Rear Sensor 1pcs (part numbers 234 4256 12609457) is a direct replacement sensor for the rear bumper. This single unit restores rear obstacle detection to support safer reversing. - Function: detects obstacles behind the vehicle and provides a warning to help prevent bumps and scrapes. - Benefits: restores parking assist capability, reduces the risk of minor collisions, and extends the life of your bumper sensors. - Compatibility: designed as a direct replacement for select models. Confirm fitment by checking the part numbers and your vehicle’s bumper specifications. - Size and material: standard rear-sensor footprint with a durable plastic housing. Exact dimensions and materials vary by vehicle; refer to the product spec sheet for your model. - Performance: engineered for reliable sensing under typical operating conditions and compatible with common electrical systems found in modern vehicles. - What’s included: 1 x rear sensor. Use scenarios: - Parking in tight garages or crowded lots where precise distance cues are needed. - Reversing with a trailer or hitch to avoid low obstacles behind the vehicle. - Replacing a damaged or failed sensor after a bumper impact to restore full parking assist functionality.