Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
| Symptom | Suspected Area | Link |
|---|---|---|
| Low or spongy pedal | Fluid leaks in brake system | - |
| Air in brake system | | |
| Front piston seals (worn or damaged) | | |
| Rear piston seals (worn or damaged) | | |
| Brake master cylinder sub-assembly (faulty) | | |
| Brake booster push rod (adjustment necessary) | | |
| Parking brake actuator O-ring | | |
| Brake drag | Brake pedal free play (insufficient) | |
| Parking brake actuator | | |
| Front disc brake pad (cracked or distorted) | | |
| Rear disc brake pad (cracked or distorted) | | |
| Front brake piston (stuck) | | |
| Front brake piston (seized) | | |
| Rear brake piston (stuck) | | |
| Rear brake piston (seized) | | |
| Vacuum leaks in booster system | | |
| Brake master cylinder sub-assembly (faulty) | | |
| Brake booster push rod (adjustment necessary) | | |
| Brake pull | Front brake piston (stuck) | |
| Rear brake piston (stuck) | | |
| Front disc brake pad (oily) | | |
| Rear disc brake pad (oily) | | |
| Front brake piston (seized) | | |
| Rear brake piston (seized) | | |
| Front disc (scored) | | |
| Rear disc (scored) | | |
| Front disc brake pad (cracked or distorted) | | |
| Rear disc brake pad (cracked or distorted) | | |
| Hard pedal but braking inefficient | Fluid leaks in brake system | - |
| Air in brake system | | |
| Front disc brake pad (worn) | | |
| Rear disc brake pad (worn) | | |
| Front disc brake pad (cracked or distorted) | | |
| Rear disc brake pad (cracked or distorted) | | |
| Front disc brake pad (oily) | | |
| Rear disc brake pad (oily) | | |
| Front disc brake pad (glazed) | | |
| Rear disc brake pad (glazed) | | |
| Front disc (scored) | | |
| Rear disc (scored) | | |
| Vacuum leaks in booster system | | |
| Noise from brakes | Front disc brake pad (cracked or distorted) | |
| Rear disc brake pad (cracked or distorted) | | |
| Front disc brake cylinder mounting bolt (loose) | | |
| Rear disc brake cylinder mounting bolt (loose) | | |
| Front disc (scored) | | |
| Rear disc (scored) | | |
| Front disc brake pad support plate (loose) | | |
| Rear disc brake pad support plate (loose) | | |
| Front disc brake cylinder slide pin (worn) | | |
| Rear disc brake cylinder slide pin (worn) | | |
| Front disc brake pad (dirty) | | |
| Rear disc brake pad (dirty) | | |
| Front disc brake pad (glazed) | | |
| Rear disc brake pad (glazed) | | |
| Front brake anti-squeal shim (damaged) | | |
| Rear brake anti-squeal shim (damaged) | |
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Brake System
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Vacuum Pump
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
- General
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