Most likely the piston will need to be turned not compressed
To compress the rear brake caliper piston on a 2003 Acura MDX, you need to first ensure the brake fluid reservoir is capped to prevent overflow. Use a caliper tool or a C-clamp to gently push the piston back into the caliper housing. Make sure to apply even pressure and check that the brake pads are properly aligned as you compress the piston. Once fully compressed, you can reassemble the caliper and install it back onto the vehicle.
A special tool (not expensive available at Sears or auto parts) is required Piston is threaded
Remove wheel, remove caliper from mount, not from the brake line or the cable, get proper tool for working on rear disk brakes then twist the piston and compress it back into the caliper, install in reverse order.
I have used a large "C" clamp, to compress the caliper flush to the face.
Rewind it with a piston rewind tool or, at a pinch, use needle nose pliers.
To change the rear brakes on a 2005 Acura TSX, start by safely lifting the vehicle and removing the rear wheels. Next, remove the caliper by unbolting it from its bracket, then slide out the old brake pads. Compress the caliper piston using a C-clamp or brake tool, insert the new pads, and reattach the caliper. Finally, reassemble everything, making sure to torque the lug nuts properly before lowering the vehicle.
Replace the caliper and bleed the brake system.
The 2004 Acura TL has 37.2 in. of rear head room.
The 2004 Acura TSX has 53.5 in. of rear shoulder room.
The 2004 Acura MDX has 56.3 in. of rear hip room.
The 2004 Acura MDX has 61.1 in. of rear shoulder room.
The 2004 Acura MDX has 37.8 in. of rear leg room.