Exhaust system Nissan Note E11: design, diagnostics and repair

Nissan Note E11 - a compact hatchback that has gained popularity due to its efficiency and reliability. However, even with such cars, the exhaust system requires attention over time. Not only environmental friendliness, but also engine dynamics, fuel consumption, and in some cases, operational safety depend on its condition.

In this article we will analyze the design of the exhaust system Nissan Note E11 (body E11, 2006–2013), typical faults associated with corrosion, burnout or clogged catalyst, as well as the nuances of choosing spare parts and repairs. We will place special emphasis on diagnostics without specialized equipment and budget solutions for owners.

Nissan Note E11 exhaust system: diagram and components

Exhaust system Nissan Note E11 classic for cars with gasoline engines HR15DE (1.5 l) and HR16DE (1.6 l). It consists of several key nodes, each of which performs its own function:

• 🔥 Exhaust manifold — removes hot gases from the engine cylinders. On Note E11 often integrated with the catalytic converter (catalyst).
• 🛡️ Reception pipe (spider) — connects the collector to the resonator. In some modifications it is equipped with a flexible corrugation to compensate for vibrations.
• 🔇 Resonator (pre-silencer) — reduces noise and evens out the flow of exhaust gases.
• 🚗 Main muffler — finally suppresses sound and directs gases into the atmosphere. On Note E11 often suffers from corrosion.
• 🔄 Oxygen sensors (lambda probes) - control the composition of the mixture. On E11 there are two of them: upper (before the catalyst) and lower (after).

Features of the system: compact layout due to the short wheelbase of the hatchback. This simplifies access to most elements, but accelerates wear due to the proximity to road reagents.

Component	Material	Typical resource, km	Symptoms of a problem
Catcollector	Stainless steel	150 000–200 000	Cracks, power loss, error P0420
Receiving pipe corrugation	Laminated steel	80 000–120 000	Burnout, knocking noise when driving
Main muffler	Aluminized steel	100 000–150 000	Corrosion, increased noise
Lambda probes	Ceramic/platinum	100 000–150 000	Errors P0130–P0167, increased consumption

On vehicles with an engine HR16DE (109 hp) the catalyst is integrated into the manifold, which complicates its replacement. While on HR15DE (106 hp) it is carried out separately - it is cheaper to repair.

Typical malfunctions: signs and causes

Exhaust system Nissan Note E11 most often suffers from three problems: corrosion, burnout And clogged catalyst. Let's look at each in more detail.

1. Corrosion of muffler and pipes

The main reason is aggressive environment (salt, moisture, reagents) and condensate, accumulating inside the system. On Note E11 Most often they rust:

• 🔴 Welded seams of the main muffler.
• 🔴 Receiving pipe at the point of attachment to the collector.
• 🔴 Suspension brackets (pillows).

Signs: holes in metal, rust stains under the car, increased noise at idle speed.

2. Burnout of corrugation or collector

The corrugation (flexible connection) burns out due to constant vibrations And high temperatures. On Note E11 this shows up:

• 🔊 Metallic knock when accelerating or braking.
• 🔥 Black traces of soot around the corrugations.
• ⚠️ Error P0420 (low catalyst efficiency).

The manifold burns out less often, but if this happens, the engine loses power and the smell of exhaust fumes appears in the cabin.

⚠️ Attention: Burnt-out corrugation can lead to depressurization of the system and the entry of exhaust gases into the cabin through the ventilation. This is a danger of carbon monoxide poisoning!

3. Clogged catalyst

Catalytic converter on Note E11 clogs due to:

• 🛢️ Low quality fuel (additives destroy honeycombs).
• 🔧 Faulty spark plugs or armored wires (unburned fuel burns out in the catalyst).
• 💨 Oil zhora (oil clogs the honeycomb with soot).

Signs: power drop (especially at rpm above 3000), difficult start, errors P0420 or P0430.

What happens if you drive with a clogged catalyst?

Driving for a long time with a clogged catalyst leads to:

- Engine overheating (exhaust gases are not removed efficiently).

- Increased load on the piston group (risk of ring sticking).

- Complete destruction of the catalyst and the entry of its particles into the cylinders (engine overhaul).

