I replaced my car with a new smaller vehicle but with exactly the same engine specifications. I tried to do it using the online self-service page but it froze a couple of times and then required me to telephone them. The agent I spoke to was very pleasant, efficient and helpful. However, at the end of the process of changing the vehicle I was asked to pay a £25.00 fee for making changes and £22.35 for who knows what as it was almost the same vehicle with regard to the specifications. I previously had to do the same process while insured with General Accident. I did it online with absolutely no problems and it did not incur fees or additional costs. I will NEVER use the RAC services again!