Resonator <em>Nissan Almera G15</em>: how to choose and replace correctly?

Resonator in the exhaust system Nissan Almera G15 - this is not just a “can”, but a critical element that affects sound, dynamics and even fuel consumption. Many owners are faced with the problem of corrosion or mechanical damage after 80-100 thousand kilometers, especially in Russian winter conditions. But how to choose the right part according to the article number, not run into a fake and avoid mistakes when replacing?

In this article we will look at original resonator articles for Almera G15 (including restyled versions), compare them with popular analogues from Bosal, Walker And Magneti Marelli, and we will also give step-by-step instructions for replacement, taking into account the nuances of fastening. We will pay special attention typical problems after installing non-original parts - from rattling to loss of power.

Original articles of resonators for Nissan Almera G15

For Nissan Almera G15 (2012–2019) original resonators are supplied under two main article numbers depending on the year of manufacture and configuration:

• 🔧 20520-4M00A — for models up to 2015 (without a catalyst in the resonator).
• 🔧 20520-4M01A - for restyled versions (2015–2019), often with an integrated catalytic converter.
• 🔧 20520-JD00A - an alternative option for markets with strict environmental standards (Euro-5).

Important: Article numbers may vary depending on engine volume (1.5 or 1.6 l) and gearbox type. For example, for the version with CVT sometimes a modified resonator with additional mounting is used.

Be sure to check with VIN code car or use online catalogs like Nissan EPC. An error in choosing an article can lead to a mismatch of seats or pipe diameters.

Analogs of resonators: what to choose instead of the original?

Original parts from Nissan often criticized for the high price (from 8,000 to 15,000 rubles). An alternative is analogues from trusted manufacturers, which are sometimes not inferior in quality, but cost 2-3 times cheaper.

Manufacturer	Article	Price, ₽	Features
Bosal	264-144	4 200–5 500	Stainless steel, good sound insulation, but may require modification of fastenings.
Walker	20595	5 000–6 300	Galvanized steel, fully compatible with the original, but weighs 10–15% more.
Magneti Marelli	191500350000	6 500–7 800	High quality welding, but there are fakes (check the hologram).
Eberspächer	93456200	7 200–8 500	Premium segment, stainless steel with anti-corrosion coating.

⚠️ Attention: When choosing an analogue, pay attention to inlet/outlet pipe diameter (should be 45–50 mm) and resonator length (original - 480–520 mm). Cheap Chinese analogues (for example, Febi or Meyle) often have thin walls (1–1.2 mm instead of 1.5 mm), which leads to burnout after 1–2 years.

When is it time to change the resonator: 5 obvious signs

Resonator on Almera G15 rarely fails suddenly - usually the problem accumulates gradually. Here are the key symptoms that should not be ignored:

• 🔊 Increased hum or rattling noise during acceleration (especially at speeds of 2,500–3,000 rpm).
• 💨 The appearance of condensation or rust on the resonator body (visible upon visual inspection).
• 🚗 Vibrations in the cabintransmitted through the body when driving over uneven surfaces.
• 🛑 Power drop (the engine stalls when overtaking) due to obstruction of the exhaust gases.
• 🌫️ Smoke or sparks from under the bottom (a critical sign - requires an immediate stop!).

Resonator service life at Almera G15 depends on driving style and operating conditions:

• 🌆 City mode (short trips, frequent warm-ups) - 3–4 years.
• 🛣️ Route (long trips at high speeds) - 5–6 years.
• ❄️ Extreme conditions (salt, reagents, off-road) - 2–3 years.

Step-by-step instructions for replacing the resonator

Replacing the resonator with Nissan Almera G15 does not require special equipment, but will require an inspection hole or a lift. Average operating time is 1.5–2 hours.

Socket set (10, 12, 14 mm)|WD-40 or equivalent|New resonator with gaskets|Exhaust sealant (eg. Abro ES-332)|Jack and stops (if there is no hole)|Gloves and safety glasses-->

Step 1. Preparation

Drive the car into the pit, lock the handbrake and place chocks under the wheels. Treat all resonator mounting bolts WD-40 10-15 minutes before starting work - this will make unscrewing easier.

Step 2. Dismantling the old resonator

Unscrew the bolts securing the resonator to the exhaust pipe and muffler (usually 2-3 bolts on each side). If the bolts are stuck, use a gas wrench or heat them with a hair dryer. Carefully remove the resonator, being careful not to damage adjacent elements (for example, the fuel tank).

