It is generally okay to replace brake pads only, but it is important to keep an eye on the condition of the rotors. If the rotors are in good shape, then replacing the brake pads only can be a cost-effective solution. However, if the rotors are worn or damaged, it may be necessary to replace them at the same time as the brake pads. This is because the brake pads and rotors work together to slow and stop the vehicle, and if one component is not in good condition, the overall braking performance can be affected.
When deciding whether to replace only the brake pads or the pads and rotors, it is important to consult a qualified mechanic. They will be able to inspect the brakes and provide recommendations based on the condition of the components. In some cases, it may be possible to resurface the rotors rather than replacing them, which can save money and extend their lifespan.
In general, it is always a good idea to regularly check the condition of the brake pads and rotors, and to replace them as needed. This can help to ensure that the brakes are always in good working order, which is essential for the safety of the vehicle and its occupants.