How to replace the lower catalytic converter on Mazda 3?

On all models, the "warm up" catalytic converter is an integral component of the exhaust manifold and cannot be serviced separately. To replace the lower converter, raise the vehicle and support it securely on jackstands. Remove the downstream oxygen sensor(s) from the catalyst. Next, remove the nuts and bolts that secure the flange at the front end of the catalyst to the exhaust down pipe; if the threads are severely damaged or rusted, apply some penetrant to the threads and wait a while before loosening them. Unhook the rubber mounts and remove the catalytic converter, then discard the old gasket between the exhaust down pipe and the catalyst mounting flange. Installation is the reverse of removal, ensuring to use a new gasket and, if necessary, new fasteners.

How to remove and install the catalytic converter on Mazda 6?

On all engines except the 3.7L V6, the catalytic converters are integral components of the exhaust manifolds and cannot be serviced separately. The catalytic converter is located under the vehicle. Begin by raising the vehicle and placing it securely on jackstands. Locate the downstream oxygen sensor on the upper central part of the catalyst, trace the sensor to its electrical connector, and disconnect it. Unscrew and remove the downstream oxygen sensor from the catalyst. Next, remove the nuts and bolts that secure the flange at the front end of the catalyst to the exhaust down pipe; if the threads are severely damaged or rusted, apply some penetrant to the threads and wait before loosening them. Loosen the fasteners on the clamp that secures the rear end of the catalyst to the exhaust system, and again, if the threads are severely damaged or rusted, apply some penetrant and wait before loosening. Remove the heat shields and take out the catalytic converter. Discard the old gasket between the exhaust down pipe and the catalyst mounting flange. Installation is the reverse of removal, using a new gasket and, if necessary, new fasteners.

Genuine Mazda Catalytic Converter

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288 Catalytic Converters found

