How to replace the catalytic converter on Chevrolet Impala?

To replace the Catalytic Converter, remove the intake manifold cover, after which you need to remove the connector position assurance (CPA) retainer and the heated oxygen sensor (HO2S) electrical connector clip from the ignition coil bracket, then of course getting the ho2s electrical connector . Next, we remove the bolts on the Exhaust Manifold heat shield and the heat shield. Then remove the upper Catalytic Converter to the nut on the Exhaust Manifold and raise and support the vehicle. When removing the ho2s, take off the cpa retainer and disconnect the ho2s electrical connector. Support the exhaust system, there out the Catalytic Converter to Muffler nuts,please do the same to the Catalytic Converter insulators, and the Catalytic Converter lower nut. Reposition the Muffler assembly aff position to remove a Catalytic Converter and a Catalytic Converter Gasket. Clean and inspect the Exhaust Manifold mating surface along with exhaust pipe gasket mating surface. For installation, fit Catalytic Converter Gasket onto the Catalytic Converter, reposition Muffler assembly and install Catalytic Converter. Replace the Catalytic Converter lower nut and tighten to 35 n.m (26 lb ft), replace the Catalytic Converter insulators and replace the Catalytic Converter to Muffler nuts and tighten to 60 n.m (44 lb ft). Remove support from exhaust system, o2s, install retainer cpa. Reduce the vehicle and bring in the upper Catalytic Converter to Exhaust Manifold nut, and tighten up to 35 n.m (26 lb ft). Reinstall the burner manifold heat shield and its screws to a torque of 10 n.m (89 lb in) then the ho2s electrical connector , the cpa retainer , followed by the heated oxygen sensor (HO2S) electrical connector clip to the ignition coil bracket attached to the intake manifold cover.

How to service a three way catalytic converter on Chevrolet Impala?

It is a necessity to replace the whole assembly to service the three way Catalytic Converter, using a new gasket at the front flange, always refittings, never refitting the original. Start by lifting and holding the vehicle. Remove the heated Oxygen Sensor electrical connector, take out the exhaust manifold pipe studnuts before removing the Catalytic Converter bolts, prior to you removing the three way Catalytic Converter. Then, take off the heated Oxygen Sensor (H02SI or HO2S2). Install it first by installing the heated Oxygen Sensor (HO25 or HO2S2) then install a new exhaust manifold pipe guitar. Make sure to support the three way Catalytic Converter and bolt the Catalytic Converter. The exhaust manifold pipe stud nuts need to be tightened to 32 nm (24 ft. Lbs.) and the Catalytic Converter bolts to 45 nm (33 ft. Lbs.). Lastly, reconnect heated Oxygen Sensor electrical connector, check for leak and under body contact, and lower vehicle.

OEM Chevrolet Impala Catalytic Converter

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42 Catalytic Converters found

