The braking system is the foundation of any vehicle's safety, and Nissan Almera This is no exception. Rear brakes are often overshadowed as the front axle bears the brunt of the braking load, but their proper functioning is critical to vehicle stability on slippery roads or during an emergency stop. Ignoring the wear of the rear elements can lead to caliper seizure, overheating of the brake disc and, as a result, complete brake failure at a critical moment.
Model replacement process Nissan Almera has its own design features, especially when it comes to versions with an electronic parking brake (EPB). Unlike mechanical analogues, this requires a specific procedure for returning the caliper piston, which cannot be performed with a standard tool without the risk of damaging the electric motor. Understanding these nuances will save you time, money and nerves, and will also extend the life of your brake system.
Wear diagnostics and selection of suitable components
Before you begin dismantling the wheels, you need to make sure that replacement is necessary. The main indicator of wear is a distinctive squeaking or metallic grinding sound when you press the brake pedal, but relying on sound alone is dangerous. On many models Nissan Almera pads are installed with integrated wear sensors, which may operate too late if their contacts have oxidized or broken off. The best diagnostic method is to visually inspect the thickness of the friction lining through a window in the caliper or remove the wheel.
The choice of new pads determines not only the braking efficiency, but also the service life of the brake discs. Original from Nissan usually offers a balanced composition that provides soft braking and low noise levels. However, many owners are switching to high-quality analogues, such as TRW, Brembo or Textar, which often surpass factory products in durability and resistance to overheating. It is important to avoid cheap fakes, as their friction material can be too aggressive and quickly destroy the discs.
- π Check the thickness of the friction lining: if it is less than 2-3 mm, replacement is required.
- π‘ Pay attention to the condition of the caliper guides: they should move freely without play.
- π οΈ Inspect the brake disc for deep grooves or thermal cracks.
β οΈ Attention: If you hear metal grinding on metal, this means that the friction layer is completely worn out and the metal base of the pad has begun to grind down the brake disc. In this case, replacing the pads may not save the situation, and an expensive replacement of the discs will be required.
When purchasing, be sure to check the items according to the VIN code of your car, since Nissan Almera was produced with different types of brake systems depending on the year of manufacture and configuration. Incorrectly selected pads may not fit into the caliper, have a different wear sensor length, or differ in the geometry of the pressure plate.
Necessary tools and workplace preparation
To perform the work efficiently, you will need a set of tools, which includes not only a standard garage set, but also specialized devices. You can't do without a jack, reliable support stands and a wheel wrench, but the key is a tool for compressing the caliper piston. For versions with a mechanical handbrake, a regular clamp or a specialized tool is suitable, while for versions with an electric handbrake you will need a diagnostic scanner or a special adapter key.
Preparing the vehicle includes securing it securely on a flat surface. Never work under a machine using only a hydraulic jack. Use strong stands under the body to eliminate the risk of the vehicle falling. It is also recommended to remove the battery terminal if you plan to use the diagnostic scanner to unlock the caliper motors to avoid short circuits.
- π§ A set of socket heads and a ratchet (usually 14, 17, 19 mm).
- π A wheel wrench and a jack with a pair of reliable stands.
- 𧴠Brake cleaner and graphite grease for guides.
βοΈ Preparation for replacement
Pay special attention to cleanliness. Dust and dirt that gets inside the caliper when replacing the pads can cause them to quickly jam. Use compressed air and brake cleaner to thoroughly clean the caliper and rotor before installing new parts. A clean surface is the key to ensuring that the new pads will fit evenly and will not start squeaking after the first few kilometers.
Step-by-step instructions for dismantling and installation
The process begins with removing the wheel and unscrewing the caliper guide bolts. On Nissan Almera The bolts are usually located at the bottom and top of the caliper. Unscrew them and carefully move the caliper to the side, not allowing it to hang on the brake hose - this can lead to deformation of the hose and a leak. Hang the caliper on a wire or hook to the suspension.
Next, remove the old pads and inspect the inside of the caliper. If the piston protrudes too much or shows signs of corrosion, it must be pressed back. For versions with a mechanical handbrake, this is done by simply pressing through a clamp. For versions with an electronic handbrake, the procedure is more complicated: you need to turn on the ignition, apply and release the electronic brake, and then use a scanner to move the piston to the service position. Only after this can the piston be pressed.
- π Remove the wheel and unscrew the two caliper guide bolts.
- π οΈ Remove the old pads and clean the seats with a metal brush.
- π© Install new pads, having previously lubricated the guides with graphite lubricant.
How to return the piston to the EPB version without a scanner?
On some models, you can use a special adapter key that fits onto the splined shaft of the caliper motor. By turning it, you mechanically pull the piston inward, simulating the operation of an electric motor. However, without precise knowledge of the adapter model, there is a risk of the splines breaking off.
Install the new pads into place, making sure they move freely in the bracket. If necessary, replace the pressure springs and anti-squeak plates, which lose their elastic properties over time. Fix the caliper on the guides, having previously lubricated them with a special high-temperature lubricant. It is important that the lubricant gets only on the sliding surfaces, and not on the friction linings.
The main idea: Proper lubrication of the caliper guides prevents jamming and ensures even pad wear on both sides of the disc.
