1999-2009 Honda S2000 Parking Brake Problems and Adjustment

By Core Brake Parts Tech Team — Circleville, OH warehouse

The Honda S2000 does not use a separate drum parking brake. Its parking brake is built into the rear disc calipers, and the cable pulls a lever on each caliper that mechanically pushes the piston against the pads. When an S2000 parking brake gets weak, takes too many clicks, or drags, the cause is almost always cable adjustment, a sticking caliper lever mechanism, or a rear pad job where the piston was not wound back and reset correctly.

This guide explains how the system works on the S2000, the factory check, how to adjust it the right way, and which parts to replace when adjustment alone will not fix it.

How the S2000 Parking Brake Works

Each rear caliper on the S2000 has an integral parking brake mechanism. The interior lever pulls a cable to an equalizer, which splits the pull between a left and a right cable. Each cable end hooks onto a parking brake arm on the back of its rear caliper. Pulling the lever rotates that arm, and an internal screw mechanism drives the caliper piston out to clamp the pads on the rotor, with no hydraulic pressure involved.

The same mechanism contains a self-adjuster. As the rear pads wear, the piston ratchets out a little further so the lever travel stays consistent. That is why the rear piston on an S2000 cannot simply be pushed back with a C-clamp like a front piston. Honda's service manual says to rotate the caliper piston clockwise into the cylinder, then turn it back slightly so the cutout in the piston lines up with the tab on the inner pad. Forcing the piston straight in can damage the internal adjuster, and a misaligned piston cutout keeps the pad from seating flat.

Because the parking brake shares pads and rotors with the service brakes, the condition of the rear brake pads and rotors directly affects how well the parking brake holds.

Symptoms and the Factory Check

Common S2000 parking brake complaints:

• The lever comes up very high before it holds, or the car rolls on a slope with the lever set.
• The lever holds after only a few clicks, and the rear brakes feel like they drag or run hot after a drive.
• One rear wheel stays locked or drags after releasing the lever while the other spins freely.
• The parking brake light stays on with the lever down (a switch or fluid-level issue, not an adjustment issue).
• After a rear pad change, the lever travel is suddenly long and the pedal feels low for the first few presses.

Honda gives a simple check. Pull the parking brake lever with 196 N (20 kgf, 44 lbf) of force. The parking brake should be fully applied when the lever is pulled 9 to 13 clicks. More clicks than that means the system is loose; fewer means it is too tight and the rear brakes may drag. Confirm the specification for your exact model year in the factory service manual, since that procedure is taken from the early-car manual.

Causes of a Weak or Dragging Parking Brake

Many S2000s are well past 15 years old, and the cable ends and caliper arms sit right behind the rear wheels where road salt and water collect. A cable that is rusty inside its sheath will not fully return, which keeps the caliper arm partly applied. That shows up as a dragging rear wheel and uneven rear pad wear.

How to Adjust the S2000 Parking Brake

This is the sequence Honda's service manual lays out. Adjustment is done at a nut on the cable equalizer under the center console, not at the wheels.

1. Remove the center console panel to reach the parking brake lever and adjusting nut.
2. Release the parking brake lever fully and loosen the adjusting nut.
3. If the rear calipers were just serviced, start the engine and press the brake pedal several times first. This lets the self-adjusters in the calipers take up pad clearance before you set the cable.
4. Raise the rear of the car, support it on safety stands at the proper lift points, and remove the rear wheels.
5. Check that the parking brake arm on each rear caliper rests against its stop pin. The arm only touches the stop pin when the adjusting nut is loose enough. If an arm will not return to its stop, the cable or caliper is binding and adjustment will not cure it.
6. Tighten the adjusting nut until the rear brakes just begin to drag when you turn the rotors by hand, then back it off until the arms sit on their stop pins and the rotors turn freely.
7. Pull the lever and confirm the brake fully applies within 9 to 13 clicks.
8. Release the lever and confirm both rear wheels turn freely with no drag.

The most common mistake is cranking the nut until the lever feels firm after very few clicks. That pulls the caliper arms off their stops, keeps the pads lightly applied, and cooks the rear pads and rotors.

