Hi markh and welcome to the forum
How long have you been in your IVA? What provision was made for car maintenance in the original proposal, and did you feel that your car at the time would last the full five years of the IVA? These are things that must be given due consideration to from the outset, and are sadly overlooked a lot of the time.
Have you tried looking at finance options - or perhaps a family member could help out maybe taking out the finance in their own names and you could reimburese them? You can get some very good second hand deals at motor traders these days.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk