<em>Nissan Almera Classic</em> rear brake pipes: how to choose, replace and avoid mistakes

Why rear brake pipes Almera Classic require special attention

Brake system Nissan Almera Classic (body B10, 1995–2006) is one of the most vulnerable components when operating in Russian conditions. If the front brake hoses are replaced more often due to mechanical damage, then rear tubes suffer from corrosion, internal deposits and metal fatigue. Moreover, the problem is relevant both for versions with drums brakes (1.4/1.6), and for disc modifications (1.8/2.0).

Unlike flexible hoses, metal tubes have no external signs of wear until critical damage occurs. And the consequences of their rupture range from complete failure of the brakes to jamming of the wheels at speed. For example, on Almera Classic with ABS a broken tube between the master cylinder and the pressure regulator causes the lamp to activate BRAKE And ABS, but the brakes can remain functional - for the time being.

In this article we will look at:

• 🔍 How to diagnose faulty rear tubes without a lift
• 🛠️ Step by step replacement taking into account the specifics Almera Classic
• 📦 Articles and analogues original pipes (including rare variants)
• ⚠️ Common mistakes, which lead to repeated repairs after 1–2 years

Signs of a malfunction: when to change tubes and when bleeding is enough

The first symptom of problems with the rear tubes is soft brake pedal with increased stroke. But the same symptoms occur when the pads wear out or air gets into the system. To identify faulty tubes, pay attention to:

• 💧 Brake fluid leaks on the inside of the rear wheels or under the car (on the axle side). On Almera Classic often leaks at the junction of the tubes with working cylinders or in the area of attachment to the body.
• 🔧 Rust on threaded connections. If the tube nuts are covered with a red coating, replacing them is a matter of time.
• ⚠️ Uneven braking (the car pulls to the side) when you press the pedal. This may indicate air leaks through microcracks.
• 🚨 Lamp lights up BRAKE when the fluid level sensor and the master cylinder are in full working order.

Critical sign - sudden drop in fluid level in the tank no visible leaks under the hood. On Almera Classic the rear pipes run under the bottom along the side members, and the leak may be hidden by dirt. You can check this shaking the car by the back: If after this, drops of liquid appear under the wheels, the tubes require urgent replacement.

⚠️ Attention: If on Almera Classic with ABS After replacing the tubes, the malfunction lamp came on, do not rush to reset the error with the scanner. First bleed the system manually (even if a vacuum pump was used) - air often remains in the circuit due to the location of the valves ABS.

Diagrams and articles: which tubes are suitable for Almera Classic B10

On Nissan Almera Classic Rear brake pipes differ depending on:

• 🔹 Brake type: drum (1.4/1.6) or disc (1.8/2.0).
• 🔹 Availability of ABS: tubes for cars with anti-lock braking systems have additional branches.
• 🔹 Year of manufacture: before and after 2000 - different catalog numbers.

Below is a table with original articles and proven analogues:

Brake type	Original article	Analogs (brand + article)	Notes
Drum (without ABS)	40520-4M000 (left) 40521-4M000 (right)	ATE: 24.3202-0136.2 TRW: PFH444	Fits 1995-1999 models.
Drum (with ABS)	40520-4M010 (set)	Fenox: TB33001O7 Pilenga: PTB-012	Tubes with ABS sensors included
Disc (1.8/2.0, without ABS)	40520-4M100 (left) 40521-4M100 (right)	ATE: 24.3203-0136.2 Textar: 2546201	Tubes are 120 mm longer
Disc (with ABS)	40520-4M110 (set)	TRW: PFH445 Brembo: L 08.444	ABS adaptation required after replacement

Important: On Almera Classic 2000–2006 with disc brakes, the rear tubes have reinforced fittings (marking M10x1.0 instead of M10x1.25). Installing old pipes on new models will lead to leaks after 5–10 thousand km.

When choosing analogues, pay attention to:

• 🔧 Tube material: optimal - copper-nickel (ATE, TRW) or stainless steel (Brembo). Budget galvanized options last no more than 2–3 years.
• 📏 Length and shape: Drum brake tubes are shorter and have a 45° bend, while disc brake tubes have a 90° bend.
• 🔄 Completeness: original Nissan kits come with new ones copper o-rings, which are often absent from cheap analogues.

Step-by-step replacement of rear brake pipes: tools and nuances

To replace tubes with Almera Classic you will need:

• 🔧 Set of open-end wrenches (10 mm, 11 mm, 14 mm).
• 🔨 Pipe wrench (adjustable) for loosening soured nuts.
• 🧲 Magnet on the telescopic handle (so as not to lose the nuts in the arches).
• 🧴 Penetrating lubricant (For example, WD-40 Specialist or Liqui Moly Rostloser).
• 🩹 Brake fluid (DOT-4) and bleeder hose.

Replacement algorithm:

1. Drain the brake fluid from the rear circuit (unscrew the fitting on the working cylinder).
2. Clean threaded connections wire brush and apply lubricant. On Almera Classic nuts often stick to the tubes - do not try to unscrew them without pre-treatment!
3. Disconnect the tubes from:
   • 🔹 Brake master cylinder (under the hood).
   • 🔹 Pressure regulator (on the side member on the right).
   • 🔹 Working cylinders or calipers (depending on the type of brakes).

