Is my lemon law settlement on my car taxable?

I'm wondering whether any part of the settlement I receive on my car that is being handled sort of as lemon law by the manufacturer.

 

I get to keep the car.

 

$30,000 My purchase price (I bought it used)

$20,000 Current value - IF it was in good condition

$15,000 Approximate current value because there are lots of problems

$10,000 settlement offered by manufacturer (and I get to keep the car)

 

I deduct 50% as business use of the car on my tax return

 

1) If it is taxable, how much would be taxable?

 

2) And would I pay tax this year, or would I wait until I sell the car to see what it sells for at that time?