One problem related to engine clicking and tapping noises has been reported for the 2006 Toyota Camry. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Toyota Camry based on all problems reported for the 2006 Camry.
Leaking head gasket-car began making intermittent clicking noise. Dealer checked and said nothing to worry about-probably loose fuel pump. They tightened that. Still noise. Took it back-"oops" it's a leaking head gasket they said had been defective since manufacture. Had I continued to drive I could have experienced complete engine failure at any speed.