Volvo Gearbox M41 spacer ring brass rear outside diam 37.89 Volvo part no 380813

Your chassis number is on the back of your registration certificate. And also in the car

1. On the bottom plate for the right front seat
2. Center against bulkhead under the hood
3. Right in the engine compartment
4. Near the windshield, on the dashboard
5. In the right rear door pillar