Link Engine Management
Link G4X MX5Link MX5NAX ECU – Mazda MX-5 NA & 323 GTX/GTR (1989–1997, 2-Plug ECU)
Link G4X MX5Link MX5NAX ECU – Mazda MX-5 NA & 323 GTX/GTR (1989–1997, 2-Plug ECU)
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The Link G4X MX5Link MX5NAX ECU is a plug-in standalone ECU designed for Mazda MX-5 NA (1989–1997) and Mazda 323 GTX/GTR models running the B6ZE(RS) or BP 1.8L engine. It fits into the OEM ECU enclosure and connects directly to the factory wiring loom — no modification required for supported vehicles.
This ECU supports most factory functions and is designed for manual transmission vehicles only. It includes an onboard 4 bar or 7 bar MAP sensor, but knock control is not available on this unit. E-Throttle support requires a hardware modification.
Note: This ECU is compatible with 2-plug ECUs only. It does not fit NB, NC, or ND models, and is not suitable for later 3-plug systems.
🚗 Vehicle Compatibility:
- Mazda MX-5 NA 1600 (1989–1997)
- Mazda MX-5 NA 1800 (1989–1997)
- Mazda 323 GTX (BP 1.8L)
- Mazda 323 GTR (BP 1.8L)
- Manual transmission only
🔧 Key G4X Plug-In Features:
- Plug-in installation with no loom modification
- Up to 6D fuel and ignition mapping
- Closed-loop cam control (up to four cams, independent control)
- Sequential fuel delivery
- Digital triggering, all OEM patterns
- OEM idle hardware supported
- 5D boost control with three switchable tables
- Motorsport features: launch control, antilag, and flat shift
- Continuous onboard barometric correction
- CAN port
- QuickTune – automated fuel tuning
- Individual cylinder correction
- USB tuning cable included
- Gear compensations for spark, boost, and fuel
- Dual maps for fuel, ignition, and boost – real-time selectable
- Compatible with Hall, VR, or optical sensors
- Boost control by gear, speed, or throttle
- 512MB onboard data logging
- Staged injection
- Knock control not available
📈 I/O Expansion Options:
Expansion Connector 1:
- Sensor Ground – SGnd
- +5V Supply – Low Current
- DI 6, DI 7 – Digital Inputs
- Volt 5, Volt 6 – Analog 0–5V Inputs
- Temp 3, Temp 4 – Temperature Inputs
Expansion Connector 2:
- Sensor Ground – SGnd
- +5V Supply – Low Current
- Ign 7, Ign 8 – Auxiliary Outputs
- DI 8, DI 9 – Digital Inputs
- Volt 9, Volt 10 – Analog 0–5V Inputs
Please refer to the PCLink Help File for installation instructions and base maps.
📁 Downloads and Resources:
