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Wiring Specialties S13 SR20DET Pre-Made Swap Harness for Nissan 240sx S13

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This Wiring Specialties Pre-Made Harness combo includes both the engine and transmission harnesses for the S13 SR20DET installed in an S13 240sx. Replace both harnesses with brand new ones and save time and money!

This is a plug and play harness with no additional wiring needed and a guaranteed start up.

The SR20DET wiring harness combo supports the following:

  • Any Redtop from a 1990-1993.5 Silvia or 180sx
  • Any Blacktop from a 1994-1996 180sx
  • ECU—62, 63, E5, E4
  • For the ECU J4 (Type-X III): Select J4 and we’ll prep the harness prior to shipping.
  • Any S13 240sx manufactured in 1989-1994, including the Convertible and ABS cars.

Engine and Transmission Harness Features:

  • New wiring and connectors.
  • Installs in 15 minutes.
  • The swap harness replaces the OEM engine harness entirely.
  • Includes ABS wiring for any S13 240sx.
  • Supports the OEM Consult port (DOHC models and up).
  • Improved ECU grounding.
  • OEM connector specs, no subpar aftermarket connectors.
  • Designed for a fit and finish factory-like installation on the S13 240sx.
  • Retains OEM wiper functionality.
  • Retains Cruise Control and all gauge functions.
  • Works with the Greddy/Freddy intake manifolds.
  • All A/C, temporary override, and auto on/off controls function properly.
  • OEM wiring connections and 'T' junctions with no soldering required.
  • Fully tested after production for an easy plug-and-play replacement.
  • Supports both S13 and S14 Speed Sensors.
  • Transmission harness supports auto and 5-speed cars.

The SR20DET wiring harness combo is a high quality upgrade for the Nissan S13 240SX that will improve performance and functionality and make for an easy and clean install.

Order Now

Our experts are passionate about addressing your tuning requirements. All the parts we carry are designed for optimal performance, and we strive to provide the most outstanding customer service in the industry. If you have any questions about this particular wiring harness or performance upgrades in general, please contact us. Order your S13 wiring harness today!


  1. Hassle Free Harness

    Posted by Unknown on

    Most simple harness for the 240sx! Very easy to install! Definitely wouldn't mind buying something from them again!

  2. Amazing

    Posted by christopher glaser on

    Takes the headache out of cutting and splicing two older harnesses. With all new connectors there is no trouble with corrosion and cracked plugs. Turn key harness safe yourself some trouble and buy this

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