Autronic SM4 Motorsport Wiring Loom

Autronic SM4 Motorsport Wiring Loom

Motorsport-grade ETFE (MIL-W-22759/16) wiring loom engineered specifically for the Autronic SM4 Engine Control Unit.

This wiring loom is designed for builders who require a reliable, professional-grade electrical foundation for an Autronic SM4–controlled engine. Hand-built using MIL-W-22759/16 motorsport-grade ETFE wire, it is intended for motorsport and high-performance applications where heat, vibration, electrical noise, and increased system complexity are part of the operating environment.

The Autronic SM4 is a well-established ECU used in serious motorsport and high-performance builds, and this loom removes the compromises commonly found in universal or automotive-grade wiring.

Designed Specifically for Autronic SM4

This loom is pinned exclusively for the Autronic SM4 ECU. Every circuit is allocated correctly for the ECU’s expanded engine management inputs, outputs, power supply, and communications — with no universal pinouts, repurposed circuits, or guesswork.

The result is a clean, predictable wiring system that supports accurate sensor data, stable ECU operation, and long-term reliability in demanding performance and race environments.

Built Using Motorsport-Grade ETFE Wire (MIL-W-22759/16)

MIL-W-22759/16 ETFE wire was originally developed for aerospace and military applications and is ideally suited to harsh motorsport environments.

Key benefits include:

• Excellent resistance to heat, fuels, oils, and automotive chemicals

• Thin, lightweight insulation for compact, higher-density looms

• High durability under vibration and continual movement

• Reduced risk of insulation degradation over time

This wire is selected for reliability — not cost.

Terminated or Unterminated Options

This Autronic SM4 loom is supplied in an unterminated (flying lead) configuration as standard, allowing complete flexibility for engine layout, sensor selection, and routing.

A pin placement sheet showing wire numbers is available to download to assist with installation.

Custom terminations, wire lengths, and additional provisions can be discussed prior to ordering if required.

Suitable Applications

This loom is suitable for:

• Motorsport and competition vehicles

• Circuit racing, time attack, and drag racing

• High-performance street and track builds

• Engine swaps and custom conversions

• Professional workshops and performance fabricators

This is not a vehicle-specific plug-and-play harness. It is intended for custom installations where control, reliability, and electrical integrity matter.

What’s Included

• Autronic SM4 ECU connector(s)

• Pre-wired ETFE (MIL-W-22759/16) wiring loom

• Built to order and quality checked prior to dispatch

Sensors, actuators, and the ECU are not included.

Lead Time

Each loom is hand-built to order. Typical lead time is displayed at checkout and may vary during busy periods.

If your build has a deadline, please contact us prior to ordering.

Built to Support Serious Motorsport Builds

The Autronic SM4 is a proven standalone ECU with a strong motorsport pedigree. This loom is designed to support it properly — without shortcuts, compromises, or unnecessary complexity — while maintaining modern motorsport wiring standards.

Select options above or contact us to discuss custom requirements.

Legal Notice

Autronic® is a registered trademark of Autronic Controls Pty Ltd. This product is not affiliated with or endorsed by Autronic.