You have a timing chain, and should not have to be replaced unless you have excessive slack on its slapping the timing cover because the tensioner has failed. This is very uncommon though as they should last the life of the vehicle.
Your 2005 Honda CR-V has a timing chain.
It does NOT need changing unless a problem develops,
and the good news is the CR-V's timing chain rarely develops any problems.
〉 Answered on Feb 25th, 2015 by Amy Mattinat, Owner and Author at Auto Craftsmen Ltd
Your CR-V has a timing chain, which is virtually maintenance free. If, over time, it stretches, you will get a "check engine" light on your dash, which will give the mechanic the appropriate code. At your mileage, you have quite a while before there might be any concern.
〉 Answered on Feb 25th, 2015 by Gail Dunn, Owner at Women's Automotive Connection