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Chevrolet Impala Catalytic Converter Part Number: 84216836
$684.58 MSRP: $1019.88
You Save: $335.30 (33%)
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Product Specifications
- Other Name: Converter, Catalytic Converter; Preconverter
- Replaced by: 19420239
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2016-2020 Chevrolet Impala | LS, LT, LTZ, Premier | 6 Cyl 3.6 L BI-FUEL, 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Chevrolet Impala Catalytic Converter Part Number: 19420258
$881.22 MSRP: $1810.81
You Save: $929.59 (52%)
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Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/Exhaust Front Manifold Pipe); Converter & Pipe; Converter, Catalytic Converter
- Replaces: 20831819
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2012-2013 Chevrolet Impala | LS, LT, LTZ, Police | 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Chevrolet Impala Catalytic Converter Part Number: 22740667
$947.93 MSRP: $1749.63
You Save: $801.70 (46%)
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Product Specifications
- Other Name: Converter, Catalytic Converter; Intermed Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2012-2013 Chevrolet Impala | LS, LT, LTZ, Police | 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Chevrolet Impala Catalytic Converter Part Number: 22839597
$1389.16 MSRP: $2534.90
You Save: $1145.74 (46%)
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Product Specifications
- Other Name: Converter, Catalytic Converter; Exhaust Pipe; Converter & Pipe
- Replaces: 20831817
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2012-2013 Chevrolet Impala | LS, LT, LTZ, Police | 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Chevrolet Impala Catalytic Converter Part Number: 19420254
$705.95 MSRP: $1091.62
You Save: $385.67 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/Exhaust Pipe); Preconverter; Converter, Catalytic Converter
- Replaces: 23276242
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2016-2020 Chevrolet Impala | LS, LT, LTZ, Premier | 6 Cyl 3.6 L BI-FUEL, 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Chevrolet Impala Catalytic Converter, Rear Part Number: 19420114
$869.70 MSRP: $1347.88
You Save: $478.18 (36%)
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Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/Exhaust Rear Manifold Pipe) "Kit"; Preconverter; Converter, Catalytic Converter
- Position: Rear
- Replaces: 20926628
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2015 Chevrolet Impala | LS, LT, LTZ | 6 Cyl 3.6 L BI-FUEL, 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Chevrolet Impala Catalytic Converter, Rear Part Number: 19420250
$1022.52 MSRP: $1587.06
You Save: $564.54 (36%)
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Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/Exhaust Rear Manifold Pipe); Converter & Pipe; Converter, Catalytic Converter
- Position: Rear
- Replaces: 20831816, 22839596
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2012-2013 Chevrolet Impala | LS, LT, LTZ, Police | 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Chevrolet Impala Catalytic Converter, Rear Part Number: 19420100
$1185.62 MSRP: $1842.28
You Save: $656.66 (36%)
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Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/Exhaust Rear Manifold Pipe) "Kit"; Exhaust Pipe
- Position: Rear
- Replaces: 21000000, 22794847
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014 Chevrolet Impala | Eco | 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
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Chevrolet Impala Catalytic Converter Part Number: 19420231
$1187.58 MSRP: $1845.36
You Save: $657.78 (36%)
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Product Specifications
- Other Name: Converter Assembly, Warm Up 3Way Catalytic (Kit); Converter, Catalytic Converter
- Replaces: 12633865, 12656264
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2016 Chevrolet Impala | LS, LT, LTZ | 4 Cyl 2.5 L FLEX, 4 Cyl 2.5 L GAS
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Chevrolet Impala Catalytic Converter, Rear Part Number: 19418940
$1321.01 MSRP: $2054.17
You Save: $733.16 (36%)
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Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/Exhaust Rear Manifold Pipe) "Kit"
- Position: Rear
- Replaces: 22794842, 20931546, 25886008
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014 Chevrolet Impala | Eco | 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
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Chevrolet Impala Catalytic Converter Part Number: 20831820
$1406.29 MSRP: $2187.62
You Save: $781.33 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter, Catalytic Converter; Exhaust Pipe; Converter & Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2012-2013 Chevrolet Impala | LS, LT, LTZ, Police | 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Chevrolet Impala 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
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000-2005 Chevrolet Impala | Base, LS, LS Sport, SS | 6 Cyl 3.8 L GAS
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Chevrolet Impala Catalytic Converter Part Number: 19418922
$1090.06 MSRP: $1631.46
You Save: $541.40 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/Exhaust Pipe) "Kit"; Preconverter; Converter, Catalytic Converter
- Replaces: 20926629
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2015 Chevrolet Impala | LS, LT, LTZ | 6 Cyl 3.6 L BI-FUEL, 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Chevrolet Impala Catalytic Converter Part Number: 19420234
$1193.28 MSRP: $1787.15
You Save: $593.87 (34%)
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Product Specifications
- Other Name: Converter Assembly, Warm Up 3Way Catalytic (Kit); Converter, Catalytic Converter
- Replaces: 12627204, 12656263
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2019 Chevrolet Impala | LS, LT, LTZ | 4 Cyl 2.5 L FLEX, 4 Cyl 2.5 L GAS
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Chevrolet Impala Catalytic Converter, Rear Part Number: 19420266
$1212.03 MSRP: $1815.44
You Save: $603.41 (34%)
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Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/Exhaust Rear Manifold Pipe); Preconverter; Converter, Catalytic Converter
- Position: Rear
- Replaces: 20929196
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2020 Chevrolet Impala | LS, LT, LTZ, Premier | 6 Cyl 3.6 L BI-FUEL, 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Chevrolet Impala Catalytic Converter Part Number: 19420240
$1364.16 MSRP: $2044.88
You Save: $680.72 (34%)
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Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/Exhaust Pipe); Preconverter; Converter, Catalytic Converter
- Replaces: 20929216, 84647489, 84216838
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2020 Chevrolet Impala | LS, LT, LTZ, Premier | 6 Cyl 3.6 L BI-FUEL, 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Chevrolet Impala Catalytic Converter Part Number: 25950919
$1547.02 MSRP: $2320.70
You Save: $773.68 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2011 Chevrolet Impala | LS, LT | 6 Cyl 3.5 L FLEX
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Chevrolet Impala Catalytic Converter Part Number: 25820195
$1611.71 MSRP: $2407.37
You Save: $795.66 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe
- Replaces: 15780299
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2011 Chevrolet Impala | 50th Anniversary Edition, LS, LT, LTZ, Police | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS, 6 Cyl 3.9 L FLEX, 6 Cyl 3.9 L GAS
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Chevrolet Impala Catalytic Converter Part Number: 25950920
$1684.26 MSRP: $2516.30
You Save: $832.04 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2011 Chevrolet Impala | LS, LTZ, Police | 6 Cyl 3.9 L FLEX
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Chevrolet Impala Converter & Pipe Part Number: 25820197
$1742.09 MSRP: $2603.13
You Save: $861.04 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Catalytic Converter; Exhaust Pipe
- Replaces: 15912308
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2009 Chevrolet Impala | LT, LTZ, Police | 6 Cyl 3.9 L FLEX

