I have a 2012 Jazz vtec from new. It has had a squeak almost since I bought it. It has been back several times under warranty for the last 5 years but without success. It seems to start when the day is hot, low 20's and above. The passenger can hear it the most and my wife says it sounds as though it is coming from the rear door. I have driven it with everything in the back removed, including the rear wheel and jack. The rear seat foot locking and the tailgate latch have been changed, tape put around the rear seat and parcel shelf latches. I have sprayed silicone on the tailgate seals, and under the plastic coving, but to no avail. I have just checked the suspension cap cover screws as suggested in another query. I would welcome any further advice