Two problems related to steering is tight have been reported for the 2006 Acura TSX. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Acura TSX based on all problems reported for the 2006 TSX.
The morning of Thursday June 30th 2016 I tuned the car on and had an odd sound that even when I turned or drove it sounded like a bus! the steering was hard yet I still managed to get to work and home safely. My husband said the power steering fluid was depleted and added fluid. I then took it to work and was running ok no more sounds and I was content. That afternoon though I started up again and then saw the trail of fluid running down from under the car. The noise and stiffness of the steering wheel was back. Needless to say I almost couldn't make a turn to get into my home.
Power steering rack failed unexpectedly. Car developed a noise without any warning, and the steering became hard to turn. Made it to the repair center (dealership) without any problems, but the steering wheel was really hard to turn by the time I got there (with a drive no longer than 10 miles). Looking at online forums, it appears that an abnormal number of people have needed power steering racks between 90k-130k miles due to leaks. This appears abnormal, as my understanding is that a rack should last for the life of the car. This makes me wonder if it has anything to do with the power steering leak TSB that Acura has for these cars.