Temperature Sensor 1066001348/SII-3617011EA/S11-3808013/S11-3808010/S11-3808013CA/0K50F-18840/39220-2X100 For Chery

The sensor’s resistance varies with temperature as follows (reference values based on industry-standard NTC thermistor characteristics):

Note: At low temperatures, the sensor exhibits high resistance (high-impedance); at high temperatures, resistance is low (low-impedance). This resistance-temperature relationship is fundamental to the sensor’s operation and should be referenced when diagnosing sensor performance.

The Water Temperature Sensor (Part No. 1066001348) is an OEM-grade component originally designed for specific vehicle applications. This part number is recognized within the automotive industry and corresponds to the following reference information:

This sensor meets automotive industry safety and performance standards, guaranteeing reliability equivalent to original equipment. It is backed by rigorous testing for longevity and precision.

The 1066001348 water temperature sensor is designed for compatibility with a range of engine configurations, primarily serving vehicles manufactured between 2015 and 2018.

The sensor is compatible with the following engine configurations:

The sensor features a standardized threaded interface (M12 x 1.5) that enables secure installation across multiple engine types without requiring specialized tools. While designed specifically for the above applications, the universal threaded design may accommodate additional engine configurations with matching specifications.

Important: Always verify thread size (M12 x 1.5) and electrical connector compatibility with your specific vehicle application before purchase. For non-listed engine configurations, adjustable mounting brackets and thread adapters may be available to ensure proper fitment.

A failing or faulty water temperature sensor can manifest through various drivability and performance issues. Early recognition of these symptoms can prevent more serious engine damage and costly repairs.

One of the most common indicators of a faulty sensor is the illumination of the Check Engine Light on the dashboard. The ECU detects abnormal resistance values or signal patterns from the sensor and stores corresponding Diagnostic Trouble Codes (DTCs), such as:

• P0117 – Engine Coolant Temperature Circuit Low Input
• P0118 – Engine Coolant Temperature Circuit High Input

A faulty sensor may provide incorrect temperature data, resulting in erratic or inaccurate readings on the vehicle’s temperature gauge. The gauge may show the engine running cooler or hotter than it actually is, or the needle may fluctuate unpredictably.

Incorrect temperature readings can impair the ECU’s ability to enrich the air-fuel mixture during cold starts. This may result in:

• Difficulty starting the engine when cold
• Extended cranking times
• Engine stalling shortly after starting

When the sensor provides inaccurate temperature data, the ECU may incorrectly adjust the fuel delivery, often resulting in a richer-than-necessary air-fuel mixture. This condition leads to noticeably reduced fuel economy.

A faulty sensor can cause the ECU to maintain an elevated idle speed as part of its default or "limp-home" strategy. The engine may idle at higher RPMs than normal, even after reaching operating temperature.

If the sensor fails to detect rising coolant temperatures accurately, the ECU may not activate the cooling fan at the appropriate time. This can lead to engine overheating, one of the most serious consequences of sensor failure.

Inaccurate temperature data can disrupt the ECU’s calculations for ignition timing and fuel delivery, resulting in:

• Reduced engine power
• Rough idling
• Hesitation or surging during acceleration

A faulty sensor can cause elevated CO values and interference with the lambda (oxygen sensor) control loop, potentially causing the vehicle to fail emissions testing.

Visual inspection may reveal:

• Cracks in the sensor housing
• Coolant leaks around the sensor mounting area
• Corrosion on electrical connectors

The sensor may become stuck at a fixed temperature reading or exhibit an upward bias, failing to accurately track actual coolant temperature changes. The ECU interprets this lack of variation as a fault and sets a corresponding DTC.

When purchasing a replacement water temperature sensor (Part No. 1066001348), the following factors should be carefully evaluated to ensure proper fitment, reliable performance, and long service life.

