Lexus LS 1989-1994 Brakes Specifications
Explore the detailed brake specifications for the 1989-1994 Lexus LS, including rotor sizes, pad dimensions, caliper types, and fluid requirements. Ideal for maintenance, repair, and performance upgrades.
Overview Specifications
This document provides detailed specifications and technical information about the braking system of the 1989-1994 Lexus LS. It is designed to assist owners, mechanics, and enthusiasts in understanding the brake components, maintenance requirements, and performance characteristics. Use the search functionality to quickly locate specific details or navigate through the sections for a comprehensive understanding of the braking system.
How to Use
Use the search bar to enter keywords related to the braking system, such as 'brake pads' or 'rotor size'. The results will highlight relevant sections and subsections for quick access.
Scroll through the sections to explore major topics like brake components, maintenance, and performance. Each section contains subsections with detailed technical points for easy reference.
Key Specifications
Front Rotor Diameter
296 mm
Rear Rotor Diameter
307 mm
Brake Pad Thickness (New)
10-12 mm
Stopping Distance (60-0 mph)
130 feet
Brake Fluid Replacement Interval
2 years
Available Specifications
Brake Components
This section covers the primary components of the Lexus LS braking system, including the brake pads, rotors, calipers, and brake lines. Understanding these parts is essential for maintenance and troubleshooting.
Brake Components
This section covers the primary components of the Lexus LS braking system, including the brake pads, rotors, calipers, and brake lines. Understanding these parts is essential for maintenance and troubleshooting.
Brake Pads
- Material: Semi-metallic or ceramic
- Thickness: 10-12 mm (new)
- Replacement Interval: Approximately 30,000-50,000 miles
- Compatibility: Specific to 1989-1994 Lexus LS models
Brake Rotors
- Type: Ventilated front and rear
- Diameter: 296 mm (front), 307 mm (rear)
- Thickness: 28 mm (front), 16 mm (rear)
- Material: Cast iron
Brake Calipers
- Type: Single-piston floating calipers
- Material: Aluminum alloy
- Function: Applies pressure to brake pads
- Maintenance: Requires periodic lubrication
Brake Maintenance
This section provides guidelines for maintaining the braking system, including inspection intervals, common issues, and replacement procedures. Proper maintenance ensures optimal performance and safety.
Brake Maintenance
This section provides guidelines for maintaining the braking system, including inspection intervals, common issues, and replacement procedures. Proper maintenance ensures optimal performance and safety.
Inspection Intervals
- Brake pads: Every 10,000 miles
- Brake fluid: Every 20,000 miles or 2 years
- Rotors: Check for wear during pad replacement
- Brake lines: Inspect for leaks annually
Common Issues
- Squeaking or grinding noises
- Reduced braking efficiency
- Brake fluid leaks
- Warped rotors
Replacement Procedures
- Brake pads: Remove caliper, replace pads, and reassemble
- Rotors: Requires wheel removal and caliper detachment
- Brake fluid: Bleed system to remove air bubbles
- Brake lines: Replace if cracked or leaking
Brake Performance
This section highlights the performance characteristics of the Lexus LS braking system, including stopping distance, pedal feel, and advanced features like ABS.
Brake Performance
This section highlights the performance characteristics of the Lexus LS braking system, including stopping distance, pedal feel, and advanced features like ABS.
Stopping Distance
- 60-0 mph: Approximately 130 feet
- 80-0 mph: Approximately 220 feet
- Factors affecting distance: Tire condition, road surface
Pedal Feel
- Firm and responsive
- Minimal pedal travel
- Consistent feedback under heavy braking
Advanced Features
- Anti-lock Braking System (ABS)
- Electronic Brake Force Distribution (EBD)
- Traction Control System (TCS)
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Brakes Specifications
Overview
- Type
- Hydraulic disc brakes
- Configuration
- Front and rear disc brakes
- Platform
- Lexus LS 400
- Material
- Cast iron rotors with semi-metallic pads
- Location
- Front and rear axles
Dimensions
- Front Rotor Diameter
- 11.6 inches / 295 mm
- Rear Rotor Diameter
- 11.2 inches / 285 mm
- Front Rotor Thickness
- 1.1 inches / 28 mm
- Rear Rotor Thickness
- 0.9 inches / 23 mm
- Front Pad Thickness
- 0.5 inches / 13 mm
- Rear Pad Thickness
- 0.4 inches / 10 mm
- Brake Line Diameter
- 0.25 inches / 6.35 mm
- Brake Fluid Capacity
- 1.1 quarts / 1.04 liters
Materials
- Rotors
- Cast iron with anti-corrosion coating
- Pads
- Semi-metallic friction material
- Calipers
- Aluminum alloy
- Brake Lines
- Steel braided with rubber coating
- Brake Fluid
- DOT 3 or DOT 4
Features
- Braking System
-
- Dual-circuit hydraulic system
- Vacuum-assisted power brakes
- Anti-lock Braking System (ABS)
- Caliper Design
-
- Single-piston floating calipers
- Integrated dust seals
- Corrosion-resistant coating
- Rotor Design
-
- Vented front rotors
- Solid rear rotors
- Drilled for heat dissipation
- Safety Systems
-
- Brake force distribution
- Low brake fluid warning light
- Parking brake with automatic adjustment
- Comfort Features
-
- Smooth pedal feel
- Low noise operation
- Minimal brake dust
Safety Features
- Anti Lock Brakes
-
- Prevents wheel lock-up
- Improves steering control during braking
- Brake Assist
-
- Increases braking force during emergencies
- Reduces stopping distance
- Parking Brake
-
- Mechanical rear brake system
- Automatic adjustment mechanism
Comfort Features
- Pedal Response
- Linear and predictable
- Noise Level
- Minimal squeal or vibration
- Dust Management
- Low dust emission pads
- Heat Dissipation
- Efficient cooling design
Accessories
- Upgrade Options
-
- Performance rotors
- Ceramic brake pads
- Stainless steel brake lines
- Maintenance Tools
-
- Brake pad spreader
- Caliper compression tool
- Brake fluid tester
- Replacement Parts
-
- OEM rotors
- OEM brake pads
- Brake fluid reservoir
Maintenance
- Service interval
- Every 12,000 miles or 12 months
- Service Items
-
- Inspect brake pads and rotors
- Check brake fluid level and condition
- Inspect brake lines for leaks
- Test parking brake operation
- Lubricate caliper slide pins
- Maintenance Notes
- Replace brake fluid every 2 years or 24,000 miles
Warranty
- Brake Pads
- Miles: 12,000Years: 1Coverage: Material defects
- Rotors
- Miles: 24,000Years: 2Coverage: Warping or cracking
- Calipers
- Miles: 36,000Years: 3Coverage: Leaks or mechanical failure
- Brake Fluid
- Miles: 24,000Years: 2Coverage: Contamination or degradation
Production Details
- Manufacturer
- Aisin Seiki Co., Ltd.
