Nissan Maxima Muffler with Gasket - 1AEMK00047

Warranty & Shipping
How-To & Tools
Product Reviews
Vehicle Fit


  • Direct Fit Rear Muffler Section with Gasket
  • 2 bolt flange connection
  • Direct bolt on replacement
  • No modification necessary
  • Replaces dealer part numbers: 20100-3Y370, 201003Y370, 20100-3Y320, 201003Y320
  • Built to strict quality control standards
  • Not correct for 20th Anniversary Edition

Item Condition: New

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

Due to the nature and size, exhaust parts may incur minor dents or scratches from handling and load shifting during shipping. These damages do not affect the fit or function of the part. Neither our 60 Day satisfaction guarantee, nor the manufacturer's warranty, cover these insignificant damages.

  1. step : Removing the Muffler (0:52)
    • Spray the two 18mm nuts that hold the exhaust midpipe with penetrating oil
    • Hold the studs with a 16mm wrench
    • Remove the nuts with an 18mm deep socket
    • Remove the three rubber supports from their slots that hold the muffler
    • Pull the muffler through
  2. step : Installing the New Muffler (2:44)
    • Insert the muffler into place
    • Insert the rubber mounts into their slots
    • Place the exhaust gasket between the two exhaust pipes
    • Pinch the gasket by starting the nuts
    • Use a screwdriver to guide the gasket
    • Tighten the 18mm nuts

Tools needed for replacement:

    General Tools

  • Floor Jack
  • Jack Stands

  • Materials, Fluids, and Supplies

  • Rust Penetrant

  • Ratchets & Related

  • A Piece of Pipe (for leverage)
  • Ratchet
  • Socket Extensions

  • Sockets - Metric

  • 18mm Socket

  • Wrenches - Metric

  • 16mm Wrench

4.00/ 5.0
3 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Excelent Muffler
Product is excellent. Service could use some work but they were able to rectify the situation.
March 22, 2017
Not exactly a DIY
The muffler is installed and performing well! For that, I give a solid positive review. On the other hand I cant give great feedback on other detaisl. First, the gasket was not in the box when it arrived. The bolts on the flange are actually welded on so the nuts and bolts I had were not able to be used. Now since the mounting bolts are welded on, you would typically expect that the bolts would be included but they are not. I had to guess a bit and determined that it was as 10M 1.25 threaded metric. As for packaging, the box was too large and stuffed with some inflated plastic bag materials, the really didnt hold the muffler in place. The muffler had some surface dents on it but did not impact function. Now finally the install. Impossible to install in your garage with a jackstand. The length of this assembly does not allow you to get the exhaust pipe and muffler up over the axle with the car raised on a standard jack. You will either need a scissor lift or similar or you will need to take the car to a local shop and have them lift the car about 3 1/2 - 4 ft off the ground to get the muffler over the axle. I love the install videos. Maybe that should have been mentioned?? But then it might lower sales. Glad I bought it, but it was not easy.
August 18, 2017
Happy with the service but not with product
Received muffler as promised on time. But there were dents and some paint scratched off the muffler. Packaging was a joke. Already had an appointment with mechanic for the weekend to replace, but called 1aauto about damage. They were very nice, and sent me replacement. I canceled my appointment and waited for another week with loud noise of my old muffler. The replacement wasn’t better, also has some dents but paint was okay. Packaging was horrible. Only one thing wants to tell the seller, please inspect the product before mailing. Online customer can’t see the product before buying so we have to rely on the seller.
June 4, 2018
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
how loud is it?
J K May 22, 2016
It is completely factory in volume. No noticeable noise unless you are really on the gas.
Tyler W May 22, 2016
It has a nice low purr sound outside of the car. Inside it is pretty muted. I think it sound pretty much like OEM.
Tony L May 22, 2016
Its real quiet. Looking for loud this is not it
Nnamdi O May 22, 2016
Great product. It runs like an OEM replacement. So Far,, no loud noises. Very quiet.
Aziz I May 22, 2016
Its not loud at all .
Jose M May 22, 2016
OEM quiet
Brian F May 23, 2016
Does this muffler improve performance and gas mileage?
Richard W November 28, 2016
Will, not James. Cant say if improves performance and gas since other improvements were also made around the same time: new oxygen sensors; new ignition coil; new driveaxle; new brake pads, rotors and calipers; etc.
James H November 28, 2016
stock replacement. No performance or mileage gains over OEM muffler
Brian F November 29, 2016
Compared to my previous leaky muffler...yes.
Tony L November 29, 2016
Year Make Model Description
2000-2001Nissan Maxima Nissan Maxima Rear Muffler with Gasket V6 3.0L (excluding 20th Anniversary Edition)
2002-2003Nissan Maxima Nissan Maxima Rear Muffler with Gasket V6 3.5L
Part #: 1AEMK00047

Order must be placed by 4pm ET
Delivery options for:

Estimated Arrival Cost

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Get it in: 2 - 4 Business Days

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How-to Video:

(04:54 min)