Brake system Nissan Almera Classic is a critical safety element that ensures effective deceleration and stopping of the vehicle in a variety of road conditions. Many owners mistakenly believe that this budget sedan requires minimal attention to the brakes, but ignoring periodic checks can lead to costly repairs or, much worse, accidents on the road. The design of the unit is quite simple and reliable, but it has its own specific features that every car enthusiast should know about.
The basis of the system is ventilated disc brakes at the front and drum brakes at the rear, which is a classic solution for cars of this class and price segment. Brake discs and pads are subject to natural wear, the rate of which directly depends on driving style and the quality of consumables. Understanding the operating principles of the hydraulic drive and the condition of the components will allow you to promptly respond to changes in vehicle behavior and avoid sudden breakdowns.
Design and arrangement of the brake system
At the core Nissan Almera Classic lies a time-tested platform, where the front axle is equipped with disc mechanisms, and the rear axle with drum mechanisms. This combination strikes a balance between maintenance costs and braking performance. The front calipers have one sliding guide, which simplifies the design, but requires regular lubrication and monitoring the condition of the boots.
The hydraulic drive is divided into two independent circuits, which increases safety in case of failure of one of the systems. Brake fluid circulates through tubes and hoses, transmitting force from the pedal to the caliper pistons. It is important to monitor the fluid level in the expansion tank, as a decrease may indicate a leak or severe wear of the friction linings.
Particular attention should be paid vacuum brake booster, which significantly lightens the pedal effort. If the pedal becomes hard and requires a lot of effort to press, this may indicate a malfunction of the amplifier or air leaks in the system. Regular diagnostics of all components will keep the car in perfect condition.
- 🛠️ Front brakes: ventilated discs, single-piston calipers.
- 🛠️ Rear brakes: drums with mechanical clearance adjuster.
- 🛠️ Drive: double-circuit hydraulic with vacuum booster.
Symptoms and diagnostics
You can identify problems with the brakes even before visiting a service station, simply by listening to the car’s operation while driving. Creak and squeal when pressing the pedal, most often indicate wear on the brake pads or dirt between the disc and the lining. If you hear metal grinding, this is a sure sign that the friction layer has completely worn away and metal is rubbing against metal.
Vibration of the steering wheel or beating of the pedal when braking indicates uneven wear or deformation. brake disc. This phenomenon often occurs after overheating and subsequent sudden cooling (for example, when driving into a puddle on a hot road). This symptom cannot be ignored, as it reduces braking efficiency and increases the braking distance.
If the car pulls to the side when braking, the reason may be jammed caliper guides or uneven wear of the rubber hoses. In such cases, it is necessary to urgently carry out diagnostics, since skidding at high speed can lead to serious consequences. ABS pump It may also make a characteristic hum when the system is activated, but this is normal on rough roads.
⚠️ Attention: Never continue to operate the vehicle if you hear a strong metal grinding sound or feel strong vibration when braking. This can lead to brake disc destruction and wheel failure.
Diagnostics should begin with a visual inspection through the holes in the wheel rims. Check the thickness of the friction lining and the condition of the disc. If the disc has deep marks or grooves, it must be sharpened or replaced. Also check the level brake fluid and its color: dark cloudy liquid requires immediate replacement.
- 🔍 Visual inspection of pads and discs through the spokes of the disc.
- 🔍 Checking the level and color of the brake fluid in the reservoir.
- 🔍 Testing for vehicle pull to the side.
Replacing front brake pads and discs
The process of replacing front brake pads Nissan Almera Classic is not particularly difficult for a person with basic car mechanic skills. Start by loosening the wheel bolts, jack up the car, and remove the wheel. Unscrew the lower caliper mounting bolt that holds it to the steering knuckle, then carefully move the caliper to the side without kinking the brake hose.
Remove the old pads and clean the seats from dirt and rust. Pay special attention to the caliper guides: they must be thoroughly cleaned and lubricated with a special heat-resistant lubricant. If the guides have wear or play, they need to be replaced. Installing new brake pads This is done in the reverse order, but before doing this, the caliper piston must be pressed inward.
When replacing brake discs Make sure that the new parts have the correct parameters and are compatible with your model. Clean the hub from rust so that the disc sits smoothly. Tighten the disc mounting bolts, install the caliper and tighten the fasteners to the recommended torque. After assembly, be sure to press the brake pedal several times to press the pads against the disc and remove the gap.
☑️ Instructions for replacing pads
Sometimes it becomes necessary to sharpen the discs if they have slight wear, but have retained their geometric shape. However, if the disk thickness is less than the minimum permissible (usually 19-20 mm), grooving is impossible and a complete replacement is required. Brake disc must be clean and dry before installation.
⚠️ Attention: Do not use regular lubricant for the caliper guides. Regular oil is washed out by water and loses its properties at high temperatures, which will lead to jamming of the mechanism.
Regular lubrication of the caliper guides and cleaning of the seats is a guarantee that the new pads will wear evenly and will not creak.
Rear drum brake service
Rear brakes on Nissan Almera Classic made in the form of drum mechanisms, which require more careful and careful work during maintenance. To access the internal parts, you must remove the brake drum. If the drum cannot be removed, do not use excessive force as this may damage the threads or the part itself. Often it sticks to guide pins or gets stuck due to rust.
Inside you will find brake pads, springs and a handbrake mechanism. Inspect the friction linings: if they are worn more than 50% or are contaminated with brake fluid, they must be replaced. Also check the condition brake drum from the inside: there should be no deep grooves or signs of overheating.
