A ten year old car?

1. I developed an emotional attachment to my car that I drove for 10 years?
2. I developed an emotional attachment to my ten year old car.
3. I developed an emotional attachment to a ten year old car.

Q) Regardless of the same meaning, does 2&3 sound OK?

The sentences 2 & 3 are grammatically correct. hyphen is required (ten-year-old)
In sentence 3 it is 'the car' a

1. I developed an emotional attachment to the car that I drove for 10 years? ...my car, which I drove...

2. I developed an emotional attachment to my ten-year-old car.
3. I developed an emotional attachment to a ten-year-old car.

#3: It sounds odd that one would become attached to just any old car.

Thank you Mister Micawber.
I would like know whether the correction I have made in the tense is not necessary or incorrect.

A. I developed an emotional attachment to the car that I drove for 10 years.
B. I developed an emotional attachment to the car that I had driven for 10 years.

I don't see any real difference in meaning or intent with those two, since there is little room for ambiguity, but if you use my alternative:

C. I developed an emotional attachment to my car, which I d

Your explanation is just as always, very clear. Thank you, Mister Micawber.