Muffler for Nissan Cefiro A32: selection, replacement and modernization

Nissan Cefiro A32 - a legendary business class sedan, released in 1994, which is still in demand due to its reliability and comfort. However, even such time-tested cars have weak points, and one of them is output system. Muffler on Cefiro A32 subject to corrosion, mechanical damage and natural wear, especially if the machine is operated in aggressive conditions. In this article, we'll look at how to choose the right muffler, when to change it, and what tuning options are available to improve sound and performance.

Owners Cefiro A32 are often faced with the problem of choosing between original spare parts, analogues from Bosal or Walker, and budget options from little-known brands. We analyzed the market, car owner reviews and technical specifications to help you make an informed choice. You will also find step-by-step instructions for replacing the muffler with your own hands, taking into account the design nuances A32 and typical mistakes that beginners make.

Signs of a muffler malfunction on a Nissan Cefiro A32

The first symptoms of muffler problems are often ignored until they develop into serious problems. On Cefiro A32 most common signs:

• 🔊 Increased noise from under the bottom - especially noticeable at idle or during acceleration. If the sound becomes sharp and “metallic”, this is a signal of breakdown or corrosion of the internal partitions.
• 💨 Foreign odors in the cabin - penetration of exhaust gases through cracks in the muffler or corrugation. Hazardous to health as carbon monoxide (CO) is colorless and odorless!
• 🔥 Black soot at the end of the exhaust pipe - indicates incomplete combustion of fuel, which may be due to a clogged catalyst or damaged resonator.
• 🚗 Vibrations when driving - often occur due to loose fastenings or destruction of the muffler hangers.

Particular attention should be paid muffler corrugation - on Cefiro A32 it often burns out due to high temperatures and vibrations. If you ignore cracks in the corrugation, this can lead to depressurization of the entire system and gases entering the cabin. You can check its condition visually or using smoke test (supplying smoke into the exhaust system under pressure).

⚠️ Attention: If, after starting the engine, there is white smoke (not to be confused with steam in cold weather), this may indicate coolant getting into the combustion chambers. In this case, the problem lies not in the muffler, but in broken cylinder head gasket or a crack in the cylinder block.

Original vs analogues: what to choose for Cefiro A32?

When replacing the muffler with Nissan Cefiro A32 owners are faced with a dilemma: to buy original spare part (article 20620-40X00 or 20620-40X01 for models with a catalyst) or equivalent. The original guarantees a perfect fit and durability, but its price can reach 15,000–20,000 rubles (for 2026). Alternative options are cheaper, but not all of them are of the same quality.

Brand	Article	Price (RUB)	Features	Service life
Nissan (original)	20620-40X00	18 000–22 000	Perfect compatibility, stainless steel	5–7 years
Bosal	099-1018	8 000–10 000	Good quality, aluminized steel	3–5 years
Walker	20624	7 500–9 500	Reinforced corrugation, moderate sound	4–6 years
Eberspächer	934562	12 000–14 000	Premium quality, stainless steel	6–8 years
Budget analogues (For example, ASAMI)	VARIES	3 000–5 000	Thin metal, short service life	1–2 years

When choosing an analogue, pay attention to:

• 🔧 Material: Stainless steel will last longer than aluminized steel, but it also costs more.
• 📏 Metal thickness: optimal - 1.2–1.5 mm. Budget options are often made of metal 0.8–1 mm thick, which quickly burns out.
• 🔊 Noise level: some analogues (for example, Remus or Sprint) offer a "sporty" sound, but this may cause problems when passing inspection.

⚠️ Attention: On Cefiro A32 with engines VQ20DE And VQ25DE The muffler has a unique form of attachment to the resonator. Some cheap analogues may not fit the geometry, which will lead to vibrations or the inability to secure the system.

Step-by-step replacement of muffler on Nissan Cefiro A32

Replacing the muffler with Cefiro A32 You can do it yourself if you have an inspection hole or a lift. On average, the procedure takes 1.5–2 hours. You will need:

• 🔧 Set of sockets and keys (10, 12, 14 mm).
• 🔨 WD-40 or similar penetrating lubricant.
• 🔥 Gas burner (for stuck nuts).
• 🛠 New rubber hangers (item 20635-40X00).
• 🧤 Gloves and safety glasses.

Sequence of actions:

1. Raise the car on a lift or drive it into a viewing hole. Be sure to secure the wheels with chocks and disconnect the negative terminal of the battery.

2. Treat all muffler fastenings (nuts on clamps and hanger bolts) with WD-40. Wait 10-15 minutes for the lubricant to take effect.

3. Unscrew the clamp connecting the muffler to the resonator. On Cefiro A32 it is usually secured with two 14mm bolts. If the bolts are stuck, use a gas torch to heat (but do not overheat, so as not to damage the rubber parts!).

4. Remove the rubber hangers supporting the muffler. They can be attached to the body with metal hooks or bolts.

5. Carefully remove the old muffler. Pay attention to the condition of the corrugation and resonator - if they are damaged, they should also be replaced.

