Brake system Nissan Almera Classic (including models B10 And G15) requires regular attention, and one of the key elements is brake fluid reservoir. This small but critical reservoir is responsible for maintaining optimal brake fluid levels. Neglecting its condition can lead to air entering the system, corrosion of the master cylinder, or even complete brake failure.

In this article we will look at where the tank is located on Almera Classicwhat's his name check for leaks, what signs indicate the need for replacement, and we will provide step-by-step instructions for dismantling/installation. We will pay special attention A unique feature of the tank on this model is its integration with a liquid level sensor, which often fails before the tank itself.

Where is the brake fluid reservoir located on Nissan Almera Classic

On Nissan Almera Classic (including restyled versions) the brake fluid reservoir is located in the engine compartment, on the right in the direction of travel, directly on the brake master cylinder. It is easy to identify by:

  • 🔘 Transparent white plastic housing with a black cover (on earlier versions the cover may be gray).
  • 🔘 Captions DOT 3 or DOT 4 on the cap indicating the type of fluid recommended.
  • 🔘 Two brake pipes that fit to the bottom of the reservoir.
  • 🔘 Electrical connector of the level sensor (if the model is equipped with an indicator on the dashboard).

The photo below shows the exact location of the tank relative to other elements under the hood:

Photo of the location of the tank

The image shows that the brake fluid reservoir is located between the battery and the brake booster. Its cover has characteristic stiffening ribs, and two metal tubes from the main cylinder approach the lower part.

Important: on some versions Almera Classic (especially with engine QG15DE) the tank can be partially closed by the air duct connection. To access it, you will need to temporarily disconnect this pipe by unscrewing the clamp 10 mm.

Signs of a faulty brake fluid reservoir

The brake fluid reservoir is a consumable item that over time loses its seal or becomes covered with microcracks. The main symptoms of its malfunction:

  • 🚨 Liquid leaks on the master cylinder or near the reservoir (the fluid is yellowish or brown in color).
  • 🚨 Brake indicator light comes on on the dashboard, even if the fluid level is normal (indicates a sensor malfunction).
  • 🚨 Sudden drop in liquid level no visible leaks in other parts of the system (may indicate a crack in the tank).
  • 🚨 Corrosion or white coating on the body of the tank (indicates a reaction of the plastic with aggressive components of the liquid).

The last point is especially dangerous: if the tank begins to “bubble” or white flakes, this means that the plastic degrades when exposed to brake fluid. In such cases, replacement is required immediately - plastic particles can clog the channels of the master cylinder.

📊 Which of these signs have you encountered?
  • Liquid leaks
  • Brake light is on
  • Level drop without leaks
  • Tank corrosion
  • No problem

Part numbers and analogues of the tank for Nissan Almera Classic

Original brake fluid reservoir for Nissan Almera Classic has an article number 40520-4M000 (for models with a level sensor) or 40520-4M001 (without sensor). However, original spare parts are often unreasonably expensive (from 2500 to 4000 rubles), so many owners choose high-quality analogues:

Manufacturer Article Note Price, ₽
Nissan (original) 40520-4M000 With level sensor, suitable for all versions Almera Classic 3800–4200
Aisin TBF-003 Japanese quality, complete analogue of the original 2200–2600
Febi Bilstein 23310 German brand, resistant to aggressive liquids DOT 4 1800–2100
TRW PFB460 Without sensor, requires transfer of old sensor 1500–1700
Sasic 2301010 Budget option, suitable for temporary replacement 900–1200

When choosing an analogue, pay attention to:

  1. Availability/absence level sensor (if your model is equipped with it, it is better to take a tank with a connector for the sensor).
  2. Body material - high-quality tanks are made from polypropyleneresistant to DOT 3/4.
  3. Contents: Some analogues are sold without a cover or o-ring.

Step-by-step instructions for replacing the brake fluid reservoir

Replacing the tank with Nissan Almera Classic does not require special skills, but will require accuracy and compliance with safety precautions. Before starting work:

  • 🔧 Prepare 10 mm And 12 mm keys, flat screwdriver, clean rags.
  • 🔧 Buy new brake fluid (DOT 4 recommended for Almera Classic).
  • 🔧 Provide access to the bottom of the tank (removing the air duct may be necessary).

