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2003 Mercury Mountaineer Catalytic Converter

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Catalytic Converter - Walker 93271Catalytic Converter - Walker 93271
Walker
Walker 93271 Catalytic Converter, Exhaust
$158.99
Quantity Less than 2
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
93271, 608435, 608286, 51655, 99655HM, 78124, 79124, 81255
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Catalytic Converter - Walker 93302
Walker
Walker 93302 Catalytic Converter, Exhaust
$219.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
93302, 79917, 51505, 51555, 8005, 608224, 95285, 71317, 
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Catalytic Converter - Walker 93270
Walker
Walker 93270 Catalytic Converter, Exhaust
$192.99
Quantity Less than 2
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
93270, 51654, 99654HM, 608204, 82363
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Catalytic Converter - Walker 93237
Walker
Walker 93237 Catalytic Converter, Exhaust
$168.99
Quantity Less than 4
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
93237, 6605, 6803, 51105, 6905, 608405, 609004, 70954, 
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Catalytic Converter - Walker 93238
Walker
Walker 93238 Catalytic Converter, Exhaust
$170.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
93238, 93166, 6606, 89516, 70955, 2576, 608240, 99106HM, 
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Catalytic Converter - Walker 83402
Walker
Walker 83402 Catalytic Converter, Exhaust
$319.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
83402, 910004, 443105
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Catalytic Converter - Walker 83403
Walker
Walker 83403 Catalytic Converter, Exhaust
$324.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
83403
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Catalytic Converter - Walker 83509
Walker
Walker 83509 Catalytic Converter, Exhaust
$421.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
83509
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Catalytic Converter - Walker 93247
Walker
Walker 93247 Catalytic Converter, Exhaust
$189.99
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: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
93247, 93425, 602295, 99175HM, 83425, 70343
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Catalytic Converter - Walker 81924
Walker
Walker 81924 Catalytic Converter, Exhaust
$912.99
Quantity Less than 3
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
81924
Show less
Catalytic Converter - Walker 81722
Walker
Walker 81722 Catalytic Converter, Exhaust
$1,001.99
Quantity Less than 4
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
81722
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Catalytic Converter - Walker 81723
Walker
Walker 81723 Catalytic Converter, Exhaust
$981.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
81723
Show less
Catalytic Converter - Walker 50545
Walker
Walker 50545 Catalytic Converter, Exhaust
$700.99
Quantity Less than 2
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
50545, 49575, 919112, 079-4165, 3L2Z5F250AA, 4L2Z5F250FA, 30447, 93372, 
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Catalytic Converter - Rear Side - Walker 53500
Walker
Walker 53500 Catalytic Converter, Rear Side
$527.99
Quantity Less than 2
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionRear
Part interchange
53500, 919244, 1L2Z5E212AB, 645219, 4L2Z5E212A, 079-4172, 9244, 49400, 
...View more
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Catalytic Converter - Walker 15104
Walker
Walker 15104 Catalytic Converter, Exhaust
$269.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
15104, 641211, 92624, 82624
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Catalytic Converter - Walker 83574
Walker
Walker 83574 Catalytic Converter, Exhaust
$1,798.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
83574
Show less
Catalytic Converter - Walker 81942
Walker
Walker 81942 Catalytic Converter, Exhaust
$2,330.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
81942, 919112
Show less
Catalytic Converter - Walker 16139
Walker
Walker 16139 Catalytic Converter, Exhaust
$1,047.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 Mercury Mountaineer
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
16139, 2L2Z5F250EA, 93108, 912173, 4L2Z5F250GA, 9173, 30454, 2L2Z5F250CA, 
...View more
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Page 3 of 3

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!