6. Install the new muffler in reverse order. Do not overtighten the clampsuntil you are sure that all elements of the system are aligned and not stressed.

7. After installation, start the engine and check the connections for leaks. Listen to the sound - there should be no whistles or pops.

Cool the exhaust system (work only on a cold engine!)

Check that all fasteners are included in the new muffler kit.

Prepare new rubber hangers (old ones often break during dismantling)

Have a fire extinguisher on hand (when working with a gas burner)

Check the condition of the gasket between the resonator and the muffler -->

If you notice that vibration has appeared after replacing the muffler, check:

• 🔩 Proper tightening of clamps (they should not pinch the pipes).
• 🔄 Coaxiality of the muffler and resonator (if the axes do not coincide, tension occurs in the system).
• 🛑 Condition of the hangers (if they are torn or stretched, the muffler will hang loose).

Muffler Tuning: How to Improve Sound and Performance

Many owners Nissan Cefiro A32 strive to give a car a sportier character, and modifying the exhaust system is one of the most effective ways. However, it is important to understand that wrong tuning may lead to:

• ⚠️ Deterioration of traction at low speeds (due to a violation of backpressure).
• ⚠️ Problems with passing technical inspection (exceeding the noise level).
• ⚠️ Rapid wear of system elements (for example, when installing a “direct flow” without a resonator).

Let's look at popular tuning options for Cefiro A32:

1. Installation of the "spider" (4-2-1 or 4-1)

"Spider" replaces the standard manifold and improves exhaust gas removal. On Cefiro A32 with engines VQ20DE/VQ25DE often installed:

• 🔧 4-2-1 — optimal for low and medium speeds, adds ~5–7 hp.
• 🔥 4-1 — gives an increase at high speeds (from 4000 rpm), but can “choke” the engine at the bottom.

The cost of the “spider” is from 8,000 to 25,000 rubles, depending on the material (stainless steel or steel). Installation requires welding.

2. Replacing the muffler with a straight-through one

"Forward flow" (or straight-pipe) is a muffler without internal partitions, which provides minimal resistance to gas flow. On Cefiro A32 installing it gives:

• 🔊 Loud, sporty sound (may exceed permissible 95 dB).
• 🚀 Small increase in power (3–5 hp) by reducing back pressure.
• ⚠️ Risk of rapid wear — without partitions, the muffler burns out faster.

Popular brands for tuning:

• 🏆 Remus — balanced sound, high quality.
• 💥 Sprint — aggressive sound, suitable for the track.
• 🔧 Magnum - a budget option with good reviews.

⚠️ Attention: On Cefiro A32 with a catalyst, installing “forward flow” without modifying the ECU may cause an error P0420 (low catalyst efficiency). In this case, you will need firmware or installation of a decoy.

What is a "lambda probe decoy"?

A lambda probe decoy is a device that simulates the signal from a working catalyst, allowing the ECU to “think” that the system is working normally. On Cefiro A32 mechanical decoys (inserts with a hole) or electronic emulators are often used. However, their installation may be regarded as interfering with the vehicle's environmental class, which is prohibited in some regions.

Muffler repair: when you can do without replacement

When a muffler is damaged, it is not always necessary to completely replace it. In some cases you can get by local repairs, which will save time and money. Let's look at the most common methods:

1. Welding cracks

If the muffler is rusty or cracked in one place, it can be welded. To do this:

• 🔥 Use semi-automatic welding in an argon environment (for stainless steel).
• 🛠 Pre-clean the welding area to bare metal.
• ⚠️ Do not weld the muffler if it is very thin - the seam will quickly come apart.

The cost of welding work is from 1,500 to 3,000 rubles.

2. Bandaging

Can be used to temporarily repair small holes or cracks. repair bandages (for example, from ABRO or Permatex). They are a metal tape with a heat-resistant sealant. Algorithm of actions:

1. Clean the surface of the muffler from dirt and rust.
2. Apply sealant to the tape and wrap it around the damaged area.
3. Tighten the bandage with clamps and allow the sealant to cure (usually 1-2 hours).

This type of repair will last 3-6 months, but don't count on it as a permanent solution.

3. Replacing the corrugation

Muffler corrugation on Cefiro A32 - one of the most vulnerable places. It can be replaced separately without affecting the rest of the system. The average cost of a new corrugation is 1,500–2,500 rubles. When choosing, pay attention to:

• 🔄 Length and diameter - must match the old ones.
• 🔥 Material — optimally stainless steel with external braiding.
• 🔧 Mounting type - flanged or welded.

If you decide to repair the muffler yourself, remember:

• 🛑 Do not use cold welding for repairing the exhaust system - it cannot withstand high temperatures.
• 🔥 Work in a well-ventilated area — exhaust gases are toxic.
• 🔧 Check for leaks after repair using a soap solution (applied to the seams; bubbles will appear if gases leak).

