How to replace a catalytic converter on Buick LaCrosse?

First remove Catalytic Converter by lifting up the vehicle and support it. Secondly, disconnect the heated Oxygen Sensor (HO2S) electrical connector. Sweep the nuts off the exhaust manifold pipe and the exhaust manifold pipe gasket . Support on the exhaust system then remove the Catalytic Converter nuts and hangers then Catalytic Converter itself and its gasket in that order. Check and clean the mating areas of the exhaust manifold and exhaust pipe gasket remove the ho2s. Starting with installation, install the ho2s while ensuring the Catalytic Converter assembly is supported to prevent internal damage with vertical movement at most of 6 degrees. Mount the new gasket onto the exhaust pipe studs then support and mount the Catalytic Converter and selling the nuts till it is tightened to 60nm (44 lb ft). Next, change the new exhaust manifold pipe gasket and exhaust manifold pipe stud nuts , which should be tightened on 35 n.m (26 lb ft). Replace the Catalytic Converter hangers, remove the support from the exhaust system, and also put the ho2s electrical connector. Lastly, check the exhaust system against leakage and underbody contact before dropping the vehicle.

How to replace a three way catalytic converter on Buick Regal?

To replace the three way Catalytic Converter, initially lift and properly supported the vehicle. Unplug and unbolt the heated Oxygen Sensor wiring harness connector and retainers. Make sure that before you remove the bolts and gasket holding the Catalytic Converter in place that the exhaust system has proper support. Then, unlatch the exhaust manifold pipe stud nuts and the three way Catalytic Converter, and the exhaust manifold pipe gasket at exhaust manifold pipe studs must also be removed. Remove the heated Oxygen Sensor. For installation, you can start by installing the heated Oxygen Sensor and another new exhaust manifold pipe gasket to the exhaust manifold pipe studs. Support the three way Catalytic Converter and fasten the exhaust manifold pipe with stud nuts using 35 nm (26 ft. Lbs.). Install the Catalytic Converter Gasket and bolts by putting bolts tension of 45 nm (33 ft. Lbs.). Reconnect the heated o2 sensor wire harness connector and retainers, remove the support from the exhaust system, check for leaks and underbody contact, and finally, lower the vehicle. You should always replace the gaskets on the front and rear flanges when you service the Catalytic Converter assembly and never fit the orignal gasket.

OEM Buick Catalytic Converter

Cat. Converter

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169 Catalytic Converters found