Pay special attention to springs and return mechanisms. Weak or stretched springs can cause the pads to not move completely away from the drum, causing overheating and increased wear. Drum brake clearance is adjusted automatically when using the handbrake, but sometimes manual adjustment of the eccentric is required.
How to remove a jammed drum?
If the drum does not come off, try lightly tapping it with a rubber mallet through a piece of wood. Sometimes applying penetrating lubricant to the axle and center hole helps. As a last resort, you can slightly loosen the pad adjustment mechanism through the hole in the rear cover.
After replacing the pads, be sure to check the operation of the handbrake. The lever should have a stroke of 3-5 clicks. If the stroke is too large or too small, adjust the cable tension or eccentric. Don't forget that brake fluid should not fall on the friction linings, as this will sharply reduce their effectiveness.
- 🔧 Checking the condition of springs and return mechanisms.
- 🔧 Inspection of friction linings for wear and contamination.
- 🔧 Adjusting the handbrake after assembly.
Selection of consumables and technical specifications
The quality of brake components directly affects driving safety. For Nissan Almera Classic There are both original spare parts and high-quality analogues from well-known brands. When choosing brake pads pay attention to the composition of the friction mixture: ceramic pads generate less dust and are quieter, but are more expensive than metal ones.
Brake discs must match the original dimensions and have proper ventilation. Ventilated discs at the front provide better cooling, which is critical during active driving. For rear drums, it is important to choose kits that include all the necessary springs and retainers to avoid repeated repairs in a short time.
Brake fluid must meet the DOT-4 standard and be changed every 2 years, as it is hygroscopic and absorbs moisture from the air. Water in the fluid lowers the boiling point, which can lead to boiling and brake failure during heavy use. Use only trusted brands and ensure the integrity of the packaging before purchasing.
| Component | Original article (example) | Recommended analogues | Minimum thickness |
|---|---|---|---|
| Front pads | D4311-AX00A | TRW, Brembo, Febi | 2.0 mm |
| Front disc | 40206-AX00A | NiBK, ATE, Bosch | 19.0 mm |
| Rear pads | D4310-AX00A | TRW, Pagid, NK | 1.5 mm |
| Brake fluid | K2100-101 | Castrol, Motul, Shell | N/A |
When purchasing replacement kits, always ensure that all necessary fasteners and hardware are included. Sometimes the original bolts may be stuck, and replacing them with new ones from the kit will simplify the job. Brake system does not tolerate skimping on quality, so choose trusted brands to avoid repeated visits to the service.
Before purchasing new pads, be sure to measure the thickness of the old ones. If they are worn unevenly, this may indicate a problem with the caliper guides, which will need to be corrected before installing new parts.
Bleeding the brake system and servicing hydraulics
Bleeding the brakes is necessary after changing the fluid, repairing the calipers, or when air gets into the system. We compress the air, so the pedal becomes soft and “cottony”. The process starts with the wheel farthest from the master cylinder, that is, the rear right, then the rear left, the front right and the front left. Use Two-person method or a special vacuum pump.
Open the expansion tank cap and monitor the fluid level. It should not fall below the minimum, otherwise new air will enter the system. Unscrew the bleeder fitting on the caliper, put a transparent hose on it and lower the other end into a container with brake fluid. An assistant should press the pedal until you see that the air bubbles have stopped coming out.
After bleeding all wheels, check the brakes on a safe section of the road. The pedal should be elastic and not sink to the floor. If the pedal remains soft, there may be air in the system or a faulty brake master cylinder. In this case, more in-depth diagnostics and replacement of components may be required.
Don't forget that brake fluid tends to absorb moisture, so even in the absence of visible problems, it is recommended to change it every two years. Old fluid loses its properties and can cause corrosion inside the system. Use only the fluid recommended by the manufacturer and do not mix different types.
⚠️ Attention: Brake fluid is aggressive to paintwork and rubber parts. If it gets on the body, wash it off immediately with plenty of water to avoid damaging the paint.
- Once a year
- Once every 2 years
- Once every 3 years
- Only when the pedal became soft
Frequently asked questions and answers
Why does the brake pedal become soft after replacing the pads?
This is normal unless the brakes have been bled or the caliper piston is pressed in. After replacing the pads, there may be air left in the system, or the piston may not have reached the desired position. Press the pedal all the way down several times to press the pads against the disc and check the fluid level.
Is it possible to sharpen brake discs instead of replacing them?
Yes, if the thickness of the disc allows it. However for Nissan Almera Classic the minimum thickness is usually 19 mm. If the disc is already close to this value, the groove will make it thinner and it may overheat or burst. It's better to replace it with a new one.
How often should brake pads be changed?
The service life depends on driving style and the quality of the pads. On average, the front pads last 25-40 thousand km, the rear ones - 40-60 thousand km. Check the pad thickness regularly as visual inspection through the wheel may not be accurate.
What to do if the brakes squeak during a cold start?
A slight squeak during a cold start or after rain can be caused by condensation on the discs. If the squeak persists after warming up, the lining may have worn out, the guides have run out of lubrication, or sand has entered. In this case, diagnostics is required.
Which brake fluid is best for Nissan Almera Classic?
It is recommended to use DOT-4 standard fluid. Popular brands - Motul, Castrol, Shell. The main thing is not to mix different types of liquids and change it every 2 years, as it absorbs moisture.
Proper brake system maintenance Nissan Almera Classic is a guarantee of your safety and comfort on the road. Regular checks, timely replacement of consumables and the use of high-quality spare parts will avoid serious breakdowns and extend the life of the vehicle. Don't ignore the signals your car gives and be careful while driving.