• Haltech HT-231001 Nexus Plug-in ECU for Honda EP3 and Integra DC5 - front angle view
  • Haltech HT-231001 Nexus Plug-in ECU connector pins - factory plug-in fitment
  • Haltech HT-231001 Nexus Plug-in ECU showing USB-C port and auxiliary connector
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Haltech HT-231011 Nexus Plug-In ECU – Honda Integra / Acura RSX DC5 (05-06)

Haltech HT-231011 Nexus Plug-In ECU – Honda Integra / Acura RSX DC5 (05-06)

HT-231011

$2,350.00 AUD
$2,350.00 AUD
Sale Sold out
Tax included. Shipping calculated at checkout.
  • Authorised Haltech dealer
  • Fast Shipping Australia Wide
  • Real fitment advice

Haltech HT-231011 Nexus Plug-In ECU for Honda Integra / Acura RSX DC5 (05-06)

The Haltech HT-231011 Nexus Plug-In ECU plugs directly into your factory DC5 Integra/RSX (05-06) wiring harness and sits neatly in the factory ECU location — no rewiring required. It fully supports vital OEM functions while unlocking modern standalone engine management, wireless Wi-Fi tuning via the Haltech Connect App, and serious race-focused functionality.

Vehicle Compatibility

  • Honda Integra / Acura RSX DC5 (2005–2006)

Supports manual transmissions only – factory 5 or 6 speed manual.

Key Features

  • Drive By Wire throttle support
  • Single channel onboard wideband control (supports LSU4.9/NTK)
  • Built-in Wi-Fi for wireless tuning and diagnostics
  • 4-channel onboard oscilloscope
  • 128MB onboard data logging
  • Flex Fuel compatible
  • Closed loop O2 control
  • Knock control
  • Long term fuel and ignition learning

OEM Plus & Race Functionality (via Auxiliary Connector)

  • O2 control, Flex Fuel, oil pressure and fuel pressure sensing
  • CO2 boost control
  • Race timer
  • Advanced torque management
  • Launch control
  • Nitrous control
  • 2 x half bridge outputs, 4 x digital pulsed outputs, 4 x synchronised pulsed inputs
  • 1 x onboard wideband, 2 x sensor ground, 2 x 12V output, 2 x 5V output

What's Included

  • Nexus Plug-In ECU
  • Air temperature + wideband expansion harness, 2.5m (8')
  • Air temperature sensor (1/8" NPT)
  • Aluminium bung for air temperature sensor
  • Mounting brackets and hardware
  • 2.5m vacuum hose and T-piece
  • Haltech USB-C cable
  • Quick start guide

Supported OEM Functionality

  • VTEC solenoid
  • VTC solenoid
  • IMRC (dual intake runner system)
  • Serial communication with the Multiplex Control Unit
  • Coolant temperature display (dash)
  • Battery warning light (dash)
  • A/C request signal (climate control)
  • Serial communication with the immobiliser

Why Upgrade to the Nexus Plug-In ECU?

Rather than stripping out your factory harness, the Nexus Plug-In ECU drops straight into the OEM connector and location on your DC5, giving you a clean, reliable install with the tuning depth of a full standalone ECU. It's a genuine step up from the ageing factory Honda ECU for street, track, and drift-focused K-series and Honda builds.

Frequently Asked Questions

Is this the same as the HT-231001?
No – the HT-231011 is specific to the 2005-2006 DC5 Integra/RSX, which uses a different factory ECU connector to the 2002-2004 model covered by the HT-231001.

Does it support automatic transmissions?
No, this ECU supports manual transmissions only (factory 5 or 6 speed).

Can I tune it without a laptop?
Yes – it connects via Wi-Fi to the Haltech Connect App for setup, tuning, and live monitoring from a smartphone, as well as NSP software.

When will this be available?
This is a pre-sale item, expected to ship mid-July 2026.

View full details
  • Haltech HT-231001 Nexus Plug-in ECU for Honda EP3 and Integra DC5 - front angle view
  • Haltech HT-231001 Nexus Plug-in ECU connector pins - factory plug-in fitment
  • Haltech HT-231001 Nexus Plug-in ECU showing USB-C port and auxiliary connector

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?