Honda Accord Adaptive Cruise Distance Sensor Radar (36801-TVA-A17)
Updated June 21, 2026
This forward-facing radar module is the primary sensor for the Adaptive Cruise Control (ACC) system on 2018-2022 Honda Accord models (including Hybrid). It continuously measures the distance and relative speed of vehicles ahead, allowing the ACC to automatically adjust your cruising speed and maintain a set following gap. The sensor is mounted behind the front bumper or grille and is identified by Honda part number 36801-TVA-A17.
AI-generated content
How It Works
The radar emits millimeter-wave radio signals that bounce off objects in front of the vehicle. By analyzing the reflected signals, the sensor calculates the distance and closing rate to the vehicle ahead. This data is fed to the ACC control module, which modulates throttle and brakes to maintain the driver-selected speed and following distance. The same sensor also supports the Collision Mitigation Braking System (CMBS) by triggering warnings and automatic braking when a potential collision is detected. The sensor requires precise horizontal and vertical alignment to function correctly.
Vehicle Compatibility
This radar sensor (36801-TVA-A17) is designed for the 2018-2022 Honda Accord, including both gasoline and Hybrid powertrains. It fits all trims equipped with factory Adaptive Cruise Control. Note that 2023-2025 Accord models use a different sensor (part number 8S301-30A-A04) and are not interchangeable. Always verify your vehicle's trim and existing ACC system before replacement. The sensor is also used on some related Honda models, but the Accord application is the most common.
Failure Symptoms & Diagnosis
Common signs of a failing or damaged radar sensor include a dashboard warning message such as 'Adaptive Cruise Control Problem' or 'ACC Unavailable', the ACC system failing to engage or dropping out intermittently, and the Collision Mitigation system becoming inoperative. Physical damage to the sensor housing or mounting bracket, misalignment from a minor front-end impact, or internal electronic failure are typical causes. A professional scan tool can retrieve diagnostic trouble codes (DTCs) related to radar performance, such as 'Radar Sensor Misaligned' or 'Radar Sensor Communication Error'.
Installation & Calibration Notes
Replacement involves removing the front bumper cover or grille to access the sensor, which is bolted to a bracket. Disconnect the electrical connector, remove the old sensor, and install the replacement using the same mounting hardware. After installation, the sensor must be calibrated using a compatible scan tool with Honda-specific software. This procedure aligns the radar's beam to the vehicle's forward axis. Some used sensors may also require VIN-specific programming to match the vehicle's systems. Professional installation is strongly recommended to ensure proper function and safety.
