2019-2022 Honda Insight Brake Caliper Problems and Replacement

By Core Brake Parts Tech Team — Circleville, OH warehouse

Most brake caliper problems on a 2019-2022 Honda Insight come down to three things: slide pins that have lost their grease and started to bind, a rear caliper whose electric parking brake mechanism was forced back instead of retracted properly, and old brake fluid that lets moisture corrode pistons from the inside. The fix is usually new slide hardware and pads, sometimes a caliper, and on the rear axle it always involves putting the electric parking brake into service mode first.

How the Insight's Brakes and Calipers Are Laid Out

Every 2019 Insight trim, LX, EX and Touring, uses power-assisted brakes with ventilated front discs and solid rear discs, plus ABS, Electronic Brake Distribution and Brake Assist, according to Honda's own trim guide. There are no rear drums on this car, so you have four calipers to look after.

The Insight also has an electric parking brake with automatic brake hold. Instead of a cable and hand lever, a switch on the console tells a small motor at each rear caliper to drive the piston out and clamp the pads. Brake hold keeps pressure on the brakes at a stop and releases it when you touch the accelerator. That design is convenient, but it changes how the rear calipers are serviced, and it is behind a lot of the rear caliper trouble people run into after a do-it-yourself pad job.

Because the Insight is a hybrid, regenerative braking handles a share of normal slowing. The friction brakes see less work than on a conventional compact car, which sounds like good news, but it also means pads and slide pins can sit in the same position for long stretches, and rust has more time to build up on rotor faces and pins in wet or salted climates.

Common Insight Caliper Problems and Their Symptoms

Sticking slide pins

This is the most common complaint on any sliding caliper, and the Insight is no exception. ADVICS, a major OE brake supplier to Japanese automakers, lists brake pad noise and excessive pad wear as the symptoms, and traces the cause to slide pins that rust after their grease runs out and to boots and sleeves damaged by heat and friction. Brake and Front End's technical team adds that a caliper that cannot slide shows up as one pad worn far more than the other, or uneven wear across a pad.

What you notice from the driver's seat:

• The inner pad on one wheel is much thinner than the outer pad.
• A pull to one side under braking, or a wheel that feels hotter than the others after a drive.
• A squeal or grinding from one corner long before the other side wears out.
• Fuel economy drops a little because one caliper is dragging.

Rear caliper damage from the electric parking brake

On a Honda with an electric parking brake, the rear caliper piston is driven by a spindle inside the caliper. Honda's own service procedure for its electric-parking-brake calipers has the technician connect a scan tool and enter BRAKE PAD MAINTENANCE MODE so the spindle returns to its initial position before the caliper is removed. Skip that step and push the piston back with a C-clamp, and you risk damaging the actuator or the internal mechanism. Symptoms afterward include a parking brake warning light, a brake system message, the parking brake failing to apply or release, or a rear wheel that drags.

Seized or leaking pistons

Brake fluid absorbs moisture over time, which is why Honda tells Insight owners to replace it every 3 years regardless of mileage. Old fluid lets corrosion form behind the piston seal. The piston then sticks partly applied, or the seal starts to seep. Look for a wet, dark residue on the inside of the wheel, a dropping fluid level in the reservoir, or a soft pedal.

Torn boots and stuck bleeder screws

A torn piston dust boot lets water and road grit onto the piston, and a bleeder screw that has rusted in place can snap when you try to bleed the system. Either one is a good reason to replace the caliper rather than rebuild it.

How to Diagnose a Bad Caliper on Your Insight

1. Compare pad wear side to side and inner to outer. Even wear on both pads of a caliper means the caliper is sliding. Heavy inner-pad wear points to seized pins. Heavy wear on both pads of one corner points to a piston that is not retracting.
2. Feel the wheels after a short drive. Carefully hold your hand near each wheel. One noticeably hotter than its partner on the same axle is dragging.
3. Pull the slide pins. They should slide in and out by hand with light resistance. Rust, dry grease, or a swollen boot means new hardware.
4. Check the boots and look for fluid. Any wetness around the piston or at the hose fitting means the caliper or hose needs attention.
5. Scan for codes on the rear. If the parking brake light is on, read electric parking brake codes with a scan tool that supports Honda before replacing parts. A motor or wiring fault is diagnosed differently from a hydraulic one.

