Brake fluid for Nissan Almera Classic: how to choose and replace correctly

The braking system is one of the key safety components in Nissan Almera Classic, and its serviceability directly depends on the quality and condition of the brake fluid. Many owners of this popular sedan (also known as Nissan Sunny in some regions) are faced with questions: what kind of fluid to fill, how often to change it, and is it possible to mix different types? In this article we will analyze everything in detail - from technical requirements to step-by-step instructions for replacement.

Feature Almera Classic (N16, produced 2006–2012) is that its brake system is designed for **DOT 3** or **DOT 4** standard fluids, but not all analogues are equally suitable. For example, using a liquid with a low boiling point may cause brake failure under heavy braking. We analyzed factory recommendations, owner reviews and technical data to create a checklist of optimal solutions.

Original brake fluid for Nissan Almera Classic: part numbers and specifications

The manufacturer recommends using the original fluid Nissan Brake Fluid DOT 3 (article KE900-99932) or DOT 4 (article KE900-99931). These fluids fully meet system requirements, including:

• 🔥 Boiling point of a "dry" liquid: not lower than 230°C for DOT 3 and 240°C for DOT 4.
• ❄️ Boiling point of a "wet" liquid (with 3.5% water): 140°C and 155°C respectively.
• 🛢️ Viscosity at -40°C: no more than 1500 mm²/s (critical for winter operation).

Important: original liquid Nissan supplied in sealed containers of 500 ml. There should be a hologram and production date on the lid - this is protection against counterfeiting. If you buy liquid in non-original packaging (for example, in 1 liter canisters), check for a certificate of conformity FMVSS No. 116 or SAE J1703.

Analogues of the original liquid: what can be filled without risk

If the original liquid is not available, certified analogues can be used. Main rule: do not mix DOT 3 and DOT 4 - this will lead to liquid separation and loss of properties. Here are the tested options:

Brand	Type	Article	Features
Castrol	DOT 4	157C4	High boiling point (260°C), compatible with ABS
Liqui Moly	DOT 4	7643	Low hygroscopicity, suitable for humid climates
Motul	DOT 3	105775	Optimal for regions with cold winters (viscosity 1200 mm²/s at -40°C)
Bosch	DOT 4	1987479695	Universal for Japanese and European cars

⚠️ Attention: Liquids DOT 5 And DOT 5.1 silicone based not compatible with Almera Classic. Their use will lead to the destruction of rubber seals in the master cylinder and calipers.

When and how often to change brake fluid in Nissan Almera Classic

According to the regulations Nissan, replacing brake fluid with Almera Classic should be carried out:

• ⏳ Every 2 years - regardless of mileage (due to the hygroscopicity of the liquid).
• 🚗 Every 40,000 km - if the car is used intensively.
• 🔧 After brake system repair (replacement of cylinders, hoses, bleeding).
• 💦 If exposed to moisture or oil into the system (the liquid becomes cloudy).

Critical indicator for Almera Classic: if, when checking with a tester, the moisture content of the fluid exceeds 3%, it must be urgently replaced - the risk of boiling during braking increases by 2-3 times. In regions with high humidity (for example, in the Primorsky Territory), it is recommended to reduce the replacement interval to 1.5 years.

How to check brake fluid moisture without a tester?

If the liquid in the reservoir becomes cloudy or has a reddish tint, this is a sign of high water content. You can also drop the liquid onto a hot surface (for example, on the exhaust manifold): if it boils at a temperature below 150°C, it’s time to change it.

Brake fluid volume in the Nissan Almera Classic system

Full volume of the brake system Almera Classic (including master cylinder, circuits and calipers) is about 0.7–0.8 liters. However, replacement usually requires:

• 🔄 0.5 liters - with partial replacement (pumping without complete drainage).
• 🔄 1 liter - with a complete replacement with bleeding of all wheels.

When purchasing liquid, take a container with a reserve (1 liter), as some will be used to flush the system. If your car has ABS system, the volume may increase by 50–100 ml due to additional lines.

Buy fluid (1 liter DOT 3 or DOT 4)|Prepare a transparent tube for bleeding (∅ 4–6 mm)|Prepare a container for draining old fluid (volume of at least 0.5 l)|Check for the presence of an 8 or 10 wrench for the bleeder fittings|Clean the fittings on the calipers from dirt (use a metal brush and WD-40)-->

Step-by-step instructions for changing brake fluid

It is better to carry out the replacement with an assistant, since you will need to simultaneously drain the fluid and add new one. Procedure:

1. Drain old fluid:

   • 🔧 Unscrew the cap of the brake master cylinder reservoir.
   • 🧹 Using a syringe or pear, remove the maximum amount of liquid from the tank.
   • 🔩 Place a transparent tube on the rear right wheel bleeder fitting, and lower the other end into the container.
   • 🔄 An assistant should press the brake pedal 3-4 times and hold it while you unscrew the fitting ½ turn. The liquid will begin to flow out.

