Parts for your 2020 Mitsubishi Asx-Brake wheel cylinders

2020 Mitsubishi ASX brake wheel cylinders

Based on technical references including Mitsubishi Motors Australia’s 2020 ASX specifications and workshop literature, plus independent parts catalogues and service data (e.g., Bendix application guide, Repco/Autodata fitment lists), the 2020 ASX sold in Australia and New Zealand is fitted with rear drum brakes. That setup uses brake wheel cylinders, so this part is relevant to the vehicle.

On the 2020 Mitsubishi ASX, the brake wheel cylinders sit inside each rear drum assembly at the top of the backing plate. Their job is simple but critical: when the driver presses the pedal, hydraulic pressure pushes the wheel cylinder’s two pistons outward, forcing the brake shoes against the drum to slow the car. If a cylinder leaks, binds, or loses internal sealing, braking performance drops and the pedal can feel spongy, uneven, or sink slowly at a stop.

As part of routine servicing, wheel cylinders deserve a close look. Technicians should check for:

• Moisture, staining, or dust caked with brake fluid on the backing plate or inside the drum
• Torn dust boots, sticky pistons, or any seepage at the line connection
• Uneven shoe wear, grabbing, pulling, or a long handbrake travel
• Brake fluid condition, follow the vehicle’s maintenance schedule and replace fluid at the recommended interval (commonly every 24 months), using the type shown on the reservoir cap (typically DOT 3 or DOT 4)

There’s no fixed replacement interval for wheel cylinders, they’re changed on condition. Replace them if they’re leaking, corroded, seized, or if there’s persistent rear brake imbalance. It’s best practice to replace wheel cylinders in axle pairs to maintain even braking. When a cylinder has leaked onto the linings, the rear shoes should be replaced as well because fluid contamination can’t be reliably cleaned away.

During replacement, use new sealing washers where required, tighten the line fittings correctly, and bleed the system thoroughly. After refitting drums and adjusting the self-adjusters/handbrake, bed the rear brakes in gently over the first couple of hundred kilometres. A short recheck for leaks, pedal feel, and handbrake travel after a test drive is good insurance.

Common symptoms that send ASX owners to the workshop include a soft pedal, the car pulling to one side under braking, or a fluid level that keeps dropping. Any of those is a sign to stop driving and get the brakes inspected promptly.

Popular questions

Does a 2020 Mitsubishi ASX have brake wheel cylinders?
Yes. Australian and New Zealand–market 2020 ASX models use rear drum brakes, which rely on wheel cylinders to push the brake shoes onto the drum. This is supported by Mitsubishi specifications and major brake/parts catalogues for the model. If in doubt, a quick peek through the rear wheel opening or a VIN-based parts check will confirm it.

How often should wheel cylinders be replaced on a 2020 ASX?
There’s no scheduled interval, they’re replaced on condition. Have them inspected whenever the rear brakes are serviced or if there are symptoms like a soft pedal, grabbing, or fluid around the backing plate. Keep brake fluid fresh at the recommended interval (often every two years), as old, moisture-laden fluid encourages internal corrosion.

Can wheel cylinders be rebuilt, or should they be replaced?
Some can be rebuilt with seal kits, but on a daily-driven ASX most workshops prefer full replacement for reliability and warranty. New assemblies are inexpensive, save time, and reduce the risk of a repeat leak compared with rebuilding a pitted bore.