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The Lexus IS250 rear brake caliper is a vital component of the vehicle's brake system that houses brake pistons and brake pads to create the necessary friction to stop the vehicle. It comes in different types based on various factors. Here are some of them.
Based on Construction
Calipers are either brake caliper frames or brake caliper wheel chocks. The brake caliper frame is a crucial part of the braking system. It is designed to hold the brake pads and, in most cases, the brake discs. The primary function of the brake caliper frame is to apply pressure to the brake pads to ensure that a vehicle comes to a stop effectively and quickly. The brake caliper frame acts as a vital bridge between the brake discs and the brake pads. It is usually made from materials like aluminum and steel.
On the other hand, the brake caliper wheel chocks are used to keep a vehicle in place when it is being worked on. This prevents the vehicle from rolling in either direction. The brake caliper wheel chocks are placed behind the wheels to ensure that the car is immobilized and in a fixed position. It enhances safety, especially when working on the brake system or other crucial components of the vehicle. The brake caliper wheel chocks are commonly made from wood or heavy-duty plastic.
Based on the Number of Piston
The Lexus IS250 rear brake caliper can be single-piston, multi-piston, or floating brake calipers. Single-piston brake calipers have a single piston that pushes the brake pads against the rotor when the brake pedal is pressed. This type of caliper is compact, lightweight, and affordable, making it a popular choice for smaller vehicles and applications where high braking forces are not required.
Multi-piston brake calipers have multiple pistons (generally 2 to 6) that equally push the brake pads against the rotors. This results in a more even and efficient braking force across the pad's surface. The design of the multi-piston brake caliper promotes higher braking performance, making it a suitable option for larger vehicles, sports cars, and applications where high braking forces are vital.
Floating brake calipers are another type of brake caliper. It is designed to be mounted on a slide. This allows the caliper to move sideways when the brake pedal is pressed. When the pedal is pressed, the piston in the caliper pushes the inboard pad against the rotor. The caliper slides on its mounting bolts, causing the outboard pad to move closer to the rotor. This action results in friction between the outboard pad and the rotor, stopping the vehicle.
The specifications of the Lexus IS250 rear brake caliper will depend on the model year, as there are variations in design and size. For instance, the 2012 Lexus IS250 rear brake caliper specs are as follows:
Caliper Type:
Aluminum 2-piston caliper brake.
Caliper Size:
36/38mm (piston diameter).
Caliper Color:
Black, blue, and red.
Caliper Weight:
1.2 kg.
Caliper Mounting:
51 mm bolt spacing.
Caliper Seal Type:
NBR (nitrile butadiene rubber).
Caliper Piston Material:
Plastic, aluminum, steel, and titanium.
Caliper Finish:
Natural, anodized, and painted.
Brake Pads:
Semi-metallic, organic, and ceramic.
Brake Rotor Size:
299 mm diameter, 22 mm thickness.
The maintenance of the Lexus IS250 rear brake caliper ensures it works efficiently to stop the vehicle and enhances safety for road users. Here are some tips on how to maintain the brake caliper:
Inspection:
Check the brake caliper for any signs of wear, damage, or leaks at least once a month. Also, inspect the brake pads and rotors for signs of wear.
Cleaning:
Use a soft brush and soap solution to remove dust and debris from the brake caliper.
Brake Fluid:
Change the brake fluid as recommended by the vehicle manufacturer. Also, ensure the brake fluid level is at the right level.
Caliper Lubrication:
Apply a small amount of lubricant to the caliper's moving parts to ensure it operates smoothly.
Brake Pad Replacement:
Replace the brake pads when worn out. Worn brake pads reduce braking efficiency and damage the brake rotor.
Brake Rotor Inspection:
Inspect the brake rotor for wear and replace it if it is warped or damaged.
Professional Inspection:
If one is not sure how to inspect or maintain the brake caliper, seek the services of a professional mechanic.
Wholesale buyers need to understand the factors that affect the quality and performance of brake calipers. This will help them find products that will meet the needs of their target customers. Below are some of the factors to consider when choosing brake calipers:
Caliper Size and Compatibility
Make sure the calipers are compatible with the intended vehicle's make, model, and year. Check the brake rotor size and type (ventilated or not, etc.) to ensure the caliper can properly fit and function with the brake system.
