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

Cat. 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%)
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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%)
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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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Mazda Catalytic Converter

Every part of the car is important. Your vehicle's performance will be compromised if something goes wrong with the Mazda Catalytic Converter. Therefore, for your smooth driving and safety, you need regular checks and timely replacements. Whenever you need replacements, opt for genuine Mazda Catalytic Converters. Because they meet the manufacturer's criteria, it guarantees that replacements fit perfectly. Thus, these make better choices for people who care about driving. Why should you shop at MazdaPartsNow.com? We sell genuine Mazda Catalytic Converters. In our online catalog, there is a wide range of different parts. These are delivered directly from authorized Mazda dealers only so that customers can be sure of their security throughout any transaction while using our website. Furthermore, you can also quickly search for OEM parts you want because of our user-friendly site navigation. Choose us for a genuine Mazda Catalytic Converter that keeps your car running like new.

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.