Regular maintenance of the brake system is not just a regulatory requirement, but the foundation of your safety on the road. For owners of compact hatchbacks such as Nissan Micra, the issue of timely replacement of consumables is especially acute due to the specifics of urban operation. Brake elements wear out faster with frequent stops in traffic jams and sudden maneuvers.
The rear brakes on this model are often paired with a parking brake mechanism, which adds complexity to the maintenance process. Many car owners mistakenly believe that this is a simple procedure that can be put off until later, but ignoring signs of wear can lead to critical damage to the brake rotors or calipers. In this article we will analyze in detail how to competently carry out replacing rear padswithout resorting to expensive services.
Symptoms of wear and diagnostics of the brake system
The first signal about the need for intervention is a characteristic squeak or squeak when you press the brake pedal. The sound occurs because the worn layer of friction material is completely worn away and the metal base of the pad begins to contact the disc. However, you should not rely on sound alone, since some cheap pads do not have special audio wear indicators.
You should pay attention to the behavior of the car when braking. If Nissan Micra The steering wheel begins to pull to the side, the steering wheel vibrates, or the pedal pulsates; this may indicate uneven wear or jamming of the caliper guides. It is also critical to keep an eye on the indicator on your dashboard if your vehicle is equipped with pad wear sensors.
- 🔊 The appearance of a metallic grinding noise during light braking.
- 📉 Increasing the length of the braking distance on dry asphalt.
- ⚠️ Visually thin layer of friction lining (less than 2 mm).
- 🛑 Uneven heating of the wheels after a trip (one wheel is hotter than the others).
⚠️ Attention: If you hear a sharp metal grinding sound, stop driving immediately and call a tow truck. Continued operation with completely worn out pads will lead to costly replacement of the brake discs and the caliper itself.
Visual diagnostics is the most reliable way to ensure that replacement is necessary. By removing the wheel, you can evaluate the thickness of the working surface. Remember that the rear pads wear out more slowly than the front ones, but their condition directly affects the efficiency of the handbrake.
Selection of necessary tools and consumables
For high-quality work, you will need a standard set of tools that most car enthusiasts have, plus a few specific devices. Pay special attention to the set of keys and sockets, since the mounting bolts on Nissan Micra may be stuck with time and dirt.
You will definitely need a jack and reliable stands for the body. Working under a machine without insurance is strictly prohibited. Also prepare a wire brush to remove rust from components and WD-40 to treat threaded connections. Don't forget about brake fluid in case the reservoir needs to be topped up when the piston is pulled back.
- 🔧 Set of sockets and ratchets (sizes 12, 14, 17 mm).
- 🔨 Hammer and mounting spatula (crowbar) for removing the caliper.
- 🧴Brake Cleaner and guide lubricant.
- 🔑 Special ratchet wrench for rotating the caliper piston.
☑️ Preparation for replacement
The choice of the pads themselves is a separate topic for thought. Original parts Nissan guarantee a perfect fit, but often have a high cost and short service life. An alternative is proven brands like TRW, Brembo or Sangsin, which offer an excellent balance of price and quality. Avoid the cheapest analogues, as they can overheat and “bulge” the disks.
⚠️ Caution: Never use silicone or graphite based lubricant on caliper pistons. Use only high-temperature brake lubricant, otherwise the piston may seize.
Technology for dismantling the old kit
Start the process by cleaning the brake mechanism from dust and dirt. Use a wire brush and spray the brake cleaner liberally onto the caliper and rotor. This will prevent abrasive particles from getting into the new pads and make it easier to access the fasteners.
The next step is to unscrew the caliper guides. They are usually sized to fit a 14mm or 17mm head. After unscrewing, carefully remove the caliper by hanging it on a wire or hook to the body. Don't letso that the caliper hangs on the brake hose - this can lead to damage and fluid leakage.
After removing the caliper, you can easily remove the old pads. Pay attention to the condition of the bracket (guide) in which they walk. If the guides stick, they need to be cleaned and lubricated. Sometimes it is necessary to replace the guide boots if they are torn.
- 🔩 Unscrew the lower caliper guide.
- 🔩 Unscrew the upper caliper guide.
- 🔧 Remove the old pads from the bracket.
- 🧹 Clean the seats from rust and plaque.
What to do with worn pads?
Old pads cannot simply be thrown into the general trash, as they contain toxic substances. It is best to take them to specialized collection points for scrap metal or recycling of auto parts, which service stations often do when exchanging them for new parts.
Pay special attention to the condition of the brake disc. If it is deeply grooved or has uneven wear, replacing the pads will not completely solve the problem. In such cases, it will be necessary to resurface or replace the disc, otherwise the new pads will wear unevenly and quickly.
Installing new pads and piston adjustments
The most difficult stage for the rear brakes Nissan Micra — this is recessing the caliper piston. Unlike the front wheels, the rear piston is often threaded for mechanical screw-in, as it is combined with the handbrake mechanism. You can’t just press it in with a pry bar—you’ll destroy the mechanism.
You will need a special tool or a universal ratchet to rotate the pistons. Insert the tool into the grooves of the piston and, turning clockwise, carefully press it into the caliper body. At the same time, monitor the level of brake fluid in the reservoir under the hood so that it does not overflow.