Exhaust system diagnostics without equipment

Professional diagnostics require a gas analyzer and an error scanner, but 80% of malfunctions exhaust system Nissan Note E11 can be identified independently. Here is a step-by-step algorithm:

1. Visual inspection. Stop the engine and inspect the system for:
   • 🔍 rust holes (especially in the muffler and welds).
   • 🔍 Soot or oil stains (indicate burnout).
   • 🔍 Cracks in the corrugation (check by tugging the pipe with your hand).
2. Checking for leaks. Start the engine and close the exhaust pipe with your hand (for 1-2 seconds!). If you feel strong pressure — the system is sealed. If the pressure is weak, there is a leak.
3. Back pressure test. At idle, press the gas hard to 3000–4000 rpm. If the engine “chokes” and does not pick up speed, the catalyst is clogged.
4. Listening. Raise the car on a lift or ramp and listen to:
   • 🔊 Hissing - gas leakage through a crack.
   • 🔊 Thud - burnt corrugation or weakened cushions.
   • 🔊 Sound of metal — destroyed internal muffler partitions.

To check lambda probes you can use multimeter (measure the voltage at the sensor connector) or scanner ELM327 (view parameters Bank 1 Sensor 1/2 in real time).

Selection of spare parts: original vs analogues

When replacing exhaust system elements Nissan Note E11 owners are faced with a choice: original parts (expensive but reliable) or analogues (cheaper, but of different quality). Let's consider options for key nodes:

Detail	Original art.	Price, ₽	Recommended analogues	Notes
Main muffler	20520-4M00A	12 000–15 000	Bosal (212-627), Walker (20947)	Analogues last 2-3 years, original - 5+ years
Receiving pipe corrugation	20510-4M000	8 000–10 000	HJS (30.01.0526), Eberspächer (713555)	It is better to take with reinforced weaving
Catcollector (HR16DE)	20500-4M01A	45 000–60 000	Magnetti Marelli (194900190000), Denso (534-4206)	When replacing, be sure to update the gaskets
Lambda probe (upper)	22690-4M000	5 000–7 000	NGK (NTK 25177), Denso (DOX-0109)	The lower sensor can be installed universally

When choosing analogues, pay attention to:

• 🔧 Material — stainless steel is preferable to aluminized steel.
• 📏 Metal thickness — thin-walled parts burn out faster.
• 🔄 Availability of guarantee - good brands (Bosal, Walker) give 2–3 years.

⚠️ Attention: When purchasing a catenary collector, check whether it comes with exhaust manifold gasket (art. 14035-4M000). Its absence will lead to air leaks and an error. P0171 (lean mixture).

To save money you can consider used original parts from disassembly, but only if they are in perfect condition (no rust or dents).

Exhaust system repair: step-by-step instructions

Many exhaust system repairs Nissan Note E11 can be done independently if available jack, set of keys And welding machine (for serious damage). Let's look at typical scenarios.

1. Replacing the corrugation of the exhaust pipe

The corrugation can be changed without removing the entire system. Procedure:

1. Jack up the car and remove heat shield (4 bolts per 10).
2. Unscrew two nuts attaching the corrugation to the collector and resonator (key 14).
3. Remove the old corrugation, clean the flanges from rust wire brush.
4. Install a new corrugation, tighten the nuts torque wrench (torque 40–50 Nm).

If the corrugation is welded (on some modifications), it is cut off with a grinder and a new one is welded.

2. Elimination of cracks in the muffler

Small cracks or holes can be repaired without replacing the entire muffler:

• 🔧 Clean the surface sandpaper to pure metal.
• 🔧 Apply heat resistant sealant (For example, Abro ES-332 or Permatex Muffler Cement).
• 🔧 For larger holes use brass patch And argon welding.

Such repairs will extend the life of the muffler by 1–2 years, but will not replace a full replacement.

3. Replacing the lambda probe

Lambda probes on Note E11 change in 15–20 minutes:

1. Disable sensor connector (press the latch).
2. Using a 22mm wrench, unscrew the sensor (pre-treat WD-40, if you're stuck).
3. Install a new sensor, without over-tightening (torque 30–40 Nm).
4. Connect the connector and reset the error using the scanner.

⚠️ Attention: After replacing the lambda probe, the engine may run unstable first 50–100 km - this is normal, as the ECU adapts to the new sensor.