Brake Performance Requirements
Consider the performance requirements based on driving habits and conditions. For standard commuting, OEM-calipers suffice. But for high-performance or heavy-loaded vehicles, aftermarket calipers with more significant pistons and improved cooling are needed.
Quality and Brand Reputation
Source brake calipers from reliable suppliers on Alibaba.com. Check online reviews and ratings to assess the product quality and reliability. Well-known brands may be more expensive but offer consistent quality and durability.
Material and Construction
Calipers are usually made of cast iron or aluminum. Aluminum calipers are lighter and resist corrosion, making them suitable for performance vehicles. The construction material affects the caliper's longevity, weight, and corrosion resistance.
Warranty and After-sales Service
Consider the warranty period and after-sales services offered by the supplier. A more extended warranty indicates the supplier's confidence in product quality. Reliable after-sales service helps solve any issues quickly and efficiently.
Replacing the rear brake caliper on a Lexus IS250 can be a challenging task, but with the right tools and basic mechanical knowledge, it can be done. Here's a step-by-step guide on how to replace the rear brake caliper on a Lexus IS250.
Tools and Materials Needed:
Steps:
The first step in any brake system repair or replacement is to prepare the vehicle. Start by parking the Lexus on a flat surface. Then, apply the parking brake, and chocks the front wheels. After this, loosen the rear wheel lug nuts using a lug nut wrench, then use the car jack to lift the vehicle off the ground and secure it with jack stands.
Remove the wheel covers and loosen the lug nuts using a lug nut wrench, then use the car jack to lift the vehicle off the ground and secure it with jack stands.
Once the wheel is off, remove the brake pads from the caliper.
Use a brake line wrench to loosen and remove the brake line from the caliper. Be careful as the brake fluid will start to leak out once the brake line is removed.
Remove the caliper bolts using a socket wrench and pull the caliper off the rotor. The caliper is held in place by two bolts that are tightened to the brake backing plate.
Before installing the new caliper, it's a good idea to lubricate the sliding pins and install the new brake pads. Then, slide the new caliper over the rotor and tighten the caliper bolts to the brake backing plate.
Use the brake line wrench to tighten the brake line onto the new caliper. Ensure it's tight to prevent any leaks.
To remove any air from the brake system, use a hose clamp to block the brake line and prevent brake fluid from flowing into the caliper. Then, open the bleed valve on the caliper and press the brake pedal a few times until only clear brake fluid comes out. Once done, close the bleed valve and remove the hose clamp.
Put the wheel back on and tighten the lug nuts in a criss-cross pattern. Lower the vehicle to the ground and fully tighten the lug nuts.
Start the engine and press the brake pedal a few times to ensure the caliper is working properly. Then, take the car for a short test drive to ensure everything is working correctly.
Q1: How can I know whether I need to replace my brake calipers?
A1: Some signs will let users know that it's time to replace the brake calipers. They include a warning signal on the dashboard, leaking brake fluid, grinding noise when braking, or the car shakes when stopping. Users may also experience brakes that feel soft or spongy and brake pads wearing out too fast. All these signs indicate that users need to replace their brake calipers.
Q2: Can I drive my car with a damaged brake caliper?
A2: No, it's not safe to drive with a damaged brake caliper. The calipers are crucial for the braking system. They create friction that helps slow down or stop the wheels. A damaged caliper can lead to brake failure, which can cause accidents. Besides, users can damage other brake parts like the pads and discs if they drive with a faulty caliper.
Q3: How long does it take to replace a brake caliper?
A3: Replacing a brake caliper is a manageable task for any mechanic. It will take anywhere from 30 minutes to 2 hours, depending on the vehicle and caliper model. Other factors that may affect the time taken include the mechanic's experience and how fast the user provides the spare parts.
Q4: Can I replace just one brake caliper?
A4: Users can replace only one brake caliper. But it will be a good practice to replace all calipers on one axle. For instance, if the car has a front-wheel drive, users should replace all calipers on the front wheels. This will ensure even braking and maintain car stability. Replacing just one caliper will save on costs, but it may affect the car's performance.
Q5: What is the Lexus IS250 rear brake caliper made of?
A5: Most calipers are made of cast iron or aluminum. The Lexus IS250 rear brake caliper is made of aluminum. Aluminum is lightweight and can improve car performance. It also resists corrosion and is durable.
