cx500bri

Hi just bought a 2011 Grand voyager after a five absence with a Toyota Estima. Had 3 grand voyager in the past and its nice to have a relatively up to date one. One moan my wife has are no front parking sensors. Has any body fitted front sensors and which ones have you used. There are a lot in ebay at about 25 quid and this just seems too cheap.....or is that what t=you pay. Brian