Volvo Drive-E engines use a timing BELT (not chain). Belt failure is catastrophic engine damage. Must be replaced every 60k miles.
Request timing belt service receipt. Any car over 60k with no belt service record = budget $1,000–$1,500 immediately or negotiate off price.
Est. cost: $1,000–$1,500 timing belt kit service
Source: Volvo Drive-E timing belt service requirement