Install new tubesstarting from the master cylinder. Do not overtighten the nuts - tightening torque 16–20 Nm.

Bleed the system ok: right rear → left rear → right front → left front.

The fittings on the working cylinders have been cleaned|The fluid level in the tank has been checked|The hose and container for draining have been prepared|The assistant is ready to press the pedal on command-->

Features for Almera Classic with ABS:

• 🔧 After replacing tubes be sure to clear errors scanner (for example, Launch CReader).
• 🔄 If the lamp ABS continues to burn, bleed the system ABS mode (diagnostic equipment required).
• ⚠️ Do not use liquid DOT-5 - it is incompatible with rubber seals Almera Classic.

⚠️ Attention: On 1995–1998 models. tubes are attached to the body plastic clips, which break during dismantling. Buy new ones in advance (item number 01534-4M000) or use zip ties.

Typical replacement mistakes: what shortens the service life of tubes

Even when using high-quality tubes, they may fail after 1-2 years due to installation errors. Common mistakes:

• 🔧 Retightening the nuts. On Almera Classic this leads to deformation of the copper seals and leaks. The optimal moment is 16–18 Nm.
• 🧴 Using sealant on the thread. It clogs the tube channels and causes corrosion.
• 🔄 Incorrect pumping order. If you start with the front wheels, the air will remain in the rear circuit.
• 🚗 Ignoring pressure regulator. On Almera Classic it often sours and needs to be cleaned before replacing the tubes.

Another critical error - installation of tubes without vibration protection. On Almera Classic the rear pipes run next to the exhaust system and are wrapped by experienced craftsmen asbestos tape or heat shrink tube at points of contact with the body.

What happens if you don't bleed the brakes after replacing the pipes?

If there is air left in the system, the brake pedal will be “wobbly” and the braking distance will increase by 30–50%. At speeds above 80 km/h this can lead to loss of vehicle control, especially on wet roads. In addition, air in the circuit accelerates corrosion of metal tubes from the inside.

How to extend the life of new tubes:

• 🧹 Flush the system every 2 years (or when replacing the fluid).
• 🛡️ Machine threads anti-corrosion composition (Liqui Moly Kupfer-Spray).
• 🔍 Check the fastenings tubes to the body once every six months - they must be firmly fixed, but without tension.

Is it worth repairing old tubes: soldering vs replacement

Some owners Almera Classic are trying solder damaged tubes instead of replacement. This is a temporary solution that is justified only in two cases:

1. The crack is located in middle of the tube (not at fittings).
2. Soldering in progress argon using solder based silver (For example, Castolin 192).

Why soldering is a bad idea 90% of the time:

• 🔥 Heat weakens metal. The tube will lose strength and burst somewhere else.
• 🧪 Scale will remain inside, which will clog the valves ABS.
• ⏳ Service life for a repaired tube – no more than 6–12 months.

If you still decide to solder, follow the rules:

1. Clean the soldering area until it shines (sandpaper P800).
2. Use flux for copper (For example, F-SW21).
3. After soldering blow out the tube with compressed airto remove scale.

⚠️ Attention: On Almera Classic with ABS Soldering tubes is strictly not recommended - even microparticles of solder can damage the anti-lock braking system control unit.

FAQ: Frequently asked questions about rear brake pipes Nissan Almera Classic

Is it possible to install tubes from Nissan Sunny or Primera on Almera Classic?

Partially. Tubes from Sunny N14 (1990–1998) suitable for Almera Classic with drum brakes, but have a different length of mounting clamps. For disk versions Almera tubes from Primera P10 incompatible due to different fitting diameter (M10x1.25 vs M10x1.0).

How often should rear brake lines be replaced?

On Almera Classic recommended interval - every 4–5 years or during mileage 80–100 thousand km. In regions with salty winters or high humidity - once every 3 years. Focus on the condition: if the tubes show blistered rust (bubbles under the paint), replace them immediately.

What should I do if, after replacing the tubes, the brake pedal becomes stiff?

Causes and solutions:

• 🔧 Airing the system — Pump the brakes again.
• 🔄 Faulty pressure regulator - check its operation (on Almera Classic it often jams after replacing tubes).
• 🚗 Deformed tubes — if they were bent during installation, replace them with new ones.

What brake fluid should I fill after replacing the pipes?

For Almera Classic all years of manufacture - DOT-4 (For example, Castrol React DOT4 or Motul DOT 5.1). System volume - 0.5–0.7 l. Do not use DOT-5 (silicone base is incompatible with rubber seals) and DOT-3 (low boiling point).

Is it possible to drive if the rear brake pipe is leaking?

Absolutely not. Even with a small leak:

• 🚨 The braking distance increases by 2-3 times.
• 🔥 Risk of rear wheels jamming due to air getting into the system.
• 💥 When braking sharply, the car may turn around.

If a leak is found along the way, tow the car or drive at a speed no higher than 40 km/h, avoiding braking (use the engine).