Bleeding the brake system of the <em>Nissan Almera Classic</em>: a complete guide from A to Z

Brake system Nissan Almera Classic (especially models B10 And N16) requires regular maintenance, and bleeding the brakes is one of the key procedures to maintain safety. Even if the brake pedal has become “soft” or the travel has increased, this is a signal that air may have entered the system. Bleeding removes air pockets, restoring braking efficiency.

In this article you will find step by step instructions taking into account the specifics Almera Classic, a list of necessary tools, recommendations for choosing brake fluid and typical mistakes that even experienced car owners make. We will also analyze when pumping can be done independently, and when it is better to contact the service - for example, when replacing the brake master cylinder or ABS repair.

When is it necessary to bleed the brakes? Nissan Almera Classic?

Bleeding the brake system is required not only when there are obvious signs of a malfunction, but also as part of scheduled maintenance. The main symptoms indicating the need for the procedure:

• 🚨 Soft or “sagging” brake pedal - a classic sign of air in the system.
• 🔧 Replacing brake pads, discs or hoses — after such work, pumping is mandatory.
• 💧 Brake fluid leak or replacing it (recommended every 2 years or 40,000 km).
• 🔄 Repair of master cylinder or calipers.
• ⚠️ Activating the ABS lamp on the dashboard (may indicate air in the circuit).

On Almera Classic with ABS, bleeding has nuances: if the ABS unit is faulty or has been removed, special equipment will be required to relieve pressure in the system. This is difficult to do at home, so if you suspect problems with ABS, it is better to contact a service center.

⚠️ Attention: If the pedal remains soft after bleeding, check tightness of brake hoses And master cylinder condition. On Almera Classic The rubber seals in the cylinder often wear out, which leads to air leaks.

Which brake fluid to choose for Nissan Almera Classic?

The manufacturer recommends using liquids of the class DOT 3 or DOT 4. However, there are nuances:

• 🔹 DOT 3 - standard option for most Almera Classic (especially B10 with drum brakes at the rear). It is hygroscopic, so it requires replacement every 2 years.
• 🔹 DOT 4 - preferable for models N16 with disc brakes on all wheels. More resistant to high temperatures, but also absorbs moisture.
• ❌ DOT 5 - not compatible with systems Nissan Almera Classic, since it is made on a silicone basis and can damage rubber parts.

Liquid type	Compatible with Almera Classic	Boiling point (dry/wet)	Service life
DOT 3	✅ Suitable for all models	205°C / 140°C	1–2 years
DOT 4	✅ Recommended for N16	230°C / 155°C	2 years
DOT 5.1	⚠️ Possible, but requires a complete flushing of the system	260°C / 180°C	3–4 years

When mixing liquids of different classes (for example, DOT 3 And DOT 4) properties deteriorate. If you are not sure which fluid was added previously, flush the system completely new liquid.

Tools and preparation for pumping

To bleed the brakes yourself Almera Classic you will need:

• 🔧 8 or 10 mm wrench (for bleeder fittings).
• 🧪 Transparent hose (diameter 4–6 mm) and a container for collecting liquid.
• 🚗 Jack and stops (or lift).
• 🔩 Brake fluid (1 liter with reserve).
• 🧤 Gloves and rags (the liquid is aggressive for paintwork!).
• 🔋 Assistant (to press the brake pedal).

Before starting work:

1. Make sure the fluid level in the reservoir is maximum.
2. Loosen the wheel nuts and raise the car, fixing it on the stops.
3. Remove all wheels for easy access to the calipers.
4. Clean the bleeder fittings from dirt (use a wire brush and WD-40 if necessary).

Wear gloves and protect the body from liquids |

Check the fluid level in the reservoir|

Loosen wheel nuts before lifting|

Raise the car and secure it on supports|

Clean the bleeder fittings from dirt -->

⚠️ Attention: On Almera Classic pumping starts with ABS only after disconnecting the ABS sensor connector (if the unit is faulty). Otherwise, air may remain in the ABS module, and it will have to be pumped to a service station using a scanner.

