1992-2003 Lexus ES300 Parking Brake Problems and Adjustment

By Core Brake Parts Tech Team — Circleville, OH warehouse

On a 1992-2003 Lexus ES300, the parking brake is not part of the rear disc caliper. It is a small set of drum-style shoes that sit inside the hat of each rear rotor, pulled on by cables from the foot pedal. When the parking brake stops holding, feels like it goes to the floor, or drags, the cause is almost always worn or maladjusted shoes, a stretched or seized cable, or rusted hardware, and the fix is to adjust or replace the shoes first and only then set the cable.

How the ES300 Parking Brake Works

All three ES300 generations in this range (1992-1996, 1997-2001 and 2002-2003) use Toyota's rear disc layout with a drum-in-hat parking brake, the same basic design used on the Camry they were built alongside. The rear caliper squeezes pads against the outer face of the rotor for normal stopping. The center "hat" of that same rotor is machined on the inside into a small drum, and a pair of parking brake shoes mounted to the backing plate expands against it when you press the parking brake pedal.

As Brake & Front End describes this layout, the shoes are held to the backing plate with a pin and spring, pushed outward by a cable-actuated lever at the bottom of the backing plate, and adjusted with a star wheel on an adjusting screw at the top. On the ES300 you reach that star wheel through a small hole in the rotor hat, which normally has a rubber plug in it.

Two things follow from that design, and they explain most ES300 parking brake complaints:

• The shoes barely wear, but they also barely get used. Many owners of automatic ES300s rarely set the parking brake. The drum surface rusts, the shoes glaze, and the cable and lever mechanism can seize from lack of movement.
• The shoes are not self-adjusting in normal driving. Clearance is set by hand at the star wheel. If nobody resets it after rear rotor work, the pedal travel grows and holding power drops.

It is also worth knowing what is not wrong with these cars. A search of NHTSA's recall and owner complaint databases for every ES300 model year from 1992 through 2003 turns up no recall and no filed complaint for the parking brake component. The recalls that do exist for this era involve other parts of the brake system, such as a 1997 campaign for moisture freezing in the brake booster vacuum hose and a 2002 campaign for a deformed left front brake tube. In other words, ES300 parking brake trouble is a wear and maintenance problem, not a known factory defect.

Symptoms and How to Diagnose Them

A simple test tells you where to start. Raise the rear of the car safely, release the parking brake and spin each rear wheel. Then have a helper press the pedal a few clicks at a time. If the wheels still spin freely deep into the pedal's travel, the shoes are too far from the drum. If one wheel locks and the other does not, suspect that side's cable or shoes. If a wheel drags with the pedal released, look for a stuck cable or lever before you touch the adjuster.

Common Causes on High-Mileage ES300s

Adjustment lost after rear brake work. The most common one. To get the rear rotor off, the parking brake shoes often have to be backed off first. If the star wheel is not turned back out afterward, the shoes sit far from the drum and the pedal feels loose.

Stretched or corroded cables. Brake & Front End notes that cables stretch over time, and that once the slack is beyond what the adjuster can take up, the cable should be replaced rather than forced. It also warns against spraying oil or solvent into the cable housing, since that pulls grime deeper into it.

Rust on the drum surface and backing plate. Road salt and long periods without use leave the inside of the rotor hat pitted, and the shoe contact pads on the backing plate can rust and bind the shoes.

Contaminated or worn shoes. Toyota's service data for the platform-mate Camry stresses that no oil or grease should be on the shoe lining or the drum surface. A leaking axle seal or careless greasing during service will ruin the grip.

Tired springs and hold-down hardware. The return and hold-down springs lose tension and corrode. A broken spring can let a shoe drag or rattle.

How to Adjust the Parking Brake Shoes

The order matters. Brake & Front End is clear that the shoe clearance is set before the cable. Adjusting the cable to make up for loose shoes just pre-loads the lever and can leave the brake dragging.

1. Safely raise and support the rear of the car, release the parking brake and remove the rear wheel. Thread on a few lug nuts to hold the rotor flat against the hub.
2. Remove the rubber plug from the adjusting hole in the rotor hat and rotate the rotor until the star wheel lines up with the hole.
3. Using a brake spoon or a flat screwdriver, turn the star wheel to expand the shoes until the rotor locks and will not turn.
4. Back the star wheel off by the exact number of notches the factory manual specifies. Toyota's published procedure for the 2002-2006 Camry, which uses this same drum-in-hat design, is to expand the shoes until the disc locks, return the adjuster 8 notches, then confirm the disc turns with no drag. Check your ES300 factory service manual for your year. Brake & Front End's advice here is blunt: if the manual gives a number of teeth, use exactly that number.
5. Spin the rotor and confirm it turns freely, reinstall the plug and repeat on the other side.
6. Only now check the pedal. If it still travels too far with correctly set shoes, adjust the cable to the pedal travel stated in the factory manual.
7. If the shoes are new or the drum surface was rusty, bed the shoes in with a few light, controlled applications at low speed on a safe, empty road before you rely on the brake on a hill.