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Chevrolet Impala Catalytic Converter

Want to cut long-term maintenance and repair costs? Choose OEM Catalytic Converter. Those parts deliver top durability you can trust. On our site, you'll find a huge catalog of genuine Chevrolet Impala parts. Prices are unbeatable, so you can keep more in your pocket. Every OEM Chevrolet Impala Catalytic Converter includes a manufacturer's warranty. You can also get an easy return policy that keeps buying risk free. Fast delivery, get your car on the road quickly. It's simple to search, compare, and order. Stop guessing about quality or fit. Order today and save with parts that last.

Under the Chevrolet Impala exhaust system is a Catalytic Converter that helps to reduce hazardous fumes into harmless elements such as water. There are symptoms that point towards a blocked converter in the Impala these include; the car unimaginable to get to 35 mph or 3,500 rpm, sluggish acceleration as well as poor mileage. To care for the converter, keep the engine, fuel and exhaust systems as healthy as possible, use a clean fuel and refrain from running your engine too lean. This catalytic converter should be three-way for gasoline Impalas and two-way for diesel engines; These devices have over the years been modified to conform to emissions and cut unhealthy pollutants hence are vital in environmental conservation.

Chevrolet Impala Catalytic Converter Parts and Q&A

Catalytic Converter
25820195
Q: How to replace the catalytic converter on Chevrolet Impala?
A:
To replace the Catalytic Converter, remove the intake manifold cover, after which you need to remove the connector position assurance (CPA) retainer and the heated oxygen sensor (HO2S) electrical connector clip from the ignition coil bracket, then of course getting the ho2s electrical connector . Next, we remove the bolts on the Exhaust Manifold heat shield and the heat shield. Then remove the upper Catalytic Converter to the nut on the Exhaust Manifold and raise and support the vehicle. When removing the ho2s, take off the cpa retainer and disconnect the ho2s electrical connector. Support the exhaust system, there out the Catalytic Converter to Muffler nuts,please do the same to the Catalytic Converter insulators, and the Catalytic Converter lower nut. Reposition the Muffler assembly aff position to remove a Catalytic Converter and a Catalytic Converter Gasket. Clean and inspect the Exhaust Manifold mating surface along with exhaust pipe gasket mating surface. For installation, fit Catalytic Converter Gasket onto the Catalytic Converter, reposition Muffler assembly and install Catalytic Converter. Replace the Catalytic Converter lower nut and tighten to 35 n.m (26 lb ft), replace the Catalytic Converter insulators and replace the Catalytic Converter to Muffler nuts and tighten to 60 n.m (44 lb ft). Remove support from exhaust system, o2s, install retainer cpa. Reduce the vehicle and bring in the upper Catalytic Converter to Exhaust Manifold nut, and tighten up to 35 n.m (26 lb ft). Reinstall the burner manifold heat shield and its screws to a torque of 10 n.m (89 lb in) then the ho2s electrical connector , the cpa retainer , followed by the heated oxygen sensor (HO2S) electrical connector clip to the ignition coil bracket attached to the intake manifold cover.
Cross Over
24503125
Q: How to service a three way catalytic converter on Chevrolet Impala?
A:
It is a necessity to replace the whole assembly to service the three way Catalytic Converter, using a new gasket at the front flange, always refittings, never refitting the original. Start by lifting and holding the vehicle. Remove the heated Oxygen Sensor electrical connector, take out the exhaust manifold pipe studnuts before removing the Catalytic Converter bolts, prior to you removing the three way Catalytic Converter. Then, take off the heated Oxygen Sensor (H02SI or HO2S2). Install it first by installing the heated Oxygen Sensor (HO25 or HO2S2) then install a new exhaust manifold pipe guitar. Make sure to support the three way Catalytic Converter and bolt the Catalytic Converter. The exhaust manifold pipe stud nuts need to be tightened to 32 nm (24 ft. Lbs.) and the Catalytic Converter bolts to 45 nm (33 ft. Lbs.). Lastly, reconnect heated Oxygen Sensor electrical connector, check for leak and under body contact, and lower vehicle.