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Mazda Catalytic Converter Part Number: LFYH-20-55XC
$669.50 MSRP: $914.80
You Save: $245.30 (27%)
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Product Specifications
- Other Name: Converter; Catalytic Converter
- Replaces: LFYH-20-55XA, LF45-20-55XB, LF45-20-60XA, LFYH-20-55XB, LF45-20-60XD, LF45-20-55XC, LFYH-20-55X
Fits the following Mazda Models:
- MX-5 Miata | 2006-2009 | Base, Club Spec, Grand Touring, Sport, SV, Touring | 4 Cyl 2.0 L GAS
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Mazda Exhaust Manifold Part Number: PY31-20-50X
$614.65 MSRP: $839.85
You Save: $225.20 (27%)
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Product Specifications
- Other Name: Converter; Exhaust Manifold
Fits the following Mazda Models:
- 3 | 2014-2016 | s Grand Touring, s Touring | 4 Cyl 2.5 L GAS
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Mazda Exhaust Manifold Part Number: LFK9-20-50XB
$688.14 MSRP: $940.28
You Save: $252.14 (27%)
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Product Specifications
- Other Name: Converter
- Replaced by: LFK9-20-50XD
Fits the following Mazda Models:
- 3 | 2010-2011 | i | 4 Cyl 2.0 L GAS
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Mazda Catalytic Converter Part Number: PY33-20-55X
$690.76 MSRP: $943.86
You Save: $253.10 (27%)
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Product Specifications
- Other Name: Converter; Catalytic Converter
Fits the following Mazda Models:
- CX-5 | 2014-2015 | Grand Touring, Sport, Touring | 4 Cyl 2.5 L GAS
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Mazda Catalytic Converter Part Number: PY35-20-55XA
$690.76 MSRP: $943.86
You Save: $253.10 (27%)
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Product Specifications
- Other Name: Converter; Catalytic Converter
Fits the following Mazda Models:
- CX-5 | 2014-2015 | Grand Touring, Sport, Touring | 4 Cyl 2.5 L GAS
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Mazda Exhaust Manifold Part Number: PE3D-20-50X
$703.29 MSRP: $960.97
You Save: $257.68 (27%)
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Product Specifications
- Other Name: Converter; Exhaust Manifold
- Replaces: PEB4-20-50X, PEB4-20-50XA
Fits the following Mazda Models:
- 3 | 2014-2016 | i Grand Touring, I Sport, i SV, I Touring | 4 Cyl 2.0 L GAS
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Mazda Catalytic Converter Part Number: BP4Y-20-500C
$727.17 MSRP: $993.61
You Save: $266.44 (27%)
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Product Specifications
- Other Name: Converter, Catalytic; Catalytic Converter, Preconverter
Fits the following Mazda Models:
- Miata | 1999-2000 | 10th Anniversary, Base, LS, SE | 4 Cyl 1.8 L GAS
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Mazda Exhaust Manifold Part Number: PE19-20-50XC
$730.69 MSRP: $998.42
You Save: $267.73 (27%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Converter
- Replaces: PE19-20-50XA, PE19-20-50XB
Fits the following Mazda Models:
- 3 | 2012-2013 | i, Mazdaspeed, S | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS
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Mazda Catalytic Converter Part Number: PE03-20-55XB
$733.27 MSRP: $1001.93
You Save: $268.66 (27%)
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Product Specifications
- Other Name: Converter; Catalytic Converter
- Replaces: PE03-20-55XA
Fits the following Mazda Models:
- CX-5 | 2013-2015 | Grand Touring, Sport, Touring | 4 Cyl 2.0 L GAS
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Mazda Manifold W/Converter Part Number: L579-20-50X
$696.88 MSRP: $952.21
You Save: $255.33 (27%)
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Product Specifications
- Other Name: Converter
Fits the following Mazda Models:
- 3 | 2011 | S | 4 Cyl 2.5 L GAS
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Mazda Catalytic Converter Part Number: PE06-20-55XB
$758.89 MSRP: $1036.94
You Save: $278.05 (27%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Converter; Catalytic Converter
- Replaces: PE06-20-55XA
Fits the following Mazda Models:
- CX-5 | 2013-2015 | Grand Touring, Sport, Touring | 4 Cyl 2.0 L GAS
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Mazda Converter & Pipe Part Number: PY2B-20-55XA
$763.27 MSRP: $1042.92
You Save: $279.65 (27%)
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Product Specifications
- Other Name: Converter; Converter & Pipe
- Replaces: PY2B-20-55X
Fits the following Mazda Models:
- CX-5 | 2021 | Carbon Edition Turbo, Grand Touring Reserve, Signature | 4 Cyl 2.5 L GAS
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Mazda Converter & Pipe Part Number: BP4W-20-55XK
$773.63 MSRP: $1057.08
You Save: $283.45 (27%)
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Product Specifications
- Other Name: Converter
- Replaces: BP4W-20-55XH, BP4W-20-55XJ
Fits the following Mazda Models:
- Miata | 1999-2000 | 10th Anniversary, Base, LS, SE | 4 Cyl 1.8 L GAS
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Mazda Converter & Pipe Part Number: PY78-20-55X
$821.83 MSRP: $1122.94
You Save: $301.11 (27%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Converter
Fits the following Mazda Models:
- CX-5 | 2016 | Grand Touring, Sport, Touring | 4 Cyl 2.5 L GAS
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Mazda Catalytic Converter Part Number: L362-20-55XE
$781.50 MSRP: $1067.83
You Save: $286.33 (27%)
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Product Specifications
- Other Name: Converter; Catalytic Converter
- Replaces: L362-20-55XC, L362-20-55XD, L362-20-55XB, L362-20-55X, L362-20-55XA
Fits the following Mazda Models:
- 6 | 2003-2008 | i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda Catalytic Converter Part Number: LFB6-20-55XC
$766.09 MSRP: $1046.78
You Save: $280.69 (27%)
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Product Specifications
- Other Name: Converter; Catalytic Converter
- Replaces: LFB6-20-55XB, LFB6-20-55X
Fits the following Mazda Models:
- 3 | 2007-2009 | i | 4 Cyl 2.0 L GAS
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Mazda Catalytic Converter Part Number: BPS5-20-55X
$796.12 MSRP: $1087.82
You Save: $291.70 (27%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Converter; Catalytic Converter
Fits the following Mazda Models:
- Miata | 2004-2005 | Base, LS, Mazdaspeed | 4 Cyl 1.8 L GAS
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Mazda Exhaust Manifold Part Number: PYF1-20-50X
$852.52 MSRP: $1164.88
You Save: $312.36 (27%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter; Exhaust Manifold
Fits the following Mazda Models:
- CX-5 | 2017-2018 | Grand Select, Grand Touring, Sport, Touring | 4 Cyl 2.5 L GAS
View related parts
Mazda Exhaust Manifold Part Number: L579-20-50XA
Product Specifications
- Other Name: Converter
- Replaces: L579-20-50X
Fits the following Mazda Models:
- 3 | 2011-2013 | S | 4 Cyl 2.5 L GAS
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Mazda Catalytic Converter Part Number: L3G6-20-55XC
Product Specifications
- Other Name: Converter; Catalytic Converter
Fits the following Mazda Models:
- 3 | 2007-2009 | Mazdaspeed, S | 4 Cyl 2.3 L GAS

