[2.2 Straight six]

engine mounts are usually made of rubber, and over time they rot and disintegrate. this is clearly visible though, and you'll see if they're cracked or not. belts have a lifespan or 15,000-30,000 miles, so check your service book for when they were last repared.

get the new rear bump stops fitted now, as they have to be done while the suspension's off, and you don't want to pay someone else to drop the suspension, fit new ones and re-align everything later on.

take it so a main dealership or trusted garage for a second opinion on belts and engine mounts.