You cannot see the odometer reading on 1991 BMW 525i?

If you cannot see the odometer reading on a 1991 BMW 525i, it could be due to a faulty odometer gear, a burned-out bulb, or a malfunctioning instrument cluster. First, check the dashboard lighting to ensure it's not simply dim. If the lights are functioning, you may need to inspect or replace the odometer gear, which is a common issue in older BMWs. If you're unsure, consulting a mechanic or a specialist in vintage BMWs may be advisable.