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Buick Catalytic Converter Part Number: 19332467
$1033.00 MSRP: $1547.90
You Save: $514.90 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter, Catalytic Converter; Exhaust Pipe; Converter & Pipe; Converter, Exhaust Pipe
- Replaces: 15861402
Fits the following Buick Models:
- LaCrosse | 2007-2009 | CX, CXL | 6 Cyl 3.8 L GAS
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Buick Catalytic Converter Part Number: 20894010
$1010.96 MSRP: $1568.95
You Save: $557.99 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter, Catalytic Converter; Exhaust Manifold; Preconverter
- Position: Front
Fits the following Buick Models:
- LaCrosse | 2013-2016 | Base, Leather, Premium, Sport Touring, Touring | 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Buick Catalytic Converter Part Number: 22975354
$561.20 MSRP: $833.78
You Save: $272.58 (33%)
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Product Specifications
- Other Name: Converter, Catalytic Converter; Preconverter
Fits the following Buick Models:
- LaCrosse | 2017-2018 | Avenir, Base, Essence, Preferred, Premium | 6 Cyl 3.6 L GAS
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Buick Converter & Pipe, Rear Part Number: 19418933
$995.51 MSRP: $1488.85
You Save: $493.34 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/Exhaust Rear Manifold Pipe) "Kit"; Converter, Catalytic Converter
- Position: Rear
- Replaces: 20893999, 20907414, 20805599
Fits the following Buick Models:
- LaCrosse | 2010 | CX, CXL | 6 Cyl 3.0 L GAS
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Buick Catalytic Converter Part Number: 25204733
$371.95 MSRP: $582.08
You Save: $210.13 (37%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Converter, Catalytic Converter
Fits the following Buick Models:
- Encore GX | 2024 | Avenir, Preferred, Sport Touring | 3 Cyl 1.3 L GAS
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Buick Catalytic Converter Part Number: 25204734
$1071.48 MSRP: $1676.80
You Save: $605.32 (37%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Converter, Catalytic Converter
Fits the following Buick Models:
- Encore GX | 2024 | Avenir, Preferred, Sport Touring | 3 Cyl 1.3 L GAS
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Buick Catalytic Converter Part Number: 25196720
$903.09 MSRP: $1410.00
You Save: $506.91 (36%)
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Product Specifications
- Other Name: Converter, Catalytic Converter; Exhaust Pipe; Converter & Pipe
Fits the following Buick Models:
- Encore | 2019-2021 | Base, Essence, Preferred, Sport Touring | 4 Cyl 1.4 L GAS
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Buick Catalytic Converter Part Number: 25202307
$2161.92 MSRP: $3370.13
You Save: $1208.21 (36%)
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Product Specifications
- Other Name: Converter, Catalytic Converter
Fits the following Buick Models:
- Encore | 2021-2022 | Base, Preferred | 4 Cyl 1.4 L GAS
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Buick Cross Over Part Number: 24503125
$437.51 MSRP: $654.11
You Save: $216.60 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pipe, Exhaust Pipe; Crossover Pipe; Front Pipe; Cross Over Pipe; Exhaust Pipe
Fits the following Buick Models:
- LaCrosse | 2005-2009 | CX, CXL | 6 Cyl 3.8 L GAS
- LeSabre | 1995-2005 | Custom, Limited | 6 Cyl 3.8 L GAS
- Lucerne | 2006-2008 | CX, CXL | 6 Cyl 3.8 L GAS
- Park Avenue | 1995-2005 | Base, Ultra | 6 Cyl 3.8 L GAS
- Regal | 1996-2004 | 25th Anniversary Edition, Custom, Gran Sport, GS, GSE, Limited, LS, LSE, Olympic Gold Edition | 6 Cyl 3.8 L GAS
- Riviera | 1995-1999 | Base | 6 Cyl 3.8 L GAS
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Buick Catalytic Converter Part Number: 15861399
$1892.60 MSRP: $2838.58
You Save: $945.98 (34%)
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Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
Fits the following Buick Models:
- LaCrosse | 2005-2009 | CX, CXL | 6 Cyl 3.8 L GAS
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Buick Catalytic Converter Part Number: 15777196
$2216.46 MSRP: $3315.40
You Save: $1098.94 (34%)
ADD TO CART
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
Fits the following Buick Models:
- LaCrosse | 2008-2009 | Super | 8 Cyl 5.3 L GAS
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Buick Converter Part Number: 25056910
$644.74 MSRP: $955.47
You Save: $310.73 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter, Catalytic Converter; Catalytic Converter
Fits the following Buick Models:
- Century | 1985 | Custom, Estate Wagon, Limited, T-Type | 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L GAS, 6 Cyl 3.8 L GAS, 6 Cyl 4.3 L DIESEL
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Buick Catalytic Converter, Rear Part Number: 19418940
$1289.00 MSRP: $2004.07
You Save: $715.07 (36%)
ADD TO CART
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/Exhaust Rear Manifold Pipe) "Kit"; Converter & Pipe; Converter; Preconverter; Converter, Catalytic Converter
- Position: Rear
- Replaces: 22794842, 25886008, 20931546
Fits the following Buick Models:
- LaCrosse | 2010-2016 | Base, Convenience, CX, CXL, Leather, Premium | 4 Cyl 2.4 L GAS, 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
- Regal | 2011-2015 | Base, CXL, Premium | 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L GAS, 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
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Buick Catalytic Converter, Driver Side Part Number: 19418923
$1204.57 MSRP: $1804.18
You Save: $599.61 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/Exhaust Manifold Pipe) "Kit"; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Position: Driver Side
- Replaces: 15903507
Fits the following Buick Models:
- Enclave | 2009-2011 | CX, CXL | 6 Cyl 3.6 L GAS
View related parts
Buick Catalytic Converter Part Number: 24508098
Product Specifications
- Other Name: Converter; Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
Fits the following Buick Models:
- Regal | 1997-2000 | GS, LS, LSE | 6 Cyl 3.8 L GAS
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Buick Catalytic Converter Part Number: 25128983
Product Specifications
- Other Name: Converter, Catalytic Converter; Converter
Fits the following Buick Models:
- Regal | 1990-1992 | Custom, Gran Sport, Limited | 6 Cyl 3.8 L GAS
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Buick Catalytic Converter Part Number: 24504243
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Converter; Converter, Catalytic Converter; Converter, Exhaust Pipe
Fits the following Buick Models:
- Regal | 1994-1995 | Custom, Gran Sport, Limited | 6 Cyl 3.8 L GAS
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Buick Catalytic Converter Part Number: 24504613
Product Specifications
- Other Name: Converter; Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
Fits the following Buick Models:
- Regal | 1994-1996 | Custom | 6 Cyl 3.1 L GAS
View related parts
Buick Catalytic Converter Part Number: 10343187
$936.26 MSRP: $1402.65
You Save: $466.39 (34%)
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Replaces: 10337610, 12564328
Fits the following Buick Models:
- Regal | 2001-2003 | LS | 6 Cyl 3.8 L GAS
View related parts
Buick Exhaust Manifold Part Number: 22737796
$870.35 MSRP: $1348.90
You Save: $478.55 (36%)
Product Specifications
- Other Name: Converter, Catalytic Converter; Preconverter; Catalytic Converter
- Position: Rear
Fits the following Buick Models:
- LaCrosse | 2014-2016 | Base, Leather, Premium, Sport Touring | 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS

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Buick Catalytic Converter

Choose OEM Catalytic Converter, you're making the optimal decision for superior quality and perfect performance. You can feel confident because each component goes through stringent quality checks. Every part is carefully built to comply with Buick's factory specifications. You'll enjoy a smooth, worry-free installation that fits just right. At ChevyPartsDeal.com, you'll find it easy to get top-quality OEM Buick Catalytic Converter. You can shop at highly competitive prices and protect your budget. All our genuine Buick parts include a dependable manufacturer's warranty. You'll also appreciate our straightforward return policy and swift delivery services for extra convenience.

Buick Catalytic Converter Parts and Q&A

Catalytic Converter
19332467
Q: How to replace a catalytic converter on Buick LaCrosse?
A:
First remove Catalytic Converter by lifting up the vehicle and support it. Secondly, disconnect the heated Oxygen Sensor (HO2S) electrical connector. Sweep the nuts off the exhaust manifold pipe and the exhaust manifold pipe gasket . Support on the exhaust system then remove the Catalytic Converter nuts and hangers then Catalytic Converter itself and its gasket in that order. Check and clean the mating areas of the exhaust manifold and exhaust pipe gasket remove the ho2s. Starting with installation, install the ho2s while ensuring the Catalytic Converter assembly is supported to prevent internal damage with vertical movement at most of 6 degrees. Mount the new gasket onto the exhaust pipe studs then support and mount the Catalytic Converter and selling the nuts till it is tightened to 60nm (44 lb ft). Next, change the new exhaust manifold pipe gasket and exhaust manifold pipe stud nuts , which should be tightened on 35 n.m (26 lb ft). Replace the Catalytic Converter hangers, remove the support from the exhaust system, and also put the ho2s electrical connector. Lastly, check the exhaust system against leakage and underbody contact before dropping the vehicle.
Cross Over
24503125
Q: How to replace a three way catalytic converter on Buick Regal?
A:
To replace the three way Catalytic Converter, initially lift and properly supported the vehicle. Unplug and unbolt the heated Oxygen Sensor wiring harness connector and retainers. Make sure that before you remove the bolts and gasket holding the Catalytic Converter in place that the exhaust system has proper support. Then, unlatch the exhaust manifold pipe stud nuts and the three way Catalytic Converter, and the exhaust manifold pipe gasket at exhaust manifold pipe studs must also be removed. Remove the heated Oxygen Sensor. For installation, you can start by installing the heated Oxygen Sensor and another new exhaust manifold pipe gasket to the exhaust manifold pipe studs. Support the three way Catalytic Converter and fasten the exhaust manifold pipe with stud nuts using 35 nm (26 ft. Lbs.). Install the Catalytic Converter Gasket and bolts by putting bolts tension of 45 nm (33 ft. Lbs.). Reconnect the heated o2 sensor wire harness connector and retainers, remove the support from the exhaust system, check for leaks and underbody contact, and finally, lower the vehicle. You should always replace the gaskets on the front and rear flanges when you service the Catalytic Converter assembly and never fit the orignal gasket.