Before purchasing, confirm that the sensor’s thread size (M12 x 1.5) matches your vehicle’s engine block or cylinder head mounting point. Additionally, verify that the electrical connector type matches your vehicle’s wiring harness. Connector mismatch is one of the most common installation issues encountered during replacement.

While the 1066001348 sensor is designed for Chery and Geely Vision models (2015–2018) with specific engine configurations (7.0D, 2.4, 1.0D), always cross-reference with your vehicle’s specific year, make, model, and engine displacement. If your vehicle falls outside the listed applications, consult with a qualified technician or parts specialist to determine suitability. Adjustable mounting brackets and thread adapters can be customized to fit non-listed engine configurations.

Opt for sensors manufactured with corrosion-resistant materials such as brass, which offer superior durability in high-temperature engine environments compared to plastic-based alternatives. A brass-bodied sensor provides:

• Enhanced resistance to thermal degradation
• Superior protection against coolant corrosion
• Longer operational lifespan

Temperature accuracy directly impacts engine performance and fuel efficiency. The 1066001348 sensor offers ±2°C temperature detection accuracy. Ensure that any replacement sensor meets or exceeds this accuracy specification to maintain optimal engine management.

When replacing a faulty water temperature sensor, it is advisable to inspect related cooling system components:

• Upper and lower coolant hoses for cracks, leaks, or deterioration
• Radiator for cracks, leaks, or damage
• Radiator cap for proper sealing
• Coolant level and condition

Always refer to the vehicle owner’s manual for the correct coolant type and replacement procedure.

Before installing the new sensor:

• Inspect the wiring harness connector for corrosion, damage, or loose pins
• Check for broken or frayed wires
• Clean connector terminals if necessary
• Ensure a secure, weather-tight connection upon installation

While the symptoms listed above can indicate a faulty water temperature sensor, many of these symptoms can also be caused by other issues such as:

• Faulty coolant thermostat
• Wiring harness problems
• ECU issues
• Cooling system leaks

It is recommended to have the vehicle properly diagnosed using a scan tool to read stored DTCs before replacing the sensor. This ensures that the sensor is indeed the root cause of the symptoms and prevents unnecessary parts replacement.

• Allow the engine to cool completely before attempting sensor removal or installation to prevent burns from hot coolant
• Apply a small amount of thread sealant (compatible with coolant systems) to the sensor threads to prevent leaks
• Tighten the sensor to the manufacturer’s specified torque value (avoid over-tightening, which can damage the sensor or the mounting point)
• After installation, check coolant level and top up if necessary
• Start the engine and check for leaks around the sensor mounting area
• Verify that the temperature gauge operates correctly and the Check Engine Light (if illuminated) has been cleared

If the sensor is not installed immediately, store it in a cool, dry environment within the specified storage temperature range (-30°C to +160°C). Avoid dropping or subjecting the sensor to mechanical shock, as this can damage the internal thermistor element.

When purchasing from a supplier, review the warranty coverage and return policy. Quality sensors should be backed by appropriate warranty protection against manufacturing defects. Keep the original packaging and proof of purchase for warranty claims if needed.

The water temperature sensor contains a semiconductor thermistor that exhibits a predictable change in electrical resistance in response to temperature variations. Installed in the engine cylinder block or cylinder head water jacket, the sensor makes direct contact with the cooling water to accurately measure engine coolant temperature.

The ECU supplies a reference voltage (typically 5V DC) to the sensor. As the thermistor resistance changes with temperature, the voltage drop across the sensor varies proportionally:

• Low coolant temperature → High resistance → High voltage signal to ECU
• High coolant temperature → Low resistance → Low voltage signal to ECU

The ECU converts this voltage signal into a temperature reading and uses it for critical engine management calculations.

Common failure modes include:

• Condensation damage – Moisture ingress can cause internal corrosion
• Electrical connection failure – Corroded or loose connector pins
• Internal thermistor failure – Open or short circuit conditions
• Physical damage – Cracks from thermal stress or mechanical impact