How often should brakes be replaced?

There is no fixed mileage or number of years for replacing brakes. Pads wear with how and where you drive, so the answer is to have them measured regularly and replaced when they approach the limit, not on a calendar. In Virginia the practical anchor is your yearly state safety inspection, plus a check of your own whenever you rotate the tires or hear a change in the brakes.

What actually sets the replacement interval

Brake pads are friction material, and friction material is meant to wear away. How fast depends on:

• Where you drive. Stop-and-go traffic and hilly roads wear pads much faster than steady highway miles.
• How you drive. Late, hard braking uses pads up quickly. Coasting early and braking gently makes them last.
• Vehicle weight and load. Heavier vehicles, trailers and loaded cargo put more work into the brakes.
• Pad material. Softer pads grip well and wear faster, harder pads last longer and may be noisier.
• Front versus rear. On most cars the front brakes do more of the work, so they usually wear out first.

Because of this, one car may need pads at a modest mileage and another may go far longer. Your owner's manual lists the manufacturer's maintenance schedule and should be the first thing you check for inspection points.

The limit, and what Virginia checks

The safety line is thin. Virginia's state safety inspection rules direct an inspector to reject a vehicle when pads or linings are "worn to less than 2/32 of an inch in thickness at any point".^[2] By the time pads reach it there is very little margin left. Plan the replacement before they get there.

The law behind this is simple: Virginia law requires brakes adequate to control the movements of and to stop and hold the vehicle, maintained in good working order.^[1]

The inspection is also your reminder. A minimum of two wheels, one front and one rear, must be inspected on each passenger and multipurpose vehicle,^[2] and the inspection is annual: all issued annual inspection stickers shall expire at the end of the last day of the month displayed on the sticker.^[3] Between inspections, ask to have the pads measured at each tire rotation.

Signs you do not need to wait for

Do not wait for the next inspection or the next oil change when you notice:

• a steady squeal or a metallic grinding when you brake (see why brakes squeal)
• a longer stopping distance, or a pedal that feels soft, low or spongy
• the car pulling to one side when you brake, or a pulsing pedal
• a brake pad wear warning light. A brake pad wear warning light is not an automatic rejection, because it is the inspector's job to confirm whether the pads have passed the 2/32 inch tolerance,^[2] but it still means the sensor expects the pads to need attention soon
• the red brake warning light, or fluid near a wheel

If the pedal sinks or the red light stays on, do not drive. Have the car towed.

Pads are not the whole job

Pads wear first, but rotors and drums wear too. The inspection rules reject brake drums or discs that are worn or scored to the extent that their machining would result in a failure to meet manufacturer's specifications.^[2] Waiting until pads are metal-on-metal tends to score the rotor and turns a pad job into a pad and rotor job. The same rules reject vehicles where "grease or other contamination is present on the linings, drums, or rotors",^[2] which is why a leaking seal or caliper should be fixed along with the pads.

Brake fluid, hoses and hardware also age. Ask the shop to look at them whenever the wheels come off, and to give you any recommendations in writing, with the measurements.

One detail to ask about: when wheels are removed, the rules warn that lug nuts must be torqued to the manufacturer's specifications to prevent damage to disc rotors.^[2] A shop that uses a torque wrench or torque-limiting sticks is doing it right.

Keeping brakes lasting longer

• Look ahead and ease off the throttle early so you brake lightly.
• Take unneeded weight out of the car.
• Use a lower gear on long downhill grades instead of riding the brakes.
• Have the pads measured at each tire rotation and keep the written readings, so you can see the trend.

For what a replacement costs and how to compare quotes, see how much a brake job costs in Virginia.

When to call a licensed pro

For the brake work itself. Brake replacement involves lifting the vehicle, working on hydraulic parts and checking measurements against the manufacturer's specifications, and the system is what stops the car. Take it to a qualified repair shop for any inspection beyond looking at the wheel, and for all repair. Ask for the measured pad thickness and rotor condition in writing before you approve work.

Loclis lists Virginia businesses by trade and area. Read more automotive repair answers or what a tire repair costs.

To get a shop to measure and quote your own car, describe the job once.