Common mistakes when working with a muffler on the Cefiro A32

Even experienced car owners sometimes make mistakes when replacing or repairing a muffler. Here are the most common ones:

• 🔧 Ignoring rubber hangers. Old hangers often break during dismantling, but many people forget to replace them. This leads to vibrations and premature wear of the new muffler.
• 🔥 Re-stretching clamps. Excessive tightening force may deform pipes or break gaskets.
• ⚠️ Failure to follow the assembly sequence. For example, you first need to connect the muffler to the resonator, and only then attach the suspensions.
• 🛑 Use of incompatible spare parts. Muffler from Cefiro A33 or Maxima won't fit A32 due to different geometry.
• 🔊 Neglecting sound check. After installation, be sure to listen to the engine at different speeds - extraneous noise may indicate a leak.

Another common mistake is failure to check the condition of the catalyst before replacing the muffler. If the catalyst is clogged, this can lead to:

• 🔥 Increased pressure in the system and rapid failure of the new muffler.
• 🚗 Deterioration of car dynamics (the engine “chokes”).
• ⚠️Lamp lights up Check Engine on the dashboard.

To avoid these problems, before replacing the muffler:

1. Check the back pressure in the system (you can use a pressure gauge connected to the exhaust pipe).
2. Inspect the catalyst for melting or clogging (if it is severely clogged, it must be removed or replaced).
3. Make sure that the lambda probes are working correctly (check their signal using a diagnostic scanner).

Cost of work and where is the best place to replace the muffler

Muffler replacement price Nissan Cefiro A32 depends on the type of spare part, region and location of work. Consider the average prices for 2026:

Type of work	Cost (RUB)	Lead time	Where is the best place to do it?
Muffler replacement (with spare part)	5 000–12 000	1.5–2 hours	Service station or independently
Replacing corrugations	2 000–4 000	1 hour	Welding workshop
Spider installation 4-2-1	15 000–25 000	3–4 hours	Tuning studio
Welding cracks	1 500–3 000	30–60 minutes	Car service with argon welding
Exhaust system diagnostics	500–1 500	30 minutes	Any service station with diagnostic equipment

Where is the best place to do the work?

• 🔧 On your own - if you have experience, tools and an inspection hole. Savings on work can amount to 2,000–5,000 rubles.
• 🚗 At the service station — optimal for complex work (for example, replacing a spider or welding). The average cost of a standard hour is 1,000–1,500 rubles.
• 💥 At the tuning studio — if you are planning modifications (for example, installing a “forward flow” or a sports resonator). Here you will be offered a comprehensive approach, including ECU firmware.

When choosing a service, pay attention to:

• 📋 Availability guarantees for work (optimally 6–12 months).
• 🔧Usage specialized tool (for example, to loosen stuck nuts).
• 🛠 Opportunity free diagnostics after repair.

⚠️ Attention: Some services may offer “universal” mufflers that supposedly fit Cefiro A32. In practice, they often require modification (cutting, welding), which reduces reliability. Always check whether the spare part is original or a certified analogue.

FAQ: Frequently asked questions about mufflers on the Nissan Cefiro A32

Is it possible to drive with a burnt out muffler?

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

• 🔊 Increased noise (may attract the attention of the traffic police).
• 💨 Exhaust gases entering the cabin (hazardous to health!).
• 🔥 Overheating of exhaust system elements and the risk of fire.

It is recommended to replace the muffler within 1-2 weeks of discovering the problem.

Which muffler is better - stainless steel or aluminized steel?

Comparison:

• 🔧 Stainless steel: more expensive, but lasts 5–8 years, resistant to corrosion. Optimal for long-term use.
• 🛠 Aluminized steel: cheaper, but service life is 2-4 years. Suitable for budget renovation.

On Cefiro A32 with a mileage of more than 150,000 km, it is better to take stainless steel - it will pay for itself due to durability.

Is it necessary to flash the ECU after installing the "forward flow"?

Depends on engine type:

• 🔧 On VQ20DE without a catalyst, firmware is not necessary, but a lambda probe may be required.
• 🔥 On VQ25DE with a catalyst, firmware is desirable to avoid errors P0420 and optimize the fuel mixture.

The cost of firmware is from 5,000 to 15,000 rubles.

What to do if vibration appears after replacing the muffler?

Causes and solutions:

• 🔧 Axes misalignment muffler and resonator - reinstall, making sure alignment.
• 🛠 Torn hangers - replace with new ones (article no. 20635-40X00).
• 🔥 Overtightened clamps — loosen and tighten with a force of 20–25 Nm.

Is it possible to install a muffler from a Nissan Maxima A32 on the Cefiro?

No, despite the platform relationship, the silencers of these models not interchangeable:

• 🔧 Different geometry of fastenings.
• 📏 Differences in the length and bends of the pipes.
• 🔊 Different resonator locations.

Using a muffler from Maxima will require significant modification, which is impractical.