Coolant Temperature Sensor

Maintain accurate engine temperature monitoring with this premium coolant temperature sensor (SKU 17-066). This OEM-quality sensor is engineered to precisely measure engine coolant temperature, providing critical data to your vehicle's ECU for optimal fuel delivery, ignition timing, and cooling system operation. Compatible with a wide range of BMW 3-Series, 5-Series, 8-Series, M3, X5, and Z3 models.

CLICK HERE TO CHECK IF THIS FITS YOUR VEHICLE.

Key Features & Benefits

• OEM-Grade Quality - Manufactured to original equipment specifications
• Precise Temperature Monitoring - Accurately measures coolant temperature for optimal engine management
• Optimized Engine Performance - Ensures correct fuel mixture and ignition timing based on engine temperature
• Enhanced Fuel Efficiency - Helps maintain optimal air-fuel ratios during warm-up and operation
• Durable Construction - Built to withstand extreme temperatures and harsh engine bay conditions
• Direct Replacement - Easy installation with OEM-compatible connector
• Reliable Operation - Prevents overheating and cold-running issues

Technical Specifications

• Part Number: 17-066
• Sensor Type: Coolant Temperature Sensor (CTS)
• Primary Applications: BMW 3-Series, 5-Series, 8-Series, M3, X5, Z3
• Weight: 0.1 kg

Vehicle Compatibility

This coolant temperature sensor is designed for:

BMW 3-Series:

• BMW 316i
• BMW 318i
• BMW 323i
• BMW 325i
• BMW 328i

BMW 5-Series:

• BMW 520i
• BMW 523i
• BMW 525i
• BMW 528i
• BMW 530D
• BMW 530i
• BMW 535i
• BMW 540i

Other BMW Models:

• BMW 840Ci
• BMW M3
• BMW X5
• BMW Z3

Always verify fitment for your specific vehicle.

CLICK HERE TO CHECK IF THIS FITS YOUR VEHICLE.

OEM Part Number Cross-Reference

This coolant temperature sensor replaces the following OEM part numbers:

• BM13621703993
• CTS-066 / CTS066

Common Symptoms of Faulty Coolant Temperature Sensors

• Check engine light illuminated (P0115-P0119 codes)
• Poor fuel economy
• Rough idle or stalling when cold
• Engine overheating or running too cool
• Cooling fan running constantly or not at all
• Black smoke from exhaust during warm-up
• Difficulty starting when engine is cold
• Incorrect temperature gauge readings

What Does a Coolant Temperature Sensor Do?

The coolant temperature sensor (CTS) monitors the temperature of the engine coolant and sends this critical information to the engine control unit (ECU). The ECU uses this data to adjust fuel delivery, ignition timing, and cooling fan operation. During cold starts, the sensor signals the ECU to enrich the fuel mixture for smooth operation. As the engine warms up, it helps optimize performance and fuel efficiency.

Why Choose OEM-Quality Coolant Temperature Sensors?

OEM-quality coolant temperature sensors are engineered to meet or exceed original equipment specifications, ensuring accurate temperature readings across the full operating range. Inferior aftermarket sensors can provide incorrect readings, leading to poor performance, increased emissions, and potential engine damage. Quality sensors ensure reliable operation and long service life.

Why Choose LM15 Motorsport?

We supply premium OEM-quality engine sensors with fast shipping across Australia. Every part is carefully inspected to ensure you receive the exact component your vehicle needs for reliable performance and accurate engine management.