Brake fluid reservoir in Nissan Almera Classic (N16) is a small but critical element of the braking system. Not only the effectiveness of braking, but also the safety of the driver depends on its condition. Many car owners pay attention to pads, discs and calipers, forgetting that even a microcrack in the reservoir can lead to moisture entering the system, corrosion of metal parts or complete loss of brakes.
In this article, we will look at how to independently diagnose problems with the tank, when it needs to be changed, and when simple cleaning is enough. We will analyze original articles and high-quality analogues, and also give step-by-step instructions for replacement, taking into account the nuances Almera Classic 2006–2012. We will pay special attention to typical mistakes that owners make when working with the brake system.
Signs of a faulty brake fluid reservoir
The first symptoms of tank problems often go unnoticed until the situation becomes critical. The main sign is drop in liquid level no visible leaks in calipers or pipes. If you regularly add fluid (more than once every 6 months), this is a reason to inspect the tank for cracks or loss of sealing of the lid.
Other warning signs:
- 🔍 Leaks on the tank body - even small drops on the walls indicate microcracks that will expand over time.
- 💨 Brake fluid smell in the engine compartment - especially noticeable when the tank lid is open.
- ⚠️ Brake light comes on on the dashboard (if the level sensor is working).
- 🔧 Corrosion on metal elements of the system - a consequence of moisture entering through a leaky tank.
On Almera Classic With a mileage of more than 150 thousand km, the plastic tank often loses its elasticity due to temperature changes. Models with article number 40520-4M000 are especially vulnerable - their plastic becomes fragile after 8–10 years of operation. If you feel “softness” in the walls when you press the tank with your finger, it needs to be replaced urgently.
⚠️ Attention: Never add brake fluid to a reservoir with visible cracks! Even a temporary solution can result in brake failure due to sudden depressurization.
Original vs analogues: what to choose for replacement
Original brake fluid reservoir for Nissan Almera Classic (N16) has article number 40520-4M000 (for models 2006–2012). Its average price is 2,500–3,200 rubles. However, many car owners prefer analogues, which are 30–50% cheaper, but do not always meet the requirements.
Let's compare popular options:
| Manufacturer | Article | Price, ₽ | Features | Recommendation |
|---|---|---|---|---|
| Nissan (original) | 40520-4M000 |
2 500–3 200 | Fully compatible, durable plastic | ⭐ Best choice |
| ABS | 4052004M00 |
1 800–2 100 | High-quality plastic, but the lid is less airtight | ✅ Good alternative |
| Febi | 23610 |
1 500–1 700 | Budget option, but there are defective seals | ⚠️ Only on a limited budget |
| TRW | PFH400 |
2 200–2 500 | High quality, but not always in stock | ✅ Optimal in price/quality |
When choosing an analogue, pay attention to:
- 🔧 Tank material - must be resistant to
DOT-4(standard fluid for Almera Classic). - 📏 Exact match on fastenings — some analogues have offset holes for clamps.
- 🔒 Quality of rubber seals - cheap analogues can let air through.
- Original Nissan
- ABS
- Febi
- TRW
- Other brand
Step-by-step instructions for replacing the tank
Replacing the brake fluid reservoir with Nissan Almera Classic does not require special tools, but will require care. The whole process will take 30–40 minutes. Important: carry out work on a cold engine to avoid burns and deformation of the plastic.
Required tools and materials:
- 🔧 Set of keys (10 and 12 mm).
- 🧴New brake fluid
DOT-4(at least 0.5 l). - 🧽 Rags and container for draining old liquid.
- 🔨 Flat screwdriver (for removing clamps).
- 🛠 WD-40 (if the fasteners are rusty).
Procedure:
- Drain the old fluid. Disconnect the hoses from the tank (after replacing the container) and allow the liquid to drain. Do not press the brake pedal at this moment!
- Remove the fasteners. Tank on Almera Classic secured with two 10 mm bolts and a plastic clamp. Gently press out the clamp with a screwdriver.
- Install a new tank. Check that the O-ring is in place. Reattach the tank in reverse order.
- Bleed the system. Fill with new fluid and bleed the brakes according to the following scheme: rear right → front left → rear left → front right wheel.
Purchase a new reservoir and DOT-4 fluid|
Clear the area around the tank from dirt|
Prepare a container to drain the old fluid|
Check availability of 10 and 12 mm wrenches|
Provide access to the brake hoses (remove the adsorber if necessary) -->
⚠️ Attention: If after replacing the reservoir the brake pedal becomes “soft”, this is a sign of air getting into the system. It is necessary to repeat the bleeding, otherwise the brakes will not work effectively!
