AW11 NTK Engine Coolant Temperature Sensor (1984-89 MR2)

NTK Engine Coolant Temperature Sensor

For 1984–1989 Toyota MR2 AW11 equipped with the matching original coolant-sensor connector.

Overview

This NTK coolant-temperature sensor provides the engine ECU with the temperature input used to adjust fueling. It fits 1984–1989 Toyota MR2 AW11 with the specified naturally aspirated 4A-GE or supercharged 4A-GZE applications and original sensor connections.

The wire-clip and molded-latch options use different connector interfaces. Match the original connector and the production limits below, particularly around the August 1988 changeover. Both are thermistor-based replacement sensors; neither replaces the dashboard temperature-gauge sender.

Key Features

• Engine-management coolant input for the specified MR2 applications
• Brass threaded sensor body with an integral sensing probe
• Two male blade terminals within one rectangular female connector housing
• Wire-clip and molded-latch options matched to the original harness connection
• Thermistor-based temperature sensing with no attached wiring harness

Vehicle Fitment

Select the connector option matching the original sensor connection and the production range.

Toyota MR2 — AW11 / MK1

• 1984–1988: JDM / 4A-GE naturally aspirated; 1984–August 1988 production; wire-clip connector
• 1986–1988: JDM / 4A-GZE Supercharged; August 1986–August 1988 production; wire-clip connector
• 1985–1988: U.S.-Market / 4A-GE naturally aspirated; December 1984–August 1988 production; wire-clip connector
• 1988: U.S.-Market / 4A-GZE Supercharged; August 1987–August 1988 production; wire-clip connector
• 1988–1989: JDM / 4A-GE naturally aspirated or 4A-GZE Supercharged; August 1988–1989 production; molded-latch connector
• 1989: U.S.-Market / 4A-GE naturally aspirated or 4A-GZE Supercharged; August 1988–1989 production; molded-latch connector

Fitment Notes

• August 1988 is a shared transition month. Match the original connector housing, keying and retention style; year, color or two-terminal count alone cannot distinguish these options. A missing or broken wire clip does not turn an early connector into the molded-latch type.
• Does not replace the dashboard gauge sender, cooling-fan switch, cold-start time switch or EGR-temperature sensor.
• Engine swaps, altered wiring or connectors, ECU changes, adapters and replacement sensor housings require configuration-specific fitment confirmation.
• The 1984 MR2 application is JDM only. U.S.-market coverage starts with the 1985 model year. Supercharged coverage starts in 1986 JDM production and the 1988 U.S. model year.

Product Specifications

Brand: NTK
Product Type: Engine coolant temperature sensor
Construction: Brass threaded body
Sensing Element: Thermistor
Connector: One rectangular female housing; wire-clip or molded-latch interface by option
Terminals: Two male blade terminals
Hex Size: 19.00 mm wire-clip option / 19.05 mm molded-latch option
Attached Wire Quantity: 0

Available Configurations

Wire-Clip Connector | MR2 1984–08/1988 Production

• (1) NTK engine coolant temperature sensor
• (1) External sealing washer

Molded-Latch Connector | MR2 08/1988–1989 Production

• (1) NTK engine coolant temperature sensor

A sealing washer is not included with the molded-latch option.

Important: A wiring harness, mounting bracket, mounting hardware and thread sealer are not included with either option.