<em>Nissan Almera Classic</em>gas tank: volume, replacement, repair and useful tips

Introduction

Nissan Almera Classic (also known as Nissan Almera B10 or Samsung SM3 in some countries) is a popular sedan that is still actively used on the roads of the CIS. One of the key elements of the fuel system of this car is the **gas tank**, the condition of which determines not only the range, but also driving safety. In this article we will look at everything you need to know about the gas tank. Almera Classic: from technical characteristics to the nuances of repair and replacement.

Owners often face questions: what is the actual volume of the tank, how to remove it correctly, what signs indicate the need for repair? We have collected up-to-date information including step by step instructions, diagnostic tips and even rare life hacks that will help you save on the service. Let’s also look at myths, for example, about the “hidden reserve” of fuel and the impact of gasoline quality on the life of the tank.

Gas tank specifications Nissan Almera Classic

Standard fuel tank capacity Almera Classic (body B10, 2006–2012) is **50 liters** according to factory specification. However, the actual filling volume may differ by 1–2 liters depending on the design of the filler neck and the position of the vehicle (for example, on an uphill or downhill slope). It is important to take into account that the passport indicates nominal volume, not the maximum.

The tank is made of **steel sheet** with an anti-corrosion coating, which is typical for cars of that period. The wall thickness is about 1.2–1.5 mm, and in places of welds it can be thinner. This makes it vulnerable to mechanical damage from off-road driving or impacts from below. Installed inside the tank fuel module (pump + level sensor), which is attached through the top cover.

• 🔧 Tank material: zinc coated steel
• ⛽ Nominal volume: 50 l (actually - 48–52 l)
• 📏 Dimensions: ~1200×500×300 mm (length×width×height)
• 🔩 Fastening: 4 bolts to the body + pipe clamps
• 🚗 Location: under the rear seat, on the left in the direction of travel

Feature Almera Classic — lack of a **protective screen** of the gas tank in the basic configuration. This increases the risk of breakdown when hitting obstacles. In some countries (for example, Russia), owners install protection themselves, using aluminum sheets or special kits from Nissan for Almera N16 (suitable with modifications).

Signs of a gas tank malfunction: when to sound the alarm

Problems with the gas tank Almera Classic often disguised as other fuel system malfunctions. However there is specific symptoms, which directly indicate the need to diagnose the tank:

• 💨 Smell of gasoline in the cabin - a sign of a crack or loose fit of the hatch cover. It is especially dangerous if the smell intensifies when refueling or after parking in the sun.
• ⚠️ Sudden drop in fuel level no leaks under the car - may indicate a malfunction of the level sensor or a breakdown of the tank in the upper part (fuel evaporates without dripping to the ground).
• 🔊 Extraneous sounds from under the rear seat (gurgling, knocking) - often associated with peeling of the anti-corrosion coating or water entering the tank.
• 🚘 Jerks when moving at low speeds - may be caused by a clogged fuel filter inside the tank (fuel pump mesh).

One of the most insidious signs is rust appears on the tank neck or around the filler plug. This signals the beginning of corrosion inside the tank, which will eventually lead to a leak. On Almera Classic with a mileage of more than 150 thousand km, this occurs in 60% of cases (according to service centers).

⚠️ Attention: If after refueling the indicator lights up on the dashboard CHECK ENGINE, and after 10–15 minutes it goes out - this may be due to air entering the fuel system through a microcrack in the tank. Diagnose the error code (often P0171 or P0174).

Symptom	Probable Cause	Urgency of repair
The smell of gasoline in the trunk	Crack in the top of the tank or leaking pipes	⭐⭐⭐⭐⭐ (critical!)
Level sensor shows incorrectly	Worn float or oxidation of sensor contacts	⭐⭐⭐ (average)
The car stalls on bumps	Detachment of pipes or low fuel level in the tank	⭐⭐⭐⭐ (high)
Corrosion on the filler neck	The initial stage of tank rusting	⭐⭐ (prevention)

How to remove the gas tank Nissan Almera Classic: step by step instructions

Removing the gas tank Almera Classic - a task of medium complexity that requires accuracy and compliance with safety precautions. Important: before starting work, make sure that there is less than 10 liters of fuel in the tank (or drain it through a hose into a canister). Also prepare your tools:

• 🔧 Socket set (10, 12, 14 mm)
• 🔨 Phillips and flat head screwdriver
• 🛠️Pliers and clamp wrench
• 🧤 Rubber gloves and goggles
• 🧲 Magnet for bolts (so as not to lose fasteners)

Step-by-step algorithm:

1. Disconnect the battery (remove the negative terminal).
2. Raise the rear of the car on jacks or drive it into a viewing hole.
3. Remove protective cover (if installed) under the tank.
4. Disconnect fuel pipes (flow and return) and electrical connector fuel pump.
5. Loosen the clamps securing the tank to the body (4 bolts x 12 mm).
6. Carefully lower the tank, supporting it from below (the weight of the empty tank is ~8 kg).

Disconnect battery|

Drain fuel (less than 10 l)|

Prepare tools and container for gasoline |

Provide ventilation (work outdoors)|

Check availability of spare clamps and gaskets -->

The hardest part is disconnecting the fuel lines. On Almera Classic they are attached plastic latches, which break when removed inaccurately. We recommend using a special puller for fuel quick releases (costs ~300 rubles). If the latches are broken, they can be replaced with standard clamps from VAZ (article 2108-1104070).

⚠️ Attention: Do not use open flames or sparking tools near the tank! Gasoline vapors can ignite even from a static discharge. Work in a well-ventilated area or outdoors.

What to do if the tank mounting bolts are rusty?

