I saw your question today when I was seeking an answer as well. Well, the front calipers are 9mm and the rear calipers are 7mm. I was able to wave down a snap-on truck and get mine. Many places had the 7mm in stock but 9mm is usually a special order. Brakes went well after several hours trying to figure out that puzzle. Good luck!
You can sometimes find the 9MM as a part of a large set of Metric hex bits at various auto parts stores. They are fairly expensive.
if your looking for the front abs sensors thay are located in the hubs, and would have to remove front tire, brakes,caliper, and rotor to remove.
Loosen and remove the caliper retaining bolts. Torx T-40 or T-45
9mm hex key front and 7mm rear
There are not any special tools needed to remove the brakes on your 2003 Ford Expedition. You will need a lug wrench, a 9/16 socket, a screwdriver, and a needle nose pliers.
The size is 9mm hex. It needs to be long enough to reach the recessed caliper bolt.
To replace the brake pads on a 96 Grand Am, three tools will be needed. First, a C-Clamp, then a hex key to remove the caliper bolts, and a screwdriver to work the caliper free.
It should be a 3/8" Allen wrench.
Try a TORX T-40 or 45 Many second generation Expeditions (2003-2006) use a 9mm to remove the front caliper and a 7mm for the rear.
It takes a T55 Torx bit on the front calipers.
There may be pictures in the Chilton's manual, but they are not really necessary. Ford brakes are essentially all the same. The Expedition brakes are nearly identical to those on the Explorer. There are two bolts on the back side of the caliper. Loosen these. Remove the rear of these and flip the caliper forward. If you cannot flip it forward, remove both and lift the caliper free. Remove the inner and outer pads, and compress the caliper. **This is important** if the caliper has a square indentation on the inside of the cup, it is likely a turn in type. You will need a special tool for this (inexpensive). If you attempt to compress a turn in type caliper, you will damage the caliper and need to replace it (expensive). Once the caliper is compressed, replace the old pads with new. They are marked so this is easy. Replace the caliper on the bracket over the rotor and replace the two bolts. If the rotor is gouged, you may want to have them turned before you remount the caliper. If you are heavy on the brakes, you might want to replace the rotors. Have them gauged to determine if they need to be replaced. Most auto parts stores will do this for you for free.
the caliper bolts require a 3/8" Allen wrench. You can buy these as a socket at just about any parts store.
I'm pretty sure that takes a 7mm Allen key.