Alfa Spider – Timing belt change?

Guuude Motorfreaks, came to this page while browsing and found out that there is a lot of expertise gathered here. I have a very specific question about my Alfa Spider 2.0 TS (EZ 9/2002): My Bella Maccchina is now about 4.5 years old and has 52,000 km down. My workshop has now meant that you have to change the timing belt at the latest at 60,000 km or at an age of 5 years. Since the proper rod costs money, I wanted to get a second (and third, fourth, …) opinion, whether this is true or if they want to generate only early order. Thank you in advance for your answers Greeting from Main