Rear Parking Sensors, Front Parking Sensor, Parking Aid, Reverse Sensor. We offer professional installation Service on Parking Sensors. Prices for Rear Sensors is £129.99 and Front Parking Sensor is £175 Supplied and Fit at our workshop in Leyton. Having problem Parking or Reversing in tight gaps or small spaces. Our range of Parking aid will make parking easier and safer. The sensors are mounted at the rear of the vehicle or the front and gives audible sounds or visible warning as you drive closer.