http://www.theaa.com/breakdownrepaircover/index.html has the details
Save on expensive replacement parts
These are average claim costs for replacing these parts, based on our customers' experiences last year.
If we attended your breakdown and you needed one of these parts in a subsequent repair, you would pay only the £25 excess.
batteries can normally cost over £70 – more than the BRC annual premium
radiator replacement – £264
cam belt failure – £129
alternators – £272
head gaskets – £386
Find out more about the common causes of breakdown.
Our claims service
If our patrol can't complete repairs at the roadside, we'll arrange for a garage to carry out the repair work. Our claims team can talk to the garage on your behalf, so you don't have to get involved with the technical details. And we'll even arrange to pay the breakdown repair bill directly with the garage.
Important
For a claim to be considered you must call the AA for breakdown assistance.
Once you've nominated a vehicle for Breakdown Repair Cover, you'll need to keep it serviced in line with the manufacturer's recommendations. Servicing must be done by a suitable garage business.
A claim on your Breakdown Repair Cover cannot be for any faults that occur during the first 14 days of cover. If you change your vehicle you will also not be able to claim for 14 days after making the change.
Terms and conditions (eg small print) is here:
http://www.theaa.com/breakdownrepaircover/terms-conditions.html