Prevention: how to extend the life of the exhaust system

Exhaust system life Nissan Note E11 can be increased by 1.5–2 timesif you follow simple recommendations:

• 🚗 Avoid short trips — condensate does not have time to evaporate, accelerating corrosion.
• 🛣️ Wash the bottom in winter - salt and reagents destroy metal in 2-3 seasons.
• ⛽ Refuel at trusted gas stations - bad fuel kills the catalyst.
• 🔧 Check spark plugs and armor wires — malfunctions lead to burning out of fuel in the exhaust.
• 💨 Control oil consumption — oil in the exhaust clogs the catalyst honeycomb.

Once every 50,000 km useful:

• 🔍 Inspect the system on a lift.
• 🔧 Tighten clamps and fastenings.
• 🧹 Clean the drainage holes of the muffler (if any).

Can be used for corrosion protection anti-corrosion compounds (For example, Dinitrol 479 or Tectyl ML), but they need to be applied to clean and dry metal

Common repair mistakes and how to avoid them

Even experienced car owners make mistakes when repairing the exhaust system. Nissan Note E11. Here are the most common:

1. Use of non-heat-resistant sealants.

   Conventional sealants (for example, silicone) do not withstand exhaust gas temperatures and quickly burn out. Use only special compounds for exhaust systems (withstands up to 1000°C).

2. Tightening the fastening nuts.

   Excessive tightening force will result in flange deformations or thread breakage. Always use a torque wrench!

3. Ignoring gaskets.

   When replacing the cathode collector or exhaust pipe, many people forget to change gaskets (art. 14035-4M000), which leads to air leaks and lambda errors.

4. Welding without protecting adjacent elements.

   When welding, the corrugations or muffler are not closed plastic parts (for example, a bumper or fuel pipes), which leads to their melting.

5. Installation of a universal catalyst without modifications.

   Cheap universal catalysts often do not match the original in size, which leads to narrowing of the flow area and loss of power.

Another common mistake is purchasing a muffler without internal partitions. Such parts are cheaper, but will last a maximum of a year, since they do not dampen vibrations and quickly burn out.

FAQ: Frequently asked questions about the Nissan Note E11 exhaust system

Is it possible to drive with a burnt corrugation?

Short-term - yes, but it is fraught with:

• 🔊 Increased noise (may interfere with the diagnosis of other faults).
• ⚠️ Exhaust gases entering the cabin through ventilation.
• 🚗 Deterioration of dynamics due to air leaks.

It is recommended to replace the corrugation within 1–2 weeks after detection of burnout.

Which catalyst is better to install on the Note E11: original or universal?

Depends on budget and goals:

• Original (20500-4M01A) - expensive (45,000–60,000 rubles), but will last 150,000+ km.
• Universal (For example, Magnetti Marelli) - cheaper (20,000–30,000 rubles), but may require modifications to the landing.
• Flame arrestor - a budget option (5,000–10,000 ₽), but does not meet eco-standards (may not pass technical inspection).

For the city, the original or a high-quality analogue is better. For the highway (if environmental friendliness is not important) - flame arrester + lambda decoy.

Why did the Check Engine light come on after replacing the lambda probe?

Probable reasons:

• 🔌 Unconnected connector — check the connection.
• 🔧 Unreset errors — a scanner reset is required.
• 🚗 Incompatible sensor — even if the connector fits, the parameters may not match.
• 🛠️ Air leak — check the gaskets and clamps.

If the error does not clear, check sensor voltage multimeter (should be 0.1–0.9 V at idle).

How to check if the catalyst is clogged without removing it?

Diagnostic methods:

1. Back pressure test - Accelerate sharply to 4000 rpm. If the engine chokes, the catalyst is clogged.
2. Vacuum test — Connect a vacuum gauge to the intake manifold. If the catalyst is clogged, the vacuum at idle will be below 50 kPa.
3. Error Scanner - codes P0420 or P0430 often indicate a catalyst.
4. Tactile method — tap the catalyst with a wooden stick. A dull sound means the honeycombs are intact, a loud sound means they are destroyed.

Is it possible to remove the catalyst on Note E11 and what is needed for this?

Technically possible, but you will need:

• 🔧 Install flame arrester instead of a catalyst.
• 📶 Flash the ECU under Euro-2 or put lambda probe decoy.
• 🚗 Prepare for the fact that the car will not pass inspection (if you do not legalize the changes).

Cost of work: 15,000–25,000 ₽ (including firmware). The fuel savings will be ~5%, but the dynamics will improve more noticeably.