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Shopping for 2021-Toyota-4Runner
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Catalytic Converter

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Front Driver Catalytic Converter
A-Premium®
1-PC Catalytic Converter Front Left Driver Side Fit Federal Emissions A-Premium APCCT779
$387.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2021 Toyota 4Runner
Item LocatedUnited States
Quantity1
Installation PositionFront Left Driver Side
ColorNatural
Part interchange
41150, 641515, 674-304, 674304
ConditionNew
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Front Passenger Catalytic Converter
A-Premium®
1-PC Catalytic Converter Front Right Passenger Side Fit Federal Emissions A-Premium APCCT781
$387.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2021 Toyota 4Runner
Item LocatedUnited States
Quantity1
Installation PositionFront Right Passenger Side
ColorNatural
Part interchange
16682, 41151, 641516, 674-305, 674305
ConditionNew
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Rear Driver Catalytic Converter
A-Premium®
1-PC Catalytic Converter Rear Left Driver Side Fit Federal Emissions A-Premium APCCT792
$335.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2021 Toyota 4Runner
Item LocatedUnited States
Quantity1
Installation PositionRear Left Driver Side
ColorNatural
Part interchange
644051
ConditionNew
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Rear Passenger Catalytic Converter
A-Premium®
1-PC Catalytic Converter Rear Right Passenger Side Fit Federal Emissions A-Premium APCCT791
$245.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2021 Toyota 4Runner
Item LocatedUnited States
Quantity1
Installation PositionRear Right Passenger Side
Part interchange
50396, 644050
ConditionNew
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2 Pcs Rear Catalytic Converter
A-Premium®
2-PC Catalytic Converter Rear Side Fit Federal Emissions A-Premium APCCT793
$503.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2021 Toyota 4Runner
Item LocatedUnited States
Quantity2
Installation PositionRear Side
Part interchange
50396, 644050, 644051
ConditionNew
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AP Emissions 608414 Catalytic Converter
AP Emissions
AP Emissions 608414 Catalytic Converter
$156.99
Quantity Less than 4
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2021 Toyota 4Runner
Item LocatedUnited States
Quantity1
Part interchange
608414
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AP Emissions 608415 Catalytic Converter
AP Emissions
AP Emissions 608415 Catalytic Converter
$148.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2021 Toyota 4Runner
Item LocatedUnited States
Quantity1
Part interchange
608415
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AP Emissions 9216 Catalytic Converter
AP Emissions
AP Emissions 9216 Catalytic Converter
$32.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2021 Toyota 4Runner
Item LocatedUnited States
Quantity1
Part interchange
9216
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Eastern Catalytic 41204 Catalytic Converter, Rear Right Passenger Side
Eastern Catalytic
Eastern Catalytic 41204 Catalytic Converter, Rear Right Passenger Side
$544.99
Only 1 item left in stock
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2021 Toyota 4Runner
Item LocatedUnited States
Quantity1
Installation PositionRear Right
Part interchange
41204
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Catalytic Converter - Walker 15034
Walker
Walker 15034 Catalytic Converter, Exhaust
$167.99
Quantity Less than 5
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2021 Toyota 4Runner
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
15034, SC207, 602507, 6007, 602007, 70430, SC217, 6507
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Catalytic Converter - Walker 15039
Walker
Walker 15039 Catalytic Converter, Exhaust
$150.99
Quantity Less than 4
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2021 Toyota 4Runner
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
15039, 602207, 94109, 83167, 6907, 93167, 70330, 94009, 
...View more
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Catalytic Converter - Walker 15104
Walker
Walker 15104 Catalytic Converter, Exhaust
$269.99
Only 1 item left in stock
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2021 Toyota 4Runner
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
15104, 641211, 92624, 82624
Show less

A catalytic converter, often referred to as a "cat," is an essential component of your engine's exhaust system. This device uses catalysts to transform harmful chemicals in the exhaust gases.

What are the signs of a bad catalytic converter?

  • Check engine light
    The dashboard warning light may illuminate, indicating potential issues.
  • Decreased engine performance
    Noticeable loss of power, acceleration, or overall engine performance.
  • Poor fuel economy
    A significant drop in fuel efficiency can occur as the converter fails.
  • Excessive exhaust emissions
    Increased emissions, including a strong sulfur or rotten egg smell.
  • Rattling noises
    Unusual rattling sounds from the exhaust system, indicating internal damage.
  • Overheating
    The engine may run hotter than normal due to restricted exhaust flow.
  • Failed emissions test
    Inability to pass emissions testing due to high pollution levels.

Shop for aftermarket catalytic converters on A-Premium.com

Premium.com offers a wide range of aftermarket catalytic converters for your vehicle. Refine your search by selecting from various dimensions, inlet types, and tube materials. A-Premium team is dedicated to helping you find a compatible catalytic converter for your car. Every item in our catalog is carefully selected by our team of experts, ensuring they undergo rigorous quality checks to endure the demanding conditions of your exhaust system. Shop now to find the best deal on your new catalytic converter!