Thank you for this useful advice, I appreciate it.

The BGPA Unit is a unit that regulates the electronic circuits in the car. I have been through the whole claims trajectory with the AA and to no avail. I've tried the Financial Conduct Authority but they don't fall under that. That's why I'm seeking advice from people that might have gone through the same issue.

The AA damaged BGPA unit in my car due to non-correct battery replacement procedure At the end of September last year I got stranded at home because of a dead car battery in my Citroen C4. I phoned the AA, of which I am a member since 2017, and they sent a mechanic to assess the situation. Following his assessment my car battery was replaced by him the same day. Following the battery replacement, I started experiencing problems with my car. The car's dashboard computer screen started - randomly - to display fault messages regarding the electrical circuit and/or the battery. The AA mechanic had suggested this could have happened because the car needed to 'reset' itself, but unfortunately with time the frequency of the messages increased. I therefore decided to have it checked at an authorised Citroen garage and was given an appointment at the end of January. The diagnostics report, issued by this independent garage, stated that as a result of not following the correct procedures when the car battery was changed, the BPGA Unit had been damaged and needed replacing. The car’s computer fault messages I had been getting were a direct result of the damaged BGPA unit. The unit has since been replaced at a total cost of £695. Because the Citroen garage had unequivocally concluded that the BGPA Unit could have not been damaged by anything other than an incorrect battery replacement procedure, I decided to file a claim with the AA for the sustained costs. After a few weeks of email correspondence, they informed me that they will not refund me as it is their belief that their mechanic has done nothing wrong. During the email correspondence, I had asked them more than once to contact the person at the garage so they could verify my claim (this gentleman at the garage had kindly offered to have his contact details forwarded to the AA for that reason as the garage sees cars being brought in with the same problem on a very regular basis, all due to incorrect battery replacement), but to no avail. By not contacting the garage and only bringing forward their side of the story, I feel the AA has not conducted a fair nor independent evaluation of the matter. I sought advice with the Financial Ombudsman, but it turns out the AA's Breakdown Service is exempt from authorisation under the Financial Services and Markets Act. Has anyone else experienced something similar? According to my garage, they get cases like this in on a weekly basis so there must be others out there. How have you handled it? Any luck? Thanks in advance for advice/replies.