Honda K20A Vehicle Speed Sensor 78410-S6M-N01

Honda K20A Vehicle Speed Sensor 78410-S6M-N01

Restore factory-accurate road-speed data and keep your K-Series ECU happy with this genuine Honda K20A Vehicle Speed Sensor 78410-S6M-N01. Mounted on the rear of the transmission, it sends precise VSS signals to your speedometer, ABS, ECU, and cruise-control systems—crucial for stock drivetrains and K-swap conversions alike.

Why you’ll want this OEM sensor

• Factory quality, zero guesswork – brand-new Honda part #78410-S6M-N01 for perfect reliability and fit.
• Plug-and-play compatibility – direct replacement for 2002-2004 Acura RSX Type-S and 2004-2005 Honda Civic Si, plus any K-swap using a K20A2-style harness (Hybrid Racing Conversion Harness & Rywire Engine Harness).
• Sealed for life – molded connector, weather-pack terminals and pre-installed O-ring keep dirt and fluid out on street or track.
• Accurate data every time – eliminates erratic speedometer readings that can trigger limp mode, disable VTEC engagement or throw check-engine lights.
• Must-have for swaps – allows older chassis (EG, EK, DC2, EF) to communicate cleanly with K-Series ECUs when paired with your preferred conversion harness.

Whether you’re refreshing a high-mileage RSX, finishing a weekend K-swap, or chasing the last glitch before a dyno tune, this Honda K20A Vehicle Speed Sensor 78410-S6M-N01 is the small part that makes a big difference in drivability and data logging.

Installation Snapshot

DIY skill level—basic; 15–30 min; pre-installed O-ring, OEM retaining bolt reused; no tuning or cutting required.