Parts to Replace When Adjustment Is Not Enough

If the arms return to their stops, the rotors spin freely, and the lever is in the 9 to 13 click range but the car still creeps on a hill, look at the friction material. Glazed or oil-contaminated rear pads and scored rotors lose holding power. Replace the rear pads as an axle set and inspect the rotors. Honda lists a new rear pad lining thickness of 8.9 to 9.1 mm with a service limit of 1.6 mm. For S2000 owners who track or autocross the car, a slotted rotor such as the DBA 4000 Series T3 rear slotted rotor for the 2000-2005 S2000 is a direct replacement for the rear axle.

If one arm will not return or a caliper keeps dragging, the caliper's internal parking brake mechanism or slide pins are the problem. A rebuild means disassembling the caliper, cleaning the parts in brake fluid, and replacing all rubber seals; the service manual specifies Honda DOT 3 brake fluid for the early cars. Most owners find a replacement rear brake caliper quicker and more reliable than rebuilding a corroded adjuster mechanism. Replace clips, shims, and pins with a brake hardware kit at the same time.

A stuck or frayed parking brake cable must be replaced; lubricating a rusted cable rarely makes it return reliably. Whenever a caliper is replaced, it is also a good time to consider the flexible lines. The Russell stainless braided brake line kit for the 2000-2006 S2000 replaces aging rubber hoses and firms up pedal feel.

How Hard Is the Job?

A cable adjustment is an easy driveway job: console panel off, wheels off, one nut. Rear pads are moderate, and the only special step is rotating the piston clockwise to retract it instead of pushing it. A caliper wind-back tool with a plate that engages the piston notches makes this far easier than needle-nose pliers. Take care not to twist the piston boot; Honda recommends lubricating the boot with rubber grease to prevent that. A caliper replacement adds disconnecting the parking brake cable from the caliper arm, a banjo bolt, and a brake bleed. Torque all caliper and banjo bolts to the values in the factory service manual.

A related note for 2006-2007 owners: Honda recalled about 18,352 2006-2007 S2000s built from January 19, 2006 through November 13, 2006 (NHTSA campaign 13V246000, Honda code JA4) because the brake booster may not hold vacuum, reducing brake assist. That affects the service brake pedal, not the parking brake, but if your car falls in that range and has a hard pedal, confirm with a Honda dealer that the recall was completed. For the full rear axle, browse brake rotors and all brake parts.

Frequently Asked Questions

How many clicks should the S2000 parking brake take?

Honda specifies that the parking brake should be fully applied at 9 to 13 clicks when the lever is pulled with 196 N (44 lbf) of force. Outside that range, adjust the cable at the equalizer nut.

Why is my S2000 parking brake loose after changing rear pads?

Retracting the piston resets the self-adjuster. Start the engine and pump the brake pedal several times so the adjusters take up the slack, then recheck the click count before touching the cable nut.

Can I push the S2000 rear caliper piston back with a C-clamp?

No. The piston must be rotated clockwise to retract it, then aligned so its cutout matches the tab on the inner pad. Forcing it straight in can damage the internal parking brake adjuster.

Why does one rear wheel drag after I release the parking brake?

Usually a sticking cable or a caliper arm that does not return to its stop pin. Check that both arms rest on their stop pins with the lever down. If one does not, replace the cable or the caliper.

Does the S2000 have drum-in-hat parking brake shoes?

No. The parking brake is integral to the rear disc calipers and uses the same rear pads as the service brakes, so there are no separate shoes to adjust.

Sources

1. Honda S2000 Service Manual - Parking Brake Check and Adjustment - 196 N lever force, 9-13 clicks, adjustment sequence and post-caliper-service note
2. Honda S2000 Service Manual - Rear Brake Pads Inspection - rear pad thickness 8.9-9.1 mm new, 1.6 mm service limit
3. Honda S2000 Service Manual - Rear Brake Pad Replacement - rotate piston clockwise, align cutout with pad tab, lubricate boot
4. Honda S2000 Service Manual - Rear Brake Caliper Removal/Installation - parking brake cable attaches to the caliper arm
5. Honda S2000 Service Manual - Rear Brake Caliper Overhaul - rebuild steps and Honda DOT 3 fluid
6. NHTSA Recall 13V246000 (Justia record) - 2006-2007 S2000 brake booster recall details
7. The Drive - How to Use a Brake Caliper Wind Back Tool - how integral parking brake calipers and wind-back tools work