Typical replacement mistakes and how to avoid them
Even experienced car owners make mistakes when working with the brake system. Almera Classic. Let's look at the most common ones:
1. Using the wrong fluid. Some people flood DOT-3 instead of DOT-4, which leads to swelling of rubber seals and leaks. Nissan recommends only DOT-4 with a boiling point not lower than 230°C.
2. Incomplete bleeding of the system. If you do not bleed the brakes after replacing the reservoir, air will remain in the system, which will lead to a “wobbly” pedal. Bleeding must be done strictly according to the scheme, starting from the furthest wheel from the main cylinder.
3. Damage to hoses. When removing the reservoir, it is easy to pinch or tear the brake hoses. Always use soft-nose pliers or special clamps.
4. Ignoring the level sensor. On Almera Classic Since 2010, a liquid level sensor has been installed. If it is not transferred to the new reservoir, the brake light will remain on constantly.
Before bleeding the brakes, check the tightness of all reservoir connections. To do this, just press the brake pedal 3-4 times and inspect the reservoir for leaks.
How to extend the life of your brake fluid reservoir
The average service life of the tank is Nissan Almera Classic - 10–12 years, but with proper care it can be increased to 15 years. Basic recommendations:
- 🔄 Check the fluid level regularly (once a month). A sharp decrease in level is a signal for diagnosis.
- 🧼 Clean the tank from dirt soft brush and alcohol. Abrasive products may damage the plastic.
- ☀️ Avoid overheating. Park in the shade in hot weather—high temperatures speed up the degradation of plastics.
- 🔧 Change fluid every 2 years (or 40 thousand km). Old fluid contains moisture, which corrodes the tank from the inside.
Pay special attention to the tank cap. On Almera Classic it often loses its seal due to wear of the rubber gasket. If the cap does not fit tightly, moisture will enter the system. The gasket can be replaced separately (article no. 40525-4M000).
What happens if you ignore cracks in the tank?
Microcracks expand over time, leading to fluid leakage. In a critical situation (for example, during sudden braking), the pressure in the system will drop and the brakes may fail. In addition, moisture entering through cracks causes corrosion of the master brake cylinder, the repair of which will cost 10–15 thousand rubles.
Cost of service work vs independent replacement
If you are not confident in your abilities, replacing the brake fluid reservoir can be entrusted to professionals. The table below shows the average prices for work in services in Moscow and the regions (for 2026):
| Type of work | Moscow, ₽ | Regions, ₽ | Lead time |
|---|---|---|---|
| Replacing the tank without bleeding | 1 200–1 500 | 800–1 200 | 30 minutes |
| Replacing a tank with bleeding | 2 500–3 000 | 1 800–2 200 | 1–1.5 hours |
| Brake system diagnostics | 500–800 | 400–600 | 20 minutes |
An independent replacement will only cost the cost of the tank (1,500–3,200 rubles) and the liquid (300–500 rubles). However, if you do not have experience bleeding brakes, it is better to entrust this to specialists. Errors during pumping can lead to uneven braking or brake failure.
FAQ: Frequently asked questions about the brake fluid reservoir Nissan Almera Classic
Is it possible to drive with a cracked reservoir if you add fluid?
No! Even small cracks expand over time, and the tank can burst at any time. In addition, moisture enters the system through cracks, which leads to corrosion of metal parts (master cylinder, calipers).
What volume of brake fluid is needed for a complete replacement with Almera Classic?
To completely replace the fluid in the system (including bleeding), you will need 0.8–1 liter DOT-4. However, always take with a reserve (1 liter), since part of the liquid is used for washing.
What is the difference between tanks for Almera Classic 2006 and 2012?
Structurally, the tanks are identical (article no. 40520-4M000), but 2010+ models added a fluid level sensor. When purchasing an analogue, check the presence of a connector for the sensor.
Can I use a reservoir from other Nissan models?
Theoretically, tanks from Nissan Note (E11) and Micra (K12) with article number 40520-4M010, but they may differ in fastenings. It is better to take the original or proven analogues (TRW, ABS).
How to check the tightness of the tank after replacement?
After installing the new reservoir, start the engine and press the brake pedal several times. Inspect the tank and all connections for leaks. If the pedal is “soft”, repeat bleeding.