When do you change rotors on a 530i bmw?

You should consider changing the rotors on a BMW 530i when you notice signs of wear such as excessive scoring, warping, or if the thickness is below the manufacturer's specifications. Additionally, if you experience vibrations during braking or a decrease in braking performance, it may be time to replace them. Regular inspections during brake pad changes, typically every 20,000 to 30,000 miles, can help determine when rotors need replacing. Always refer to your owner's manual for specific maintenance recommendations.