Replacing the Shoes and What to Replace at the Same Time

If the lining is worn, glazed, cracked or contaminated, replace both sides as a set. The lining on these shoes is thin from new, so there is not much material to lose before holding power fades. The job, as shown in 1A Auto's step-by-step for the 1992-2011 Camry that shares this design, involves removing the rear caliper and caliper bracket, pulling the rotor (you may need to back off the adjuster first), unhooking the return springs, removing the hold-down pins and springs, and prying the parking brake cable out of the lever on the shoe. The backing plate contact points are wire-brushed clean and given a thin film of high-temperature brake grease before the new shoes go on. Keep grease off the lining.

Because you have the rotor off anyway, this is the moment to handle the parts that live around it:

• Hardware kit. Springs, hold-downs and the adjuster are cheap compared with the labor to get back in there. A fresh brake hardware kit prevents a repeat teardown.
• Rear rotors. The parking brake drum is part of the rotor. If the inner drum surface is deeply scored or the rotor face is worn, replacing the rotor fixes both at once. Brake & Front End makes the same point from the other direction: you would not put on a new drum without new shoes. See our brake rotors.
• Parking brake shoes. Shop brake shoes, including stock-style replacement sets from Power Stop, whose Autospecialty parking brake shoes the maker describes as cam ground for fit and post-cured for a faster break-in.
• Cables. If a cable is frayed, kinked or will not return, replace it now rather than adjusting around it.

If you are also doing the front brakes, we carry parts that fit specific ES300 years, such as EBC Yellowstuff front pads for the 1992-1996 ES300, EBC Yellowstuff front pads for the 1997-1999 ES300 and EBC USR slotted front rotors for the 2002-2003 ES300. For everything else, browse all brake parts.

How Hard Is the Job?

A shoe adjustment alone is an easy driveway job: wheels off, plug out, a few turns of a screwdriver per side. It needs no special tools and no bleeding, because the parking brake is purely mechanical.

A shoe replacement is a moderate job. The springs are small and stiff, the parts must go back in the right orientation, and rusted rotors can fight you coming off the hub. Work one side at a time so the other side is a reference. The rear caliper and bracket come off without opening the hydraulic line, so no bleeding is needed, but the caliper bolts, bracket bolts and lug nuts must be tightened to the values in the factory service manual for your ES300.

Take it to a shop if the cable is seized inside its housing, the rotor is rusted solid to the hub, or you are not comfortable judging when a wheel is dragging.

Frequently Asked Questions

Why does my ES300 parking brake pedal go almost to the floor?

Usually the shoes inside the rear rotor hats are too far from the drum, most often because the star wheel was backed off during rear rotor work and never reset. Set the shoe clearance at each wheel first. If the pedal is still long after that, the cable has stretched and needs adjusting or replacing.

Does the ES300 have rear drum brakes?

No. The 1992-2003 ES300 stops with rear disc brakes. The only drum on the rear is the small one machined inside each rotor hat, and it is used only by the parking brake shoes.

Do I need to adjust the parking brake after replacing rear rotors?

Yes. New rotors have a fresh inner drum surface, and the shoes were probably backed off to get the old rotors off. Adjust the shoes through the hole in the rotor hat, then check pedal travel, then bed the shoes in with a few light applications.

Is there a recall on the ES300 parking brake?

We found none. NHTSA's recall and complaint databases show no parking brake recall or parking brake complaint for any 1992-2003 ES300. You can still check your own VIN on nhtsa.gov for open recalls on other systems.

Can I just tighten the cable instead of adjusting the shoes?

That is the wrong order. Tightening the cable to cover loose shoes pre-loads the lever and can cause dragging and overheated rear brakes. Set the shoe clearance first, then the cable.

Should I spray lubricant into a sticking parking brake cable?

No. Oils and solvents attract dirt and wash contamination deeper into the housing. A cable that binds should be replaced.

Sources

1. Brake & Front End - Adjusting Parking Brakes - shoes adjusted before cables, drum-in-hat star wheel layout, cable stretch and replacement, symptoms of maladjustment
2. Brake & Front End - Parking Brake Adjustments and Cables - use the exact factory back-off count, do not lubricate or solvent-flush cables
3. Brake & Front End - Rear Rotor Parking Brake Service - replace shoes along with drum-in-hat rotors
4. Toyota Camry (XV30) service data - Parking brake assembly - expand until the disc locks then return 8 notches, no oil or grease on the lining
5. 1A Auto - Replace Parking Brake Shoes and Hardware, 1992-2011 Camry - removal and installation sequence, cleaning and greasing the backing plate
6. NHTSA recalls - 1997 Lexus ES300 - booster vacuum hose recall, no parking brake recall
7. NHTSA recalls - 2002 Lexus ES300 - front brake tube recall, no parking brake recall
8. NHTSA complaints - Lexus ES300 - no parking brake complaints on file (checked for model years 1992-2003)
9. Power Stop - Autospecialty Parking Brake Shoes - cam ground, post-cured replacement parking brake shoes