Oga,
Different companies use different ways of underwriting car insurance quotes which means that you will see different quotes as different insurers have different ways of assessing the risks associated with a car insurance application. You will notice that when filling the application form for a car insurance quote, you will be asked if you had any accidents within the last 5 years whether it is your fault or not. Some insurers will still use a non-fault accident as a negative sign and consequently quote you higher. This should not be the case if the accident was not your fault but the problem is that most insurers want people with a good driving record, that is, an unblemished history. The moment you have something worth mentioning on your car insurance application form, you need to expect higher premiums unfortunately.