12 Valve VR6 Engine Code AAA (Standard Length)

Sesh Motorsports

Sale price $449.00 Regular price $694.00
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12 Valve VR6 Engine Code AAA (Standard Length)
12 Valve VR6 Engine Code AAA (Standard Length)
12 Valve VR6 Engine Code AAA (Standard Length)
12 Valve VR6 Engine Code AAA (Standard Length)
12 Valve VR6 Engine Code AAA (Standard Length)
12 Valve VR6 Engine Code AAA (Standard Length)

Our harnesses are standalone harnesses.  Dont be alarmed this makes your life easier. No fuse box needed. Fuse holders, and relays are built in! 
This means you can use them in any chassis!  You can install VW motors in virtually any car: Honda, Toyota, Lawn Mowers, Ferrari, Rabbit, Scirocco & MORE!
Fabrication of course is always required for the engine mounts but we've made the wiring that simple! This harness requires use of your factory ECU (computer). This isn't a "Standalone ECU" wiring harness. 

No more cores needed! 


- Harnesses are built with mass air flow sensor and rear knock leads extended to engine end of harness. Unlike OEM harnesses, they locate the mass air flow and knock sensor at the ECU end of the harness. This makes the harness much easier to route and/or tuck when installing. 

Harnesses contain an ECU controlled fuel pump relay for OEM function and safety.

- Battery leads are fused in the event of a component malfunction.

The harness has five simple leads to get your engine running:

1. Power
2. Ground
3. Fuel pump positive+ lead
4. 12 volt switched “on” trigger
5. Starter switch lead

- OBD2 AAA VR6 Motors Only
- OEM Connectors
- OBD Diagnostic Connector Built In


- Tach adapter drop down menu is a simple way to add a RPM signal converter to your factory cluster. If you are swapping a VR6 into a chassis that originally had a 4 cylinder. This tach adapter is needed. We've simplified the install by incorporating the plug into the Sesh built harness.

All harnesses hand built and individually tested on an engine to check for functionality and errors.

We stock these harnesses so there’s no wait needed and NO core charge.

We bench test all harnesses at our facility to ensure proper operation before shipping. If your engine or hardware has issues prior to installing our harness or you haven't verified the engine runs properly please keep in mind it can be difficult for us to diagnose your prior mechanical issues (timing, cam, crank sensor, ignition system etc.)

Guys looking to swap using a 1990+ OEM VW (  CE2 ) you can add a direct plug-in CE2 fuse box harness lead to your Sesh harness.  This allows for plugging the Sesh Harness directly into the CE2 Fuse Box.


To determine if you have a CE2 fuse box it will look like this. 

CE2 Fuse boxes are most commonly found on:

1990+ VW chassis

All MK3 VW Golf / Jetta / Cabriolet chassis 






Before using harness ensure motor has a quality ground and that starter operation is good. If a bad engine ground is present the harness will act as a ground and MELT the chassis/engine ground circuit in the harness. Before putting any of the harness in simply "crank" the engine and make sure it cranks "normal".

When hooking both harness battery leads up be sure to fuse the leads AT the BATTERY with 30 amp fuses for safety of harness and car in case of chaffing or shorts.

*** Note: these are condensed down harnesses, utilizing only components needed to run the engine intended for OFF ROAD use ONLY ***

 NOTE: Tach adapter is needed for operating earlier style cluster tachometers as in mk1/mk2 and similar vintage chassis, or when needing to operate a tachometer not originally calibrated for a 6 cylinder engine.