Step-by-step instructions: how to bleed brakes Nissan Almera Classic

Pumping is carried out in strict sequence, starting with the furthest wheel from the master cylinder. For Almera Classic the order is:

1. Rear right wheel;
2. Front left wheel;
3. Rear left wheel;
4. Front right wheel.

Algorithm for pumping one wheel:

1. Place the hose onto the bleeder fitting and lower the other end into a container with liquid.
2. Ask for an assistant Press the brake pedal 5–6 times and hold it pressed.
3. Unscrew the fitting ½ turn - liquid with air bubbles will come out of the hose. The pedal will “fall” to the floor.
4. Tighten the fitting and repeat the process until no more bubbles appear in the hose.
5. Check the fluid level in the reservoir and add if necessary.

On Almera Classic N16 with rear disc brakes may be required bleeding the brake force regulator (if installed). To do this, after bleeding the rear wheels, loosen the fitting on the regulator and repeat the procedure.

What to do if the air does not come out?

If bubbles continue to come out after several attempts, check:

1. Tightness of connections of hoses and tubes.

2. Condition of the o-rings in the master cylinder.

3. The presence of air in the tank (sometimes bubbles “get stuck” in the upper part).

In extreme cases it may be necessary reverse pumping (using a vacuum pump or syringe).

Typical mistakes when bleeding brakes

Even experienced car owners make mistakes that ruin all their efforts. Let's look at the most common ones:

• 🔴 Failure to follow the pumping sequence - if you start from the front wheel, the air will remain in the rear circuits.
• 🔴 Allowing the liquid level in the tank to drop - this leads to re-suction of air.
• 🔴 Using old or contaminated fluid — Dirt particles can clog fittings or damage seals.
• 🔴 Leveling without an assistant — without pressing the pedal, the air will not leave the system.
• 🔴 Ignoring ABS bleeding — if the ABS unit has been removed or depressurized, air will remain in the module.

Another common mistake is strong tightening of fittings. This may result in stripped threads or deformation of the copper O-rings. Optimal tightening torque - 8–10 Nm.

Bleeding brakes with ABS: nuances for Nissan Almera Classic

On models Almera Classic with ABS (especially N16) pumping is complicated due to the presence of a hydraulic unit. If the system is sealed, standard bleeding is sufficient. But if:

• 🔧 Was ABS unit removed;
• 💥 Happened circuit depressurization;
• 🔄 Replaced hydraulic module or ABS pump,

then special equipment will be required to activate the ABS valves and bleed the module. This cannot be done at home - you need a scanner (for example, Launch X431 or Bosch KTS).

Algorithm for pumping ABS at a service station:

1. Connecting a diagnostic scanner to the connector OBD-II.
2. Activation of the ABS pump and alternate opening of the valves.
3. Pumping of each circuit with pressure control.
4. Reset ABS errors upon completion.

The cost of such a procedure at a service station is from 1,500 to 3,000 rubles, but it is cheaper than repairing the ABS unit due to improper bleeding.

Frequently asked questions about bleeding brakes Nissan Almera Classic

Is it possible to bleed the brakes alone, without an assistant?

Theoretically yes, but it's difficult. Will be required disposable syringe or vacuum pump to create a vacuum. However, the efficiency of such pumping is lower, since there is no control over the pedal. There is also a high risk of air being sucked in again.

How much brake fluid is needed for a complete change?

For Almera Classic enough 0.5–0.7 liters, but it’s better to buy 1 liter with a reserve. When flushing the system, the flow rate increases to 1–1.5 liters.

What to do if the brakes squeak after bleeding?

The creaking is usually associated not with pumping, but with pad wear or corrosion of caliper guides. Check the condition of the pads and lubricate the guides caliper lubricant (For example, Slipkote 220-R).

Can DOT 3 and DOT 4 be mixed?

Short term - yes, but not recommended. DOT 4 has a higher boiling point, and when mixed, the properties deteriorate. If you had to top up DOT 4 in DOT 3, plan on a complete fluid change soon.

How often should you change brake fluid? Almera Classic?

The manufacturer recommends replacement every 2 years or 40,000 km. However, if the vehicle is operated in conditions of high humidity or extreme temperatures, the interval is reduced to 1 year.