HomeExhaust > Catalytic ConverterAP Exhaust 644151 Catalytic Converter
Part #: 644151

AP Exhaust 644151 Catalytic Converter

⚙️ 18 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Volkswagen, Beetle, Jetta, and Passat
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AP Exhaust Catalytic Converter for Volkswagen Vehicles

The AP Exhaust 644151 catalytic converter is designed specifically for Volkswagen Beetle, Jetta, and Passat models. Engineered with durable stainless steel and a ceramic substrate, this federal/EPA direct-fit converter ensures compliance with emissions standards while maintaining reliable performance.

  • Constructed from corrosion-resistant stainless steel body
  • Includes one clamp and one inlet gasket for secure sealing
  • Features a V-band flange inlet and 2.36" outside diameter slip fit outlet
  • Equipped with one O2 sensor port for accurate emissions monitoring
  • Overall length of 66 inches for precise fitment
  • Ceramic substrate designed for effective catalytic conversion
  • Federal/EPA direct-fit type for Volkswagen Beetle, Jetta, and Passat

Durable Construction and Precise Fitment

The AP Exhaust catalytic converter part number 644151 is built with a stainless steel body that resists rust and corrosion, extending the life of the exhaust component. Its ceramic substrate efficiently converts harmful exhaust gases into less harmful emissions, meeting federal and EPA regulations. The V-band flange