Overview
Finding a replacement throttle position sensor for an RSX Type-S or EP3 Civic Si has always been a
headache. According to ACUITY, Acura and Honda only supply the OEM sensor as part of a complete
throttle body — a list price of more than $800 — and most aftermarket options have been
low-quality copies or adapted sensors from other applications.
ACUITY designed this TPS from scratch. Rather than copy the OEM wiper-style design, it uses a modern
Hall Effect sensor inside an injection-molded nylon composite housing, and it has been tested to over
2 million cycles. The different look from the OEM part is intentional: the contactless design is
smaller, lighter, and doesn't wear the way a resistive track does.
Why Hall Effect?
Before drive-by-wire, Honda measured throttle position with wiper-style variable resistors. Those
sensors — and the many re-branded copies of them — can wear out early and give unsteady readings
from engine vibration. A contactless Hall Effect sensor is highly resistant to vibration, and the
ACUITY unit's on-board signal processor produces a smooth, consistent voltage output. ACUITY reports
the result as better tip-in response, a steadier idle, and sharper throttle response — especially on
cars running stiffer-than-stock engine mounts.
- Sensing
- Contactless Hall Effect with on-board signal processor
- Housing
- Fiber-reinforced nylon composite
- Seal
- Integral o-ring (replaces paper gasket)
- Durability
- Tested to over 2 million cycles
Vehicle Fitment
| Years | Vehicle | Notes |
|---|
| 2002–2006 | Acura RSX Type-S | — |
| 2002–2005 | Honda Civic Si (EP3) | — |
| 2002–2006 | Honda Integra Type-R | JDM model |
Not compatible with the base model RSX throttle body or wiring harness. Not sure which you have? Include your year, model, and trim in your inquiry and we'll confirm before anything ships.
What's Included
- 1×Hall Effect TPS sensor
- 2×Yellow zinc M5 mounting screws
ACUITY® is a trademark of Acuity Instruments. Specifications and images are provided by the manufacturer. OEM price reference is the manufacturer's statement, not a Madsen Performance price.
