Coolant Temperature Sensor (ECT) for Maruti Suzuki Swift — Price, Symptoms & Replacement Guide
Category: Cooling | Failure Severity: High | Replacement Cost in India: ₹1,200–₹5,000
What is the Coolant Temperature Sensor (ECT)?
Measures engine coolant temperature and sends data to ECU for engine management.
How the Coolant Temperature Sensor (ECT) Works
Uses a thermistor whose resistance changes with temperature and communicates data to ECU.
Why the Coolant Temperature Sensor (ECT) is Important
Critical for fuel injection, ignition timing, and cooling fan operation.
Common Problems with the Coolant Temperature Sensor (ECT)
- Incorrect temperature readings
- Sensor failure
Warning Symptoms of a Failing Coolant Temperature Sensor (ECT)
- Engine overheating
- Poor mileage
- Hard starting
- Cooling fan not working
Common Causes of Coolant Temperature Sensor (ECT) Failure
- Wear and tear
- Electrical faults
- Coolant contamination
Impact on Car Performance
Reduced efficiency, increased fuel consumption, and overheating risk.
DIY Fix Guide — Step by Step
- Check wiring
- Scan ECU for error codes
- Replace faulty sensor
Maintenance Tips
- Use proper coolant
- Avoid overheating cycles
Coolant Temperature Sensor (ECT) Replacement Cost in India
Expect to pay between ₹1,200 and ₹5,000 for genuine parts plus labour at an authorised Maruti Suzuki workshop. Local garages and aftermarket parts can be 20–40% cheaper but may compromise warranty.
Where to Buy Coolant Temperature Sensor (ECT) Online
Search trusted Indian car-parts retailers like Boodmo, Amazon India and Flipkart for genuine and OEM-grade Coolant Temperature Sensor (ECT) listings.
When to Replace the Coolant Temperature Sensor (ECT)
When ECU shows faulty readings or overheating issues persist.