Mrs. Armitage, Queen of the Road by Quentin Blake, 2003.

When Mrs. Armitage‘s Uncle Cosmo decides to get a new motorcycle, he lets her have his old car.  However, it isn’t in very good condition.

Mrs. Armitage and Breakspear decide to try it out, but as they drive along, pieces of the car fall off.  Some of it is because the car is in bad repair, and some is due to accidents Mrs. Armitage has.  First, the hubcabs, then the fenders fall off.  Mrs. Armitage shrugs it off , saying, “Who needs them?”

Eventually, the car goes almost entirely to pieces, but who needs it all?

When Uncle Cosmo shows up with his friends and their motorcycles, they help her fix up what’s left of the car into one amazing machine!

The book is available to borrow and read for free online through Internet Archive (multiple copies, including one in Spanish).