Next follow the instructions:

  1. Disconnect the battery terminal (negative) to avoid short circuit when working with the sensor.
  2. Clean the tank and surrounding area from dirt to prevent debris from entering the system.
  3. Disconnect the level sensor connector (if there is one) - to do this, press the latch and pull it up.
  4. Remove the reservoir cap and using a syringe or bulb pump out the maximum amount of liquid.
  5. Loosen the brake pipe clamps (key 10 mm) and carefully remove them, placing a container to drain the remaining liquid.
  6. Unscrew the two tank mounting bolts (key 12 mm) and remove it from the master cylinder.
  7. Install a new tank in reverse order, after first checking the integrity of the o-ring.

Clean the seat from old fluid and dirt|

Check the O-ring on the new reservoir|

Make sure that the level sensor (if any) is working |

Fill with fresh brake fluid up to the MAX|

Bleed the brakes after replacement (required!) -->

Important: after replacing the tank be sure to bleed the brake system, since air could get into it. For Almera Classic pumping order: right rear → left rear → right front → left front wheel.

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Never use old brake fluid from an old reservoir - it is saturated with moisture and plastic particles, which can damage the master cylinder.

Typical mistakes when replacing a tank

Even experienced car owners sometimes make mistakes that can lead to brake system failure. Here are the most common:

  • ❌ Liquid use DOT 5 instead of DOT 4 - this is a silicone liquid, incompatible with the plastic of the tank Almera Classic.
  • ❌ Tightening the tank mounting bolts without torque — over-tightening can lead to cracks, and weak tightening can lead to leaks.
  • ❌ Ignoring bleeding the brakes after replacement, the air in the system will make the pedal “soft” and increase the braking distance.
  • ❌ Dirt getting into the tank when replacing - even small particles can clog the channels of the master cylinder.
⚠️ Attention: If, after replacing the reservoir, the brake pedal becomes “wobbly” or sinks, this is a sign air entering the system. Bleed the brakes immediately, otherwise braking performance will decrease dramatically.

Another common mistake is mix-up of brake pipes when connected. On Almera Classic The tubes are of different lengths and their connection points are marked on the master cylinder with letters L (left outline) and R (right outline).

How to extend the life of your brake fluid reservoir

The average service life of the tank is Nissan Almera Classic amounts to 5–7 years, but with proper care it can be extended to 10 years. Here are the key recommendations:

  • 🔧 Check the fluid level regularly (every 10,000 km) - its fall indicates leaks or wear of the tank.
  • 🔧 Change brake fluid every 2 years - old fluid becomes saturated with moisture and accelerates corrosion of the tank.
  • 🔧 Use only DOT 4 - liquids DOT 5.1 or DOT 5 aggressive to the plastic of the tank.
  • 🔧 Avoid contact with oil or fuel on the tank - they destroy the plastic.

It is also useful to clean the tank from external contaminants once a year using isopropyl alcohol (do not use gasoline or thinners!). This will prevent the formation of microcracks from exposure to dirt and salt.

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If you often drive off-road, install it on the reservoir rubber protective cover — it will prevent mechanical damage from flying stones.

Frequently asked questions about the Nissan Almera Classic brake fluid reservoir

Is it possible to drive if the brake fluid reservoir is leaking?

For a short time (for example, before a service station) it is possible, but with caution. Monitor the fluid level and add it if necessary. However Driving for a long time with a leaking reservoir is dangerous: Brake fluid is hygroscopic and when it leaks, air enters the system, causing brake failure.

What volume of brake fluid is needed for a complete replacement with Almera Classic?

For a complete replacement (including bleeding) you will need 0.5–0.7 liters liquids DOT 4. If you're just refilling, a bottle will suffice 250 ml.

What is the difference between tanks for Almera Classic B10 and G15?

Structurally they are identical, but G15 (restyling) a tank with modified level sensor (article 40520-4M010). Before purchasing, check the VIN or visually compare the old and new tanks.

Is it possible to repair a cracked tank?

Theoretically, you can seal the crack epoxy glue, but this is a temporary solution. The plastic of the tank is subject to constant loads from pressure and temperature, so repair does not guarantee tightness. We recommend replacement.

Why does the brake light come on after replacing the reservoir?

This may be caused by:

  1. Malfunction level sensor (check its connector).
  2. Low fluid level (add to MAX).
  3. Air entering the system (needs bleeding).

If the light stays on after all the checks, the problem may be master brake cylinder.

If you are not confident in your abilities, replacing the brake fluid reservoir with Nissan Almera Classic It's better to leave it to professionals. However, if you have a minimum set of tools and care, you can perform this procedure yourself, saving on service costs.