Step 3. Installing a new resonator

Before installation, check the integrity of the gaskets (replace if necessary). Apply a thin layer of sealant to the connections to prevent air leaks. Secure the resonator starting from the exhaust pipe, then connect it to the muffler. Tighten the bolts crosswise with a force of 25–30 Nm.

Step 4. Check

Start the engine and check:

• 🔧 No exhaust gas leaks at connections.
• 🔊 No rattling or extraneous noise.
• 🚗 Smooth running (no jerking during acceleration).

⚠️ Attention: If after replacement there is metallic ringing When driving, most likely the resonator touches the body or suspension. Check the gaps and, if necessary, adjust the position using new rubber hangers.

Typical mistakes when replacing a resonator and how to avoid them

Even experienced car owners make mistakes that later lead to repeated work. Here are the most common:

1. Ignoring gaskets. Old gaskets often lose their elasticity, which leads to air leaks. Always install new ones (part number of original ones - 20680-4M000).
2. Bolt tightening. Excessive force deforms the flanges, which later causes cracks. Use a torque wrench.
3. Saving on sealant. Cheap sealants (for example, silicone) do not withstand high temperatures. Take specialized compounds for exhaust systems.
4. Particulate filter mismatch. If your Almera G15 equipped with a diesel particulate filter (DPF), the resonator must be compatible with it. Otherwise an error will occur P242F.

What happens if you drive with a burnt-out resonator?

In addition to discomfort from noise, a burnt-out resonator leads to:

1) Exhaust gases entering the cabin (risk of CO poisoning).

2) Overheating of the catalyst (may melt).

3) An increase in fuel consumption by 5–10% due to a violation of back pressure.

4) Possible failure of the oxygen sensor (error P0420).

How to extend the life of a resonator: prevention and care

The service life of the resonator can be increased by 30–50% if you follow simple recommendations:

• 🛠️ Regular underbody washing (especially in winter). Use special salt removers, e.g. Liqui Moly Unterboden-Schutz.
• 🔥 Avoid short trips. Frequent cold starts promote the formation of condensation, which accelerates corrosion.
• 🚿 Anti-corrosion treatment. Once every 2 years, apply heat-resistant mastic to the resonator (for example, Dinitrol 479).
• 🛣️ Suspension condition monitoring. Worn rubber suspensions of the resonator lead to its friction against the body.

⚠️ Attention: Do not use for resonator processing bitumen mastic - it melts at high temperatures and can clog perforations, worsening sound and gas flow.

If you often drive off-road, install additional protection on the resonator (for example, a metal shield from 4x4 Store). This will protect it from being hit by stones and branches.

FAQ: Frequently asked questions about resonators Nissan Almera G15

Is it possible to drive without a resonator?

Technically yes, but this will lead to:

• Increased noise (up to 90–100 dB, which exceeds GOST standards).
• Risk of catalyst damage due to increased back pressure.
• Possible problems during inspection.

A temporary solution is to install a “direct flow” (for example, from Fox), but this will reduce engine life.

How to distinguish an original resonator from a fake?

Original parts from Nissan have:

• Laser engraving of the article number on the case (not a sticker!).
• Smooth welding seams without beads.
• Complete with gaskets and bolts in original packaging.

Counterfeits are often 20-30% lighter due to the thin metal.

How much does it cost to replace a resonator in a service?

Cost of work in Moscow and regions (2026):

• Replacing the resonator - 1 500–2 500 ₽.
• Replacing the resonator + exhaust pipe — 3 000–4 500 ₽.
• Welding work (when repairing an old resonator) - 2 000–3 500 ₽.

In official dealerships prices are 30–50% higher.

Does the resonator affect fuel consumption?

Yes, but indirectly. Burnt out or clogged resonator:

• Increases back pressure in the system, forcing the engine to work with increased load (+0.5–1 l/100 km).
• It can cause lambda probe errors that put the engine into emergency mode (consumption increases by 10–15%).

After replacing the resonator, the flow rate usually normalizes within 1–2 refills.

Is it possible to install a resonator from another Nissan model?

It is theoretically possible to install resonators from:

• Nissan Note (article 20520-JD01A) — requires modification of the fastenings.
• Nissan Tiida (article 20520-BM00A) - only suitable for versions with a 1.6-liter engine.

However, this will require welding and may unbalance the exhaust system. We recommend sticking to the original articles.