47201-42020 Brake Master Cylinder for 4720142020 Toyota Rav4 SXA1 2.0L

Product Specification

Product Function Description

The brake master cylinder is a critical component of your Toyota RAV4‘s braking system. This hydraulic device converts the mechanical force of the brake pedal into hydraulic pressure, distributing brake fluid through the brake lines to activate the brakes at each wheel. For the first-generation Toyota RAV4 I (XA10, 1994-2000), a properly functioning brake master cylinder is essential for consistent braking performance, reliable stopping power, and safe vehicle operation. This component is designed to factory specifications, ensuring proper fit and reliable brake system performance. The part number 47201-42020 is confirmed for this application and is compatible with models without ABS .

Common Symptoms of a Failing Brake Master Cylinder

If you are experiencing any of the following symptoms, your brake master cylinder may be failing and in need of replacement:

• Spongy or soft brake pedal: The pedal feels mushy and travels too far before engaging – this indicates internal seal failure or fluid bypass

• Brake pedal slowly sinks to the floor: The pedal continues to drop while holding pressure at a stop – this suggests internal leakage

• Brake fluid leaks: Visible fluid under the vehicle or around the master cylinder area – this indicates external seal failure

• Reduced braking power: The vehicle takes longer to stop than normal – this suggests insufficient hydraulic pressure

• Brake warning light: The dashboard warning light illuminates

• Discolored brake fluid: Dark or contaminated fluid in the reservoir – this indicates moisture or particulate contamination

If you have confirmed these symptoms through inspection, replacing the brake master cylinder is the recommended solution.

Product Specifications

Why Choose This Brake Master Cylinder?

Restores Braking Performance – A failing master cylinder reduces braking effectiveness and compromises vehicle safety. This new cylinder restores proper hydraulic pressure for reliable stopping power.

Direct Replacement – Precision-engineered to match the original cylinder specifications. Direct bolt-on replacement – no modifications required. This part number is confirmed to replace OE 47201-42020.

Proven Compatibility – This cylinder is confirmed compatible with Toyota RAV4 I (XA10, 1994-2000) LHD models without ABS . 

Quality Construction – Manufactured with aluminum construction and includes the reservoir for a complete replacement solution. 

Essential for Vehicle Safety – The brake master cylinder is a critical safety component that directly affects stopping ability and vehicle control.

Package Contents

1 x Brake Master Cylinder Assembly (includes reservoir) . Note: Mounting hardware and brake fluid are NOT included unless stated. Please confirm compatibility with your vehicle model, year, and ABS configuration before purchasing. 

Installation Tips & Common Mistakes

The Mistake When Replacing a Brake Master Cylinder:

❌ Wrong: Failing to bench-bleed the master cylinder before installation, or not bleeding the entire system afterward.

✅ Correct:

1. Always bench-bleed the new master cylinder before installation – This removes trapped air from the cylinder itself.

2. Use a flare nut wrench – Prevents rounding of brake line fittings.

3. Bleed the entire brake system after installation – Follow the correct bleeding sequence (typically furthest wheel first).

4. Use fresh DOT 3 brake fluid – Never reuse old fluid as it may contain moisture and contaminants.

5. Check that the reservoir is included – This part is supplied with reservoir .

⚠️ Remember: If the master cylinder is installed without proper bleeding, the brake pedal will feel spongy or go to the floor. A properly bled system results in a firm, consistent pedal feel.

 Inspection & Maintenance Recommendations

The brake master cylinder is a critical safety component that should be inspected regularly. Any signs of leakage or abnormal pedal feel require immediate attention.

Common indicators that the master cylinder may need replacement:

Inspection Checklist:

• Check the master cylinder for fluid leakage at the cylinder-to-booster joint and at pipe connections.

• Check brake fluid level and condition (dark, contaminated fluid indicates wear).

• Check for a sinking or spongy brake pedal.

• Check brake fluid color—contaminated fluid should be replaced.

Maintenance Tips:

• Replace brake fluid every 2 years or 40,000 km to prevent moisture contamination.

• Use DOT 3 brake fluid as specified.

• Keeping the brake fluid clean and at the right level is key to master cylinder longevity.

After Replacement Still Having Issues?

Replaced the master cylinder but still having brake issues? Check these:

1. Is there air in the brake system? – Bleed the entire system again in the correct sequence

2. Was the master cylinder bench-bled? – If not, air may be trapped inside the cylinder

3. Are the brake lines properly tightened? – Loose connections can allow air to enter

4. Is the brake booster working? – A failed booster can cause a hard pedal, not a spongy one

5. Are the brake hoses in good condition? – Swollen or damaged hoses can cause pedal issues

6. Is there a leak elsewhere in the system? – Check wheel cylinders and calipers for leaks

 Quality Assurance & Service Commitment

Quality Assurance:
Every component is manufactured under controlled production processes to ensure consistent dimensional accuracy and material integrity. Each unit undergoes the following quality checks before packaging:

• Dimensional inspection – critical mounting points and bore diameter are verified against design specifications

• Hydraulic seal test – sealing integrity is confirmed

• Surface finish inspection – corrosion protection and surface quality are visually verified

Packaging Protection:
Each brake master cylinder is individually sealed in protective packaging to prevent contamination and physical damage during storage and transit. The packaging includes a clear part number label for easy identification.

Service Commitment:

 Related Product Recommendations

When replacing the brake master cylinder, it is often recommended to inspect and consider replacing the following related components at the same time.

Brake Booster – The master cylinder mounts to the brake booster. If the booster is failing, brake pedal effort may be increased. Signs include a hissing noise or a hard pedal.

Brake Lines (Metal Pipes) – Inspect brake lines for corrosion or damage. Rusted lines can leak and cause brake failure.

Brake Hoses (Rubber) – Rubber hoses can become swollen, cracked, or soft over time. Swollen hoses can restrict fluid flow and cause a spongy pedal or uneven braking.

Brake Calipers – Inspect the front calipers for leaks, sticking pistons, or damaged dust boots. A sticking caliper can cause pulling, uneven pad wear, and reduced fuel efficiency.

Brake Pads – Inspect brake pad thickness. If pads are worn thin, replace them. Contaminated pads from brake fluid leaks should always be replaced.

Brake Rotors / Discs – Inspect rotors for scoring, warping, or uneven wear. Replace if worn beyond specifications. Warped rotors can cause vibration during braking.

Brake Drum and Shoes (Rear) – If the vehicle has rear drum brakes, inspect the drums for scoring and the shoes for wear or contamination. Replace as needed.