- Manufacturing Process
-
- Precision casting for rotors
- CNC machining for calipers
- Automated assembly for brake lines
- Quality Control
- Rotor inspection: Ultrasonic testing for defectsCaliper Testing: Pressure and leak testingPad Quality: Friction coefficient verification
- Sustainability Practices
-
- Recycled materials in brake pads
- Eco-friendly coatings for rotors
- Waste reduction in manufacturing
- Production Metrics
- Annual Output: 500,000 unitsDefect Rate: 0.01%Energy Efficiency: 95%
Service Information for brakes Service
Maintenance and service requirements specific to this component
- Inspect brake pads and rotors
- Check brake fluid level
- Test parking brake operation
- Lubricate caliper slide pins
Ensure proper torque on caliper bolts
- Replace brake fluid
- Inspect brake lines for leaks
- Measure rotor thickness
- Check ABS sensor operation
Use only DOT 3 or DOT 4 brake fluid
- Replace brake pads and rotors
- Inspect calipers for wear
- Flush brake hydraulic system
- Test ABS functionality
Perform brake system bleed after fluid replacement
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 Are brake pads and rotors for the 1989-1994 Lexus LS compatible with other Lexus models?
Are brake pads and rotors for the 1989-1994 Lexus LS compatible with other Lexus models?
Brake pads and rotors for the 1989-1994 Lexus LS are specifically designed for this model and may not be compatible with other Lexus vehicles. The LS400, in particular, uses unique brake components due to its size and weight. Always verify part numbers and specifications before purchasing or installing brakes for compatibility.
Q2 What is the recommended maintenance schedule for the brakes on a 1989-1994 Lexus LS?
What is the recommended maintenance schedule for the brakes on a 1989-1994 Lexus LS?
The brakes on a 1989-1994 Lexus LS should be inspected every 12,000 miles or annually. Brake pads typically need replacement every 30,000-50,000 miles, depending on driving conditions. Rotors should be checked for wear and resurfaced or replaced as needed. Brake fluid should be flushed every 30,000 miles or every two years to maintain optimal performance.
Q3 How do I replace the brake pads on a 1989-1994 Lexus LS?
How do I replace the brake pads on a 1989-1994 Lexus LS?
To replace brake pads on a 1989-1994 Lexus LS, first, lift the vehicle and remove the wheels. Unbolt the caliper and hang it securely. Remove the old brake pads and inspect the rotors. Install the new pads, ensuring they are properly seated. Reattach the caliper and tighten the bolts. Finally, reinstall the wheels and lower the vehicle. Test the brakes before driving.
Q4 What should I do if my brakes are squeaking or vibrating?
What should I do if my brakes are squeaking or vibrating?
Squeaking or vibrating brakes on a 1989-1994 Lexus LS may indicate worn pads, uneven rotors, or debris in the braking system. Inspect the pads and rotors for wear or damage. Clean the brake components and apply brake grease to the back of the pads. If the issue persists, resurface or replace the rotors and ensure all hardware is properly tightened.
Q5 How can I improve the braking performance of my 1989-1994 Lexus LS?
How can I improve the braking performance of my 1989-1994 Lexus LS?
To optimize braking performance, upgrade to high-performance brake pads and rotors designed for the 1989-1994 Lexus LS. Ensure the brake fluid is fresh and meets DOT 4 specifications. Regularly inspect and maintain the braking system, including calipers and lines. Consider upgrading to stainless steel brake lines for improved pedal feel and responsiveness.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
1989-1994 Lexus LS400 Service Manual
Coming SoonComprehensive service manual covering brake system maintenance, repair, and troubleshooting for the 1989-1994 Lexus LS400.
Technical Service Bulletin: Brake System Updates
Coming SoonOfficial bulletin addressing common brake system issues and updates for the 1989-1994 Lexus LS400.
Lexus LS400 Brake Parts Catalog
Coming SoonDetailed catalog of OEM and aftermarket brake parts for the 1989-1994 Lexus LS400, including pads, rotors, and calipers.
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Technical Information
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