Honda Civic 2012-2015 Haltech Nexus Wiring Harness (BF29141)

The 9th-gen Civic R18A platform benefits significantly from standalone ECU calibration, and this harness makes it straightforward.

The Honda Civic R18A has more in it than the factory ECU allows, and proper standalone calibration is how you find it. The Boomslang PNP Wiring Harness for the Haltech Nexus connects directly to your factory harness without any permanent modifications, giving the Haltech Nexus full standalone engine control. No cutting, no splicing, fully reversible.

Advantages

• Throttle response that's immediate and direct, not filtered through Honda's conservative factory mapping
• VTEC engagement calibrated to your actual RPM targets, not factory compromise points
• Fuel and ignition timing built around your modifications
• Idle stability that's consistent and locked in at all temperatures
• A tune that reflects your build rather than working around it

Features

• Plug-and-play fitment for 2012-2015 Honda Civic R18A, manual transmission
• Compatible with Haltech Nexus R3, R5, S2, and S3 ECUs
• No cutting or splicing of factory wiring
• OEM-quality connectors, USA-built byBoomslang Fabrication
• Fully reversible, factory harness preserved
• For competition and off-road use

The Details

Built specifically for this vehicle's connector layout with OEM-spec connectors and correct wire gauge throughout. Your factory harness stays completely untouched and the car can return to stock at any time. The Haltech Nexus takes full engine control once installed, giving your tuner a clean vehicle-specific foundation to build a proper map from.

Kit Includes

• 1xBoomslang PNP wiring harness for 2012-2015 Honda Civic R18A
• Haltech Nexus ECU sold separately

Fitment

2012-2015 Honda Civic, Manual Transmission.