• Haltech Nexus S3 ECU + Universal Wire-in Harness - 2.5m (8')
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Haltech Nexus S3 ECU + Universal Wire-in Harness - 2.5m (8')

Haltech Nexus S3 ECU + Universal Wire-in Harness - 2.5m (8')

HT-213200

$3,605.00 AUD
$3,605.00 AUD
Sale Sold out
Tax included. Shipping calculated at checkout.
  • Authorised Haltech dealer
  • Fast Shipping Australia Wide
  • Real fitment advice

Nexus S3 ECU + Universal Wire-in Harness - 2.5m (8')
Haltech's Nexus S3 is the successor to the acclaimed Elite 2500, offering a serious upgrade in performance and functionality. The S3 combines all the classic functionality of the Elite 2500 with new features and the superior processing power of the successful Nexus platform.

Harness: Ideal for modified street cars, engine swaps and custom wiring jobs. The Universal Wire-in Harness has a set of ECU connectors at one end and unterminated wires at the other, all colour coded and clearly labelled to match the detailed wiring diagram for a confusion-free installation. Connect your Haltech ECU, follow the wiring diagram for all engine connections, load your base map and you're ready to go.

Includes: Nexus S3 ECU, 2.5m (8') Universal Wire-in Harness with colour-coded, labelled wiring, quick start guide. Full manual and NSP software available for download from the Haltech website.

Key ECU features:

  • 8 x peak/hold injector drivers (can be used as low side drive outputs)
  • 8 x low current ignition outputs (can be used as low side drive outputs)
  • 6 x low side drive outputs, PWM capable (DPOs)
  • 4 x push-pull / half bridge outputs (8A, PWM capable), e.g. for electronic throttle
  • 1 x ECR output
  • 11 x 0-5V analog inputs with redundancy for electronic throttle and switchable 5V pullup
  • Trigger and home inputs with differential inputs, adjustable thresholds and glitch filters
  • 6 x synchronous pulsed inputs, zero crossing or adjustable thresholds - cam sensor, frequency or 0-5V analog inputs
  • 1 x on-board wideband controller, supporting NTK and LSU4.9
  • 1 x on-board 4 bar MAP sensor
  • 2 x CAN ports with switchable termination
  • Onboard data logging: up to 300 channels at sample rates up to 1ms (1kHz) with 128MB of internal memory
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  • Haltech Nexus S3 ECU + Universal Wire-in Harness - 2.5m (8')

Haltech buying information

Warranty & authorised dealer

Racing Solutions is an authorised Australian Haltech dealer. Everything we supply is genuine, current-revision Haltech stock — never grey or parallel import.

Haltech products come with a limited 12-month warranty covering defects in materials and workmanship from the date of purchase.

Warranty claims are handled directly by Haltech. You'll need valid proof of purchase — your original invoice or receipt. If you're not sure where to start, get in touch and we'll point you in the right direction.

Price match

If you find this exact item advertised for less by another authorised Australian Haltech dealer, contact us before you order and we'll match the price.

To qualify:

  • The competitor must be an authorised Australian Haltech dealer
  • Same part number, brand new, and currently in stock with them
  • The price must be publicly advertised and GST-inclusive
  • We compare the total delivered price, including shipping
  • Excludes clearance, run-out, sale events, member-only pricing, and auction or marketplace listings

Call 0458 998 395 or use the contact form below and we'll confirm within one business day.

Dispatch & delivery

If the item is in stock at our Perth warehouse or at Haltech, it ships same or next business day.

Not every product is held in stock, including at Haltech. Items that need to be built or restocked can take up to 4 weeks.

If you want a firm lead time before you order, get in touch and we'll confirm it for you.

Tuning & fitment support

Buying the ECU is the start, not the end. We can talk you through which harness, sensors and accessories your combination actually needs, and point you toward tuners who know the platform.

Over 20 years of hands-on trade experience sits behind that advice — we build and run these cars ourselves.

Not sure which ECU or harness you need?

Haltech's range spans wire-in ECUs, plug-in ECUs, terminated harnesses and plug-and-play kits. The right choice depends on your engine, throttle type (cable or drive-by-wire) and injector connectors.

Send us your engine, model year and current setup and we'll confirm the correct part number before you buy.

Questions about this Haltech product?