Walker Products 211-1027 Engine Coolant Temperature Sender

The Walker Products 211-1027 Engine Coolant Temperature Sender is an OE replacement component engineered to monitor coolant temperature and transmit real-time data to either the engine control unit (ECU) or the instrument cluster. By using a thermistor that changes electrical resistance in response to temperature shifts, the sender gives the ECM the input it needs to regulate fuel injection timing, cold-start enrichment, cooling fan activation, and emission system readiness.

Key Features:

• Transmits real-time coolant temperature data to the ECU or dashboard gauge for accurate engine monitoring
• Matches the OE resistance curve and thermal response rate for seamless integration with factory engine management systems
• Manufactured to meet or exceed OEM specifications for resistance values, thermal response, and mounting thread type
• Built with high-temperature, corrosion-resistant materials designed to withstand pressurized coolant, vibration, and extreme thermal cycling
• Direct-fit replacement installs into the factory threaded port — typically in the engine block, thermostat housing, or intake manifold — with no modifications required
• Produced in an ISO 9001:2008 / TS16949 certified facility and 100% tested before shipment

Common symptoms of a failing coolant temperature sender include hard starts, engine flooding, poor fuel economy, erratic temperature gauge readings, and an illuminated check engine light. Replacing a faulty sender with the Walker 211-1027 restores accurate temperature monitoring, supports proper engine warm-up cycles, and helps maintain fuel efficiency and emissions compliance. Routine inspection is recommended every 25,000–35,000 miles as part of a complete cooling system service.