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 Regal Catalytic Converter

Cat. Converter

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27 Catalytic Converters found

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Buick Regal Catalytic Converter
Part Number: 19420298
$829.58 MSRP: $1233.00
You Save: $403.42 (33%)
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Product Specifications
- Other Name: Converter Assembly, Catalytic (W/ Exhaust Manifold Pipe); Converter; Converter, Catalytic Converter
- Replaces: 23135211
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2016-2017 Buick Regal | Base, 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 Regal Catalytic Converter
Part Number: 19420223
$910.39 MSRP: $1354.33
You Save: $443.94 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter Assembly, Warm Up 3Way Catalytic (Kit); Converter; Converter, Catalytic Converter
- Replaces: 12645922, 12660225
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2017 Buick Regal | Base, GS, Premium, Sport Touring | 4 Cyl 2.0 L GAS
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Buick Regal Catalytic Converter, Rear
Part Number: 19420100
$935.98 MSRP: $1392.77
You Save: $456.79 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/Exhaust Rear Manifold Pipe) "Kit"; Exhaust Pipe; Converter & Pipe; Converter; Preconverter; Converter, Catalytic Converter
- Position: Rear
- Replaces: 21000000, 22794847
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2015 Buick Regal | 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 Regal 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
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2004 Buick Regal | 25th Anniversary Edition, Custom, Gran Sport, GS, GSE, Limited, LS, LSE, Olympic Gold Edition | 6 Cyl 3.8 L GAS
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Buick Regal Catalytic Converter
Part Number: 12641644
$1409.08 MSRP: $2103.12
You Save: $694.04 (33%)
ADD TO CART
Product Specifications
- Other Name: Converter, Catalytic Converter; Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2012-2013 Buick Regal | GS, Premium | 4 Cyl 2.0 L FLEX
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Buick Regal Catalytic Converter, Rear
Part Number: 19418940
$1343.11 MSRP: $2004.07
You Save: $660.96 (33%)
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
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2015 Buick Regal | 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)
View related parts
Buick Regal Catalytic Converter
Part Number: 25104596
Product Specifications
- Other Name: Converter, Catalytic Converter; Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1993 Buick Regal | Custom, Gran Sport, Limited | 6 Cyl 2.8 L GAS, 6 Cyl 3.1 L GAS
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Buick Regal Converter
Part Number: 25056622
Product Specifications
- Other Name: Catalytic Converter; Converter, Exhaust System Catalytic; Converter, Catalytic Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1984-1987 Buick Regal | Base, GNX, Grand National, Limited, T-Type | 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS, 6 Cyl 4.3 L DIESEL, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L DIESEL
View related parts
Buick Regal Catalytic Converter
Part Number: 25056790
Product Specifications
- Other Name: Converter; Converter, Catalytic Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1984-1985 Buick Regal | Base, Limited | 6 Cyl 4.3 L DIESEL
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Buick Regal Converter
Part Number: 25131709
Product Specifications
- Other Name: Catalytic Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993 Buick Regal | Custom, Gran Sport, Limited | 6 Cyl 3.8 L GAS
View related parts
Buick Regal Catalytic Converter
Part Number: 10185103
Product Specifications
- Other Name: Converter, Catalytic Converter; Exhaust Pipe; Front Pipe; Converter & Pipe; Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993 Buick Regal | Custom, Gran Sport, Limited | 6 Cyl 3.8 L GAS
View related parts
Buick Regal Converter
Part Number: 25131790
Product Specifications
- Other Name: Converter, 3Way Catalytic; Catalytic Converter; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993 Buick Regal | Custom, Limited | 6 Cyl 3.1 L GAS
View related parts
Buick Regal Catalytic Converter
Part Number: 24508101
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-2000 Buick Regal | 25th Anniversary Edition, GS, GSE | 6 Cyl 3.8 L GAS
View related parts
Buick Regal Catalytic Converter
Part Number: 24505385
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Converter, Catalytic Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996 Buick Regal | Custom, Gran Sport, Limited, Olympic Gold Edition | 6 Cyl 3.8 L GAS
View related parts
Buick Regal Catalytic Converter
Part Number: 24508097
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Replaces: 24507883, 24506838
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-2000 Buick Regal | GS, LS, LSE | 6 Cyl 3.8 L GAS
View related parts
Buick Regal Catalytic Converter
Part Number: 10343189
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2004 Buick Regal | GS | 6 Cyl 3.8 L GAS
View related parts
Buick Regal Catalytic Converter
Part Number: 24507351
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000 Buick Regal | LS, LSE | 6 Cyl 3.8 L GAS
View related parts
Buick Regal Catalytic Converter
Part Number: 10330020
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004 Buick Regal | LS | 6 Cyl 3.8 L GAS
View related parts
Buick Regal Catalytic Converter
Part Number: 12646225
Product Specifications
- Other Name: Converter, Catalytic Converter; Converter
- Replaces: 12626553
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2013 Buick Regal | CXL, GS, Premium | 4 Cyl 2.0 L FLEX
View related parts
Buick Regal Catalytic Converter
Part Number: 10343185
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Replaces: 10301642, 25325228
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2002 Buick Regal | LS | 6 Cyl 3.8 L GAS

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Buick Regal Catalytic Converter

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Buick Regal Catalytic Converter Parts Questions & Experts Answers

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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.