Haltech Nexus S2 ECUs with Plug-and-Play Harness

Not Yet Reviewed

The Nexus S2 ECU is the successor to the acclaimed Elite 1500, offering a serious upgrade in performance and functionality. With advanced features, user-friendly in

The Nexus S2 ECU is the successor to the acclaimed Elite 1500, offering a serious upgrade in performance and functionality. With advanced features, user-friendly interface, and seamless connectivity, the S2 redefines the standard for engine management systems in the automotive industry. Haltech offers several ways to connect your S2 ECU.

If you are using a factory harness and are after an easy ECU upgrade, Haltech Nexus S2 ECUs with a plug-and-play adapter harness are excellent choices. They plug directly into the ECU and have a set of factory connectors on the other side which plug straight into the factory harness, allowing you to be up and running in just a few hours. The included quick-start guide will walk you through installation of the adapter harness into your vehicle. Select the Haltech S2 ECU and harness kit designed for your vehicle.

Kits include:

* Nexus S2 ECU
* Injection molded plastic plug-and-play adaptor harness
* M14 x 1.5 air temp sensor with matching plug and pins
* Auxiliary I/O 16-pin Tyco plug and pins

All the results found for this search are Not In Stock.

Results 1 - 14 of 14

Haltech Nexus S2 ECUs with Plug-and-Play Harness for 1993-1995 RX-7 - HT-212307

Engine Management Systems, Nexus S2, ECU with Plug'n'Play Harness, Mazda RX-7, FD S6, Kit

Part Number: HTH-HT-212307

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026 if ordered today

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Estimated Ship Date: Jan 30, 2026 if ordered today

Haltech Nexus S2 ECUs with Plug-and-Play Harness for 1989-1994 240SX - HT-212315

Engine Management Systems, Nexus S2, ECU with Plug'n'Play Harness, for Nissan, S13, Kit

Part Number: HTH-HT-212315

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

Haltech Nexus S2 ECUs with Plug-and-Play Harness for 2002-2005 CIVIC, 2002-2004 RSX - HT-212302

Engine Management Systems, Nexus S2, ECU with Plug'n'Play Harness, for use on Honda® EP3, Kit

Part Number: HTH-HT-212302

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026 if ordered today

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Estimated Ship Date: Jan 30, 2026 if ordered today

Haltech Nexus S2 ECUs with Plug-and-Play Harness HT-212305

Engine Management Systems, Nexus S2, ECU with Plug'n'Play Harness, Subaru WRX, Kit

Part Number: HTH-HT-212305

Not Yet Reviewed

Estimated Ship Date: Jan 13, 2026 if ordered today

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Estimated Ship Date: Jan 13, 2026 if ordered today

Haltech Nexus S2 ECUs with Plug-and-Play Harness HT-212317

Engine Management Systems, Nexus S2, ECU with Plug'n'Play Harness, for Nissan, S15, Kit

Part Number: HTH-HT-212317

Not Yet Reviewed

Estimated Ship Date: Jan 13, 2026 if ordered today

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Estimated Ship Date: Jan 13, 2026 if ordered today

Haltech Nexus S2 ECUs with Plug-and-Play Harness for 1994-1998 240SX - HT-212304

Engine Management Systems, Nexus S2, ECU with Plug'n'Play Harness, for Nissan, S14, Kit

Part Number: HTH-HT-212304

Not Yet Reviewed

Estimated Ship Date: Jan 13, 2026 if ordered today

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Estimated Ship Date: Jan 13, 2026 if ordered today

Haltech Nexus S2 ECUs with Plug-and-Play Harness for 1979-1995 RX-7 - HT-212306

Engine Management Systems, Nexus S2, ECU with Plug'n'Play Harness, Mazda RX-7, FD S7/8, Kit

Part Number: HTH-HT-212306

Not Yet Reviewed

Estimated Ship Date: Jan 13, 2026 if ordered today

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Estimated Ship Date: Jan 13, 2026 if ordered today