YES, the brakes should always be “bled” whenever pads and/or discs are changed. In this instance “bleeding” means the removal from the system of some old brake fluid.
What happens if you don't bleed your brakes after changing them?
What happens when air gets into the brake lines and if you don't bleed the brake system? You won't have responsive brakes. You will experience these issues: Spongy brakes.
Do you have to flush brake fluid when changing pads?
Answer: Yes, flushing or changing the brake fluid is legitimate preventive maintenance for your car. We typically recommend a brake fluid flush when we're already changing brake calipers, pads or rotors.16 may 2016
Is it OK to replace brake pads only?
Yes, but it depends on the condition of your brake rotors. If they aren't damaged or thinned beyond the discard thickness, you can definitely change just the worn brake pads. ... As we know, brake rotors and brake pads work together. The brake rotor affects how the brake pads perform and wear over time, and vice versa.9 abr 2021
Do I need to bleed my brakes after changing caliper?
No just bleed the caliper you change. But it never hurts to do them all if you can get the bleeder to open because removing the old fluid is contaminated with rubber particles and it will appear dark, if you notice the fluid that comes out when you bleed it you should bleed them all. But it is not necessary.