Benefast Accelerator Pedal Position (APP) Sensor Assembly for Honda & Acura — Direct Fit, OE Replaces 37971-RBB-003

If your vehicle is showing throttle hesitation, unexpected engine warning lights, or inconsistent acceleration, a worn or failed Accelerator Pedal Position (APP) sensor can be the cause. This Benefast replacement assembly is engineered to match the electrical and mechanical fit of the original unit used across many Honda and Acura models, offering a direct-swap solution to bring pedal signals back to the engine control unit (ECU).

How does the APP sensor affect everyday driving?

The APP sensor translates how far you press the gas pedal into an electrical signal the ECU uses to manage throttle, fuel delivery, and engine response. When the sensor sends inaccurate readings, you can notice delayed or uneven acceleration and may trigger diagnostic trouble codes. Replacing the sensor restores consistent communication between the pedal and the powertrain control systems.

• Restores accurate pedal-to-ECU signal translation for smooth acceleration.
• Resolves symptoms like hesitation, surging, or limp-home mode when faulty.
• Helps extinguish throttle-related warning lights if the sensor was the cause.

Which vehicles and OE numbers does this Benefast unit fit?

This APP sensor assembly was designed to fit a broad range of Honda and Acura models from the early 2000s through the early 2010s. Matching the OE or replacement numbers is the best way to confirm fitment before installation.

• Fits: 2003–2007 Honda Accord; 2003–2006 Acura MDX; 2004–2008 Acura TL and TSX.
• Also fits: 2005–2006 CR-V, 2007–2011 Element, 2005–2008 Pilot, 2006–2014 Ridgeline.
• OE / reference numbers: 37971-RBB-003, 37971-PZX-003, 37971-RCA-A01, 37971-RDA-A01.

What causes APP sensor failures and what should I watch for?

APP sensors are positioned near the firewall and floorboard, exposing them to heat, road debris, and long-term wear. Damage, corrosion, or internal electrical drift can lead to inaccurate pedal position signals or complete failure. Early detection reduces downtime and prevents further diagnostic confusion.

• Common causes: prolonged heat exposure, moisture intrusion, and mechanical wear.
• Warning signs: throttle hesitation, inconsistent engine response, or a check engine light with throttle-related codes.
• When observed: inspect wiring and connectors; if fault persists, replace the sensor assembly.

How straightforward is installation and what should a DIYer expect?

Installation is usually a straightforward bolt-and-plug replacement with no ECU reprogramming required in most cases. Basic hand tools, modest mechanical experience, and proper safety practices are enough for a competent DIYer, but if you’re unsure, a certified technician can confirm fit and finalize installation.

• Direct-swap design fits the original mounting points and wiring harness plug.
• No special calibration typically required; follow vehicle service manual torque specs.
• If a code remains after installation, clear codes and test drive; consult a shop if issues persist.

Who is this for: Benefast’s 699-199 APP Sensor Assembly is intended for owners, independent mechanics, and fleet technicians who need a reliable, OE-referenced replacement for Honda and Acura vehicles affected by throttle response problems. Choose this sensor if you need a plug-and-play replacement that matches common OEM part numbers and restores accurate pedal input to the ECU without complex programming.