The nuances of working with an electronic parking brake
If your car is equipped with an EPB (Electronic Parking Brake) system, the replacement process requires a special approach. Unlike mechanical systems, where the piston is physically retracted, here an electric motor with a gearbox is installed inside the caliper. If you try to compress the piston without unlocking the electronics, you can burn the motor or damage the gears, leading to costly repairs.
For correct operation, it is necessary to put the calipers into service mode. This is done through the OBD-II diagnostic connector using special equipment or through the on-board computer menu (if such a function is provided). After completing the work and installing new pads, the system must be taken out of service mode, otherwise the handbrake will not work correctly and an error will appear on the instrument panel.
β οΈ Attention: Never try to press the EPB caliper piston using a clamp or pry bar until the electric motor is in service mode. This is guaranteed to disable the mechanism.
After installing new pads and assembling the calipers, be sure to check the operation of the handbrake. It should fix the car on a slope and have a clear move when you press a button or lever. If the instrument panel light flashes or stays on, the initialization procedure may not have been completed correctly.
Running in new brake pads
Many drivers make the mistake of subjecting the brake system to extreme loads immediately after replacing the pads. New pads have friction material that must adapt to the surface of the brake disc. This process is called break-in and takes the first 200-300 kilometers. During this period, sharp braking and complete stops from speeds exceeding 60 km/h should be avoided.
Smooth braking allows the friction layer to adhere evenly to the disc, forming perfect contact. If you ignore this step, uneven layers may form on the disc, which will lead to vibrations in the steering wheel when braking and a decrease in the effectiveness of the brakes. Also, during the break-in period, it is recommended to check the brake fluid level more often, since when the pistons are pressed in, the level in the reservoir may increase.
After completing the break-in, it is advisable to visually check the condition of the pads and discs. Check for uneven wear or brake fluid leaks. Proper break-in ensures that your new brakes will last as long as possible and provide reliable traction in all conditions.
- Every 20-30 thousand km
- Every 40-50 thousand km
- Only when the lamp lights up
- I don't know, I rarely watch it
Common errors and ways to resolve them
When replacing pads with Nissan Almera owners often make mistakes that ruin all their efforts. One of the most common is neglecting to clean the caliper guides. Dirt and old hardened grease prevent the caliper from moving properly, causing one pad to wear out faster than the other and causing the brake rotor to overheat. Regular cleaning and replacement of grease on the guides is a mandatory procedure.
Another mistake is incorrect installation of anti-squeak plates or their complete absence. These thin metal plates serve to dampen vibrations and prevent extraneous sounds. Without them, the pads may vibrate when braking, producing an unpleasant squeaking noise. It is also important not to confuse the inner and outer pads if they have different shapes or the presence of a wear sensor.
- β Do not use regular lithium or graphite grease for caliper pistons - use only special silicone compounds.
- β Don't forget to remove the protective films from the new pads before installation.
- β Do not forget to pump the brake system if its sealed connection has been broken.
| Pad type | Service life (km) | Features | Recommendation |
|---|---|---|---|
| Original Nissan | 30 000 - 40 000 | Optimal balance of price and quality | For standard use |
| Ceramic (Brembo, TRW) | 50 000 - 70 000 | Less dust, resistant to overheating | For active driving |
| Budget analogues | 15 000 - 25 000 | Rapid wear, squeaking possible | Only for a quiet ride |
| Metal | 40 000 - 60 000 | High efficiency, but wears out discs | For a sporty driving style |
β οΈ Attention: If, after replacing the pads, the pedal pulsates when braking, this may indicate a beating of the brake disc or uneven wear caused by overheating.
If you encounter a problem with the caliper jamming immediately after replacement, check the condition of the piston and cuffs. The piston may be corroded and unable to move freely, even with new lubrication. In this case, you will need to remove the caliper, completely disassemble it and repair it, or replace it with a rebuilt one.
FAQ: Answers to frequently asked questions
Below are answers to the most common questions that owners have. Nissan Almera when servicing the brake system. These clarifications will help you avoid common mistakes and save time.
Do I need to change brake discs and pads?
It depends on the condition of the disks. If their thickness is within acceptable values ββand there are no deep marks or thermal cracks, replacing only the pads is acceptable. However, if the discs are worn to a minimum or have severe deformations, they must be replaced as a pair along with the pads to ensure uniform braking.
Is it possible to change pads on only one axle?
It is strictly not recommended to change the pads on only one side of the car (left or right). This will result in uneven braking and may cause the vehicle to skid when braking hard. Always change pads in pairs on the same axle.
What should I do if the handbrake error light comes on after replacement?
Most likely, the system was not taken out of service mode or did not go through the initialization procedure. Try performing the calibration procedure using a diagnostic scanner or contact service. Sometimes pressing the handbrake button repeatedly with the ignition on helps, but this does not work on all modifications.
How often should you check your brake fluid?
It is recommended to check the level and condition of the brake fluid every time you replace the pads or every six months. Brake fluid is hygroscopic and will absorb moisture over time, which lowers its boiling point and can cause it to boil under heavy braking. It is recommended to completely change the fluid every two years.
Regular brake system maintenance is the key to your safety on the road. Don't put off replacing worn pads, even if your car appears to be in good condition. Simple actions such as visual inspection and timely replacement can prevent serious damage and save the lives of you and your passengers.