2. Bleed the system:

   • 🔄 Repeat the process until clear liquid comes out (no air bubbles).
   • 🔄 Continue pumping on the remaining wheels in the following order: rear left → front right → front left.
   • 🔧 After pumping each wheel, add new fluid to the tank, avoiding exposing the bottom.

3. Check system:

   • 🚗 Ride 5–10 km and check that there is no air in the system (the pedal should not be “soft”).
   • 🔍 Make sure there are no leaks anywhere (especially on fittings and hoses).

⚠️ Attention: If after replacement the brake pedal remains soft or “falls in,” it means there is air left in the system. Repeat bleeding, starting with the farthest wheel (rear right).

Common replacement errors and their consequences

Inexperienced owners Almera Classic They often make mistakes that lead to breakdowns of the brake system. Here are the most common:

• 🔴 Mixing DOT 3 and DOT 4 → liquid separation, corrosion of metal parts.
• 🔴 Using expired liquid → reduced boiling point, risk of boiling when braking.
• 🔴 Incomplete bleeding of the system → remaining air leads to a “soft” pedal and an increase in braking distance.
• 🔴 Replacement without cleaning the fittings → Dirt will get into the system, which can jam the caliper pistons.

One of the most dangerous mistakes is ignoring signs of fluid aging. If you notice that:

• 🔥 The brake pedal became “wobbly” after intense braking (for example, on a mountain serpentine road),
• 💧 The liquid in the reservoir has darkened or become cloudy,
• 🚨 The icon lit up on the dashboard BRAKE or ABS,

- this is a signal for immediate replacement. Otherwise the risk complete brake failure during emergency braking it increases significantly.

How to extend brake fluid life

The service life of a fluid depends not only on its quality, but also on operating conditions. To avoid premature aging:

• 🛑 Avoid holding the brake pedal for a long time at traffic lights - this leads to overheating of the fluid.
• 🚿 Check regularly system tightness: leaks on the calipers or hoses accelerate the absorption of moisture.
• 🌡️ In hot weather, try not to operate a car with a trailer - the additional load increases the heating of the brakes.
• 🔧 Clean it every six months ventilation holes master cylinder reservoir from dirt (they are located under the cover).

If you frequently drive on mountain roads or participate in racing (such as track days), replace the fluid with DOT 4 Racing with a boiling point not lower than 280°C. This is not necessary for normal use, but in extreme conditions such liquid will save you from boiling.

FAQ: Frequently asked questions about brake fluid in Nissan Almera Classic

Is it possible to mix brake fluids of different brands, but of the same standard (for example, DOT 4 from Nissan and Castrol)?

Yes, but only if both fluids match one standard (DOT 3 or DOT 4) and are glycol based. However, it is better to avoid mixing, as additives from different manufacturers may react. In emergency cases (for example, topping up on the road), this is acceptable, but perform a complete replacement as soon as possible.

What happens if you don't change the brake fluid for more than 3 years?

Fluid aging leads to:

• 🔥 Reducing the boiling point → risk of boiling during heavy braking (the pedal “fails”).
• 💧 Corrosion of metal parts (master cylinder, calipers) due to accumulated moisture.
• 🛑 Increased braking distance by 20–30% due to air in the system.

In critical cases this can lead to complete loss of brakes.

What tool do you need to replace it yourself?

Minimum set:

• 🔧 Key for 8 or 10 (for bleeding fittings).
• 🧹 A syringe or bulb for pumping liquid out of the tank.
• 🔩 Transparent tube (length 30–50 cm, diameter 4–6 mm).
• 🛢️ Container for draining (volume of at least 0.5 l).
• 🧴 New brake fluid (1 liter).

For convenience, you can use special key for bleeding with a check valve (allows you to pump the system alone).

Why did the brake pedal become harder after changing the fluid?

This is normal if:

• 🔧 The system is completely pumped and there is no air in it.
• 🔄 High-quality liquid with a high boiling point was used.

A hard pedal indicates good system performance. If the pedal becomes too tight (requires a lot of effort), check:

• 🔧 Condition of the vacuum brake booster.
• 🔧 Gap between pedal and master cylinder.

Can I use DOT 5.1 brake fluid instead of DOT 4?

Theoretically DOT 5.1 compatible with DOT 4 (both glycolic based), but:

• ✅ It can be filled instead of DOT 4, but not the other way around.
• ⚠️ B Almera Classic this will not provide significant advantages, since the system is not designed for high loads (as in sports cars).
• 💰 DOT 5.1 is more expensive, and the difference in performance for everyday driving is minimal.

If you still decide to upgrade to DOT 5.1, follow complete replacement with flushing the system.