Вращение поршня: по часовой стрелке (Clockwise)After the piston has gone deep, install the new pads in place. Before doing this, apply a thin layer of heat-resistant grease to the metal backing plates of the pads that contact the caliper. This will reduce noise and vibration when the brakes operate.
Before installing new pads, check that their friction linings do not have burrs or defects. Lightly sanding the edges with sandpaper can improve break-in and reduce the likelihood of squeaking in the first few kilometers.
Reinstall the caliper onto the bracket and tighten the guides to the recommended torque. Don't overtighten them so as to strip the threads, but don't leave the bolts loose either. After assembly, be sure to press the brake pedal several times until it becomes firm so that the pistons are in position.
Correctly screwing in the caliper piston is key when replacing rear pads. If the piston is not pushed in completely, the wheel will not go into place, and the caliper will constantly brake.
The nuances of working with the handbrake mechanism
Many owners Nissan Micra They encounter a problem when, after replacing the pads, the handbrake stops holding. This is due to the fact that the release mechanism inside the piston was not completely unlocked before installing the new, thicker pads. Sometimes additional adjustment of the parking brake cable is required.
The effectiveness of the handbrake is checked on a flat surface with a slope or on a lift. The lever should lock within 3-5 clicks. If the lever stroke is too large, it is necessary to tighten the cables through the adjusting nut located under the car or in the passenger compartment.
- 🚗 Raise the car on a lift or use a jack.
- 🔧 Check the tension of the handbrake cables.
- 📏 Make sure that the wheel rotates freely after releasing the handbrake.
- 🛑 Check the effectiveness of fixation on a slope.
- Every 30-40 thousand km
- Every 50-60 thousand km
- Only when you hear a creak
- Frequency is not important
Dirt or rust in the pad spreading mechanism can cause them to jam. Every time you replace the pads, it is recommended to clean this unit and lubricate the moving parts.
Compatibility and replacement interval table
Below is a summary table that will help you navigate the selection of parts and their service life. This data is relevant for most generations of the model Nissan Micra, but always check your vehicle's VIN when ordering.
| Part type | Original number | Analogues | Service life (km) |
|---|---|---|---|
| Rear pads | 41060-AL60A | TRW GDB1390, Brembo P 20 043 | 30 000 - 50 000 |
| Rear discs | 40206-AL60A | Textar 92034501, Zimmermann 420345.20 | 60 000 - 80 000 |
| Guide lubrication | Red high temp. | Permatex, Liqui Moly | With each replacement |
| Brake fluid | DOT 4 | Castrol SRF, Motul 600 | 2 years or 40,000 km |
Please note that service life depends on driving style. Aggressive driving with frequent emergency braking can reduce the life of your pads by half. Climatic conditions also play a role: in regions with high humidity and reagents, wear occurs faster.
Common mistakes when replacing yourself
One of the most common mistakes is not cleaning the guides. If the caliper guides are soured, the new pads will wear unevenly and the caliper may seize when hot. Always check the movement of the guides with your fingers before assembly.
Another mistake is using the lubricant incorrectly. Applying lubricant to the friction surface of the pads or brake disc will lead to loss of braking effect and possible skidding of the vehicle. Only metal parts that do not come into contact with the disc are lubricated.
Also, do not forget about checking the tightening of the wheel bolts. Insufficient tightening torque can lead to the wheel unscrewing, and excessive tightening can lead to thread breakage. Use a torque wrench to ensure precise compliance with the regulations.
Using a torque wrench when tightening wheel bolts is not a fad, but a necessity for safety. The recommended tightening torque for Nissan Micra is usually 100-110 Nm.
Finally, don't skip breaking in new pads. For the first 200-300 kilometers, avoid sharp braking and stopping completely at high speed. This will allow the friction material to break in to the disc and ensure maximum braking performance.
What to do if the pads squeak?
The squeak can be caused by the absence of anti-squeak plates, lack of lubrication on the back of the pad, or poor quality material. Try lubricating the back and contacts of the bracket with heat-resistant grease. If it doesn’t help, check the quality of the pads themselves.
FAQ: Answers to frequently asked questions
Do the rear pads need to be replaced in pairs?
Yes, rear pads are always replaced in pairs on the same axle (both rear wheels). Replacing only one pad will lead to uneven braking, the car skidding to the side and accelerated wear of the second pad.
How do you know when it's time to change the brake fluid?
It is recommended to change the brake fluid every 2 years or 40,000 km, even if it looks clean. Over time, it absorbs moisture, which lowers the boiling point and can lead to brake failure under intense heat.
Can I use front pads from another Nissan model?
No, front and rear pads have different sizes, shapes and friction characteristics. Using unsuitable parts may result in damage to the brake system and brake failure.
How long does it take to replace rear pads?
If you have experience and the necessary tools, the replacement takes about 40-60 minutes for both wheels. For a beginner, this process may take 1.5-2 hours, as it will take time to study the nuances and search for tools.
Compliance with all recommendations and accuracy when performing work will ensure reliable operation of the brake system. Nissan Micra. Regular monitoring of the condition of the pads and timely replacement is the key to your safety and the safety of your car. Do not put off a visit to the garage or service station if you notice the first signs of wear.