DENSO Spark Plug Set (1985-89 MR2)

DENSO Spark Plug Set

For 1985–1989 Toyota MR2 AW11.

Overview

Choose a complete four-plug DENSO set for 1985–1989 U.S.-market MR2 AW11 4A-GE or 1988–1989 AW11 4A-GZE Supercharged. Both Double Platinum and Iridium TT choices are available for these MR2 applications, with engine-specific heat ranges.

DENSO was an original-equipment spark-plug supplier for the AW11 MR2. The Double Platinum configuration retains the platinum center-and-ground electrode construction specified for the factory application. Iridium TT provides a modern twin-tip alternative while retaining the corresponding engine-specific heat range. All four configurations are factory pre-gapped by DENSO: Double Platinum at 1.1 mm, matching the original engine specification; Iridium TT at its 1.0 mm factory preset.

Key Features

• Complete four-plug set for one listed four-cylinder engine
• Engine-specific heat ranges: DENSO 16 for 4A-GE and DENSO 20 for 4A-GZE
• Two plug technologies: Double Platinum and Iridium TT
• Factory pre-gapped: 1.0 mm for Iridium TT; 1.1 mm for Double Platinum
• 14 mm thread diameter and 19 mm reach across all configurations; 16 mm hex for both Double Platinum and Iridium TT
• Gasket / flat-seat design with solid terminals and resistor construction

Vehicle Fitment

Toyota MR2 — AW11 / MK1

• 1985–1989: U.S.-Market / 4A-GE Naturally Aspirated
• 1988–1989: U.S.-Market Supercharged / 4A-GZE

Fitment Notes

• Select the plug set by engine. The 4A-GE and 4A-GZE configurations use different heat ranges.
• Transmission coverage follows the original factory application: 1985 U.S.-market MR2 4A-GE is manual; automatic and manual applications are otherwise included only where factory offered.
• Engine swaps, turbo conversions, and altered boost or ignition configurations are outside this factory-engine application.

For the listed naturally aspirated AW11 4A-GE cars, the DENSO Ignition Wire Set is available separately. It does not fit 4A-GZE applications.

Product Specifications

Brand: DENSO
Product Type: Ignition
Component Type: Spark Plug
Quantity: 4 spark plugs per selected configuration
Thread Diameter: 14 mm
Thread Reach: 19 mm
Hex Size: 16 mm across all configurations
Seat Type: Gasket / flat seat
Terminal Type: Solid
Resistor: 5 kΩ
Factory Pre-Gapped: 1.0 mm for Iridium TT; 1.1 mm for Double Platinum

Which Spark Plug Is Right for You?

Double Platinum — Best for Factory-Style Replacement

Choose Double Platinum for the listed stock AW11 applications when you want factory-style platinum electrodes and everyday value. Platinum on both the center and ground electrodes resists electrode wear for long service life.

Iridium TT — Best for Regular Driving & Long Service Life

Choose Iridium TT if you drive regularly and want DENSO's long-life plug option, with fine-wire iridium and platinum electrodes designed to resist wear. A noticeable performance gain over correctly functioning Double Platinum plugs is not guaranteed.

Our Recommendation: Match the plug set to your factory MR2 engine first. Choose Double Platinum for factory-style replacement or Iridium TT for regular driving and long service life.

Available Configurations

Choose the factory engine and plug type. Every combination includes (4) matching DENSO spark plugs, each with its sealing washer.

1. Engine

• 4A-GE Naturally Aspirated
• 4A-GZE Supercharged

2. Plug Type

• Double Platinum
• Iridium TT

Both plug types are offered for each engine.