The Fix: Which Parts to Replace

Most Insight caliper complaints are solved without a new caliper. Clean the bracket, replace the slide pins, boots and abutment clips with a brake hardware kit, lubricate the pins with a high-temperature caliper grease, and install new pads. Brake and Front End notes that high-temperature caliper lubricant on all sleeves, bushings and sliding surfaces reduces noise and allows maximum pad and caliper life.

Replace the caliper itself when the piston is seized, the seal leaks, the boot is torn, the bleeder is stuck, or a rear electric-parking-brake actuator has failed. Browse replacement brake calipers and confirm the part is listed for your Insight, front or rear, and left or right. Rear calipers for this car carry the parking brake motor, so check whether the replacement includes it or whether you transfer your original.

When the pads are worn, pair the job with fresh friction. We carry 2019-2022 Honda Insight front ceramic brake pads, and you can see more options in our ceramic brake pads collection. Ceramic compounds suit the Insight well: low dust, quiet, and a good match for a light commuter car.

What to Replace at the Same Time

• Pads on both sides of the axle. A dragging caliper usually ruins its own pads, and you want matched friction left and right.
• Rotors if they are scored, heat-spotted or below the minimum thickness cast into them. A caliper that dragged often leaves a heat-damaged rotor. See brake rotors.
• Calipers in pairs when one has failed from age. If one side has corroded internally, the other side has the same fluid and the same miles.
• Brake fluid. Any time a caliper is replaced the system has to be bled. Use Honda DOT 3 from a sealed container, and if the fluid is near its 3-year change, flush the whole system.
• Brake hoses if cracked or swollen. A collapsed hose can hold pressure on a caliper and mimic a sticking piston.

How Hard Is the Job?

The front calipers are a straightforward job for someone with basic tools: two slide bolts hold the caliper to the bracket, and the bracket bolts hold it to the knuckle. Torque every fastener to the value in the factory service manual, and bleed the caliper afterward.

The rear is harder because of the electric parking brake. You need a scan tool that can put the Honda system into brake pad maintenance mode, you need to disconnect the actuator connector before removing the caliper, and you need to cycle the parking brake after reassembly. Honda's own rear-caliper bleed procedure on its electric-parking-brake models also has specific steps to clear air trapped around the spindle. If you do not have that scan tool capability, have the rear calipers done by a shop and handle the fronts yourself.

After any caliper or pad work, pump the pedal until it is firm before moving the car, check the fluid level, and bed the new pads in with several moderate stops from medium speed.

Frequently Asked Questions

Is there a brake caliper recall on the 2019-2022 Honda Insight?

No. NHTSA's recall records for the 2019, 2020, 2021 and 2022 Insight list recalls for items such as the fuel pump, seat belts, airbag sensing and a DC-DC converter, but none for brake calipers. Check your own VIN on nhtsa.gov to be sure.

Can I push the Insight's rear caliper piston back with a C-clamp?

Not until the electric parking brake has been retracted. Use a scan tool to put the system into brake pad maintenance mode first, then compress the piston as the service procedure directs.

Why is only my inner brake pad worn out?

That is the classic sign of seized slide pins. The piston keeps pressing the inner pad, but the caliper cannot slide to pull the outer pad in. New pins, boots and high-temperature grease usually fix it.

What brake fluid does the Insight use?

Honda specifies Honda DOT 3 brake fluid, and says to replace it every 3 years independent of the Maintenance Minder reminders.

Do I need to replace calipers in pairs?

It is not required, but it is good practice when a caliper has failed from age or corrosion. Both sides have seen the same fluid and conditions, and matched calipers help the car brake straight.

Sources

1. Honda Info Center - 2019 Insight Features by Trim - ventilated front and solid rear disc brakes, ABS, EBD and Brake Assist on all trims
2. Honda Info Center - 2019 Insight Electric Parking Brake with Automatic Brake Hold - electric parking brake and brake hold operation
3. Honda Owners - 2019 Insight Maintenance Minder - replace brake fluid every 3 years
4. NHTSA recall records - 2019 Honda Insight - no brake caliper recalls listed (2020-2022 checked the same way)
5. Honda Service Bulletin 18-129 (filed with NHTSA) - Honda electric-parking-brake rear caliper procedure: brake pad maintenance mode, actuator connector, spindle air, DOT 3 fluid
6. ADVICS - Troubleshooting Caliper Slide Pin Sticking - symptoms and causes of sticking slide pins
7. Brake and Front End - Binding Mounting Pins Tech Tip - uneven pad wear and high-temperature caliper lubricant