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1-20 of 288 Results

Mazda Catalytic Converter

The Mazda Catalytic Converter converts noxious exhaust into cleaner air, giving each ride a greener breath and keeping performance alive. Mazda has made its name in fun, the magic of the rotary legacy and modern Skyactiv engines that get you more miles on every drop of fuel and don't lose their punch. Its Kodo design wraps that engineering up in sleek lines that look poised even at a standstill and i-Activsense tech such as lane keep and radar cruise watches the road to calming nerves on long trips. All-wheel drive testing on rough tracks sees Mazda able to combine grip with the brand's trademark light steering so drivers feel connected rather than isolated, and up-and-coming electric and mild hybrid systems promise even more efficiency without sacrificing fun. While the cars engage the senses, the catalytic system works hard under the floor. A Mazda Catalytic Converter is located in the exhaust stream as hot gases contact a honeycomb coated with precious metals that initiate chemical reactions that convert carbon monoxide and unburned fuel to water vapor and carbon dioxide and liberate oxygen from nitrogen oxides to allow harmless nitrogen to escape. This three-way setup meets strict emission rules but maintains a low backpressure so the acceleration remains quick. If a Catalytic Converter becomes clogged after extreme heat or impact, replacing it allows you to return to clean running and help save the planet, which is one of Mazda's commitments to responsible performance.

You'll get great performance and real durability when you pick genuine OEM Catalytic Converter. Mazda builds these using high-quality materials and official factory methods to ensure they hold up mile after mile. You deserve that Mazda reliability without the headache of cheap knockoffs. It is easy to find exactly what you need in our huge inventory of genuine parts. Plus, every OEM part carries a real manufacturer's warranty for your peace of mind. You will love our low prices too. Order today and we will ship your brand-new parts fast. They often reach your door in just a few days.

Mazda Catalytic Converter Parts and Q&A

Manifold W/Converter
L577-20-50X
Q: How to replace the lower catalytic converter on Mazda 3?
A:
On all models, the "warm up" catalytic converter is an integral component of the exhaust manifold and cannot be serviced separately. To replace the lower converter, raise the vehicle and support it securely on jackstands. Remove the downstream oxygen sensor(s) from the catalyst. Next, remove the nuts and bolts that secure the flange at the front end of the catalyst to the exhaust down pipe; if the threads are severely damaged or rusted, apply some penetrant to the threads and wait a while before loosening them. Unhook the rubber mounts and remove the catalytic converter, then discard the old gasket between the exhaust down pipe and the catalyst mounting flange. Installation is the reverse of removal, ensuring to use a new gasket and, if necessary, new fasteners.
Catalytic Converter
L541-20-55XD
Q: How to remove and install the catalytic converter on Mazda 6?
A:
On all engines except the 3.7L V6, the catalytic converters are integral components of the exhaust manifolds and cannot be serviced separately. The catalytic converter is located under the vehicle. Begin by raising the vehicle and placing it securely on jackstands. Locate the downstream oxygen sensor on the upper central part of the catalyst, trace the sensor to its electrical connector, and disconnect it. Unscrew and remove the downstream oxygen sensor from the catalyst. Next, remove the nuts and bolts that secure the flange at the front end of the catalyst to the exhaust down pipe; if the threads are severely damaged or rusted, apply some penetrant to the threads and wait before loosening them. Loosen the fasteners on the clamp that secures the rear end of the catalyst to the exhaust system, and again, if the threads are severely damaged or rusted, apply some penetrant and wait before loosening. Remove the heat shields and take out the catalytic converter. Discard the old gasket between the exhaust down pipe and the catalyst mounting flange. Installation is the reverse of removal, using a new gasket and, if necessary, new fasteners.