If the bolts do not come off, treat them with a penetrating lubricant (for example, WD-40) and let stand for 10-15 minutes. Do not use excessive force - stripped threads in the body will require welding. In extreme cases, the bolts can be drilled out, but then you will have to cut a new thread or use larger diameter bolts with bushings.

Repair vs replacement: what to choose for the gas tank Almera Classic?

Cost of a new gas tank for Nissan Almera Classic (original 17700-BM400) is ~15–20 thousand rubles, and the analogue is from Dello or Febi — 8–12 thousand rubles. Repairs are cheaper (from 3 thousand rubles), but not always advisable. Let's look at the pros and cons of each option:

Criterion	Repair	Replacement
Cost	3–8 thousand rubles.	8–20 thousand rubles.
Service life	1–3 years (depending on quality)	10+ years (with proper use)
Warranty	1–6 months	1–2 years (at official dealers)
Working hours	2–4 hours	3–5 hours

Repair is justified in the following cases:

• 🔧 Small cracks (up to 2 cm) - welded using argon welding or sealed with a special sealant (for example, Loctite 577).
• 🛠️ Early stage corrosion — sandblasting and applying an anti-corrosion coating (for example, Dinitrol).
• 🔩 Problems with the level sensor — replacing the float or cleaning the contacts (costs ~1 thousand rubles).

Replacement is necessary if:

• 💥 The tank is deformed after an accident or a strong blow.
• 🔥 There are through holes or multiple cracks.
• 🕳️ A lot of rust or sediment has accumulated inside the tank (cleaning will not help).

Cleaning the gas tank Almera Classic: when and how to do it

Cleaning your gas tank is a preventative procedure that is often ignored until fuel system problems arise. B Almera Classic the accumulation of sediment and rust inside the tank begins after 100–150 thousand kilometers, especially if you refuel at dubious gas stations. Main signs of a clogged tank:

• 🛢️ Lights up CHECK ENGINE with an error P0171 (lean mixture).
• 🚗 The car twitches when accelerating or idling.
• ⛽ The fuel pump hums louder than usual (works with overload).

For cleaning you will need:

1. Remove the tank (as described above).
2. Drain remaining fuel and rinse tank kerosene or special cleaner (For example, Liqui Moly Tank Reiniger).
3. Remove rust with a brush or sandblast (if any).
4. Blow out the tank with compressed air and dry it.
5. Replace the fuel pump mesh (part number 17040-9M000).

The cost of professional cleaning at the service is ~2–4 thousand rubles. You can do this yourself for 500–1000 rubles. (price of the cleaner + new clamps). Important: do not use water for rinsing - it may remain in the tank and cause corrosion!

How to protect a gas tank from corrosion and extend its life

Corrosion is a major problem with steel gas tanks, including Almera Classic. To avoid costly repairs, follow these simple rules:

• 🛢️ Refuel at trusted gas stations. Gasoline with a high sulfur content accelerates the oxidation of the metal. Give preference to fuel Euro 5 or Euro 6.
• 🚗 Don't leave the tank empty for a long time. Condensation that forms in an empty tank causes rust. It is optimal to keep the fuel level above 1/4.
• 🔧 Add additives periodically against corrosion (eg Wynn's Tank Cleaner). Once every 10 thousand km is enough.
• 🛠️ Check the condition of the tank at every maintenance (especially after winter). Pay attention to rust around the neck.

If the tank has already begun to rust, you can use anti-corrosion coatings for internal processing. For example, a remedy Kreem forms a protective film on the metal. The procedure takes ~1 hour and costs 1–2 thousand rubles. (depending on the product).

Another life hack - installation of magnetic traps into the fuel system. They collect metal particles, preventing rust from entering the fuel pump and injectors. The cost of such a filter is ~500 rubles, and the service life is up to 50 thousand km.

⚠️ Attention: If swelling or paint bubbles appear on the tank, this is a sign internal corrosion. In this case, cleaning or anti-corrosion will not help: the tank needs to be replaced, since the metal has already lost its strength.

FAQ: Frequently asked questions about the gas tank Nissan Almera Classic

Is it possible to drive with a crack in the gas tank if it does not leak?

No, this is extremely dangerous! Even a microcrack can lead to the leakage of gasoline vapors, which are ignited by a spark. In addition, the crack will expand over time due to vibrations. If you notice damage, repair or replace the tank immediately.

How many liters actually fit into the tank? Almera Classic?

According to the passport - 50 liters, but in practice, after the gun’s cut-off is activated at a gas station, 48–52 liters are placed in the tank. This depends on the design of the neck and the angle of the vehicle. Some owners manage to fill up to 55 liters, but this is risky - it can damage the tank ventilation system.

Which fuel pump is suitable for Almera Classic?

Original pump part number: 17040-9M000. Analogues: Bosch 0 580 454 035, Denso 950-0101 or AIRTEX E2319M. When replacing, it is also recommended to change the filter mesh (included with the pump) and check the condition of the fuel pipes.

What should I do if the car does not start after refueling?

This may be due to airing of the fuel system (for example, if the tube is disconnected during refueling) or activation of the tank ventilation valve. Try:

1. Turn the starter 2-3 times for 5 seconds (without pressing the gas).
2. If that doesn't help, inspect the fuel pipes for leaks.
3. As a last resort, relieve pressure in the system by pressing the fuel rail nipple (under the hood).

If the problem persists, diagnose the fuel pump and pressure sensor.

Is it possible to install a gas tank from another model? Nissan?

Theoretically, tanks from Nissan Almera N16 (article 17700-4M500), but some improvements will be required:

• Fitment of fasteners (holes may not match).
• Replacement of fuel pipes (different diameters of fittings).
• Moving the level sensor (different connectors).

It’s better not to experiment - an original tank or a high-quality analogue will cost less than alterations.