Honda is recalling more than 18,000 cars to fix problems with the brakes.
The recall affects more than 13,000 Acura RSX compact cars from 2006 and the Honda S2000 sports car from the 2006 and 2007 model years.
The company says some power brake booster parts weren't made correctly.
That could cause a decrease in braking power over time and could increase the risk of a crash.
So far, no injuries or accidents have been reported.
Owners will be notified by mail in mid-July.
Dealers will replace the brake booster if needed.