The time limit for making a claim for vehicle loss / repairs
( special damages ) is six years .
3 Years is an unsually long period for the claim not to have been sorted .
Have the insurers of the other party accepted liability or is that still an issue?
If it is not settled before the six years is up , then proceedings will need to be issued to protect against Limitation .
For injury ( General damages ) 3 years .
If your friend intends making a claim for injury and other losses associated with an injury ; then In order to protect against Limitation - your friend needs to make his/her claim against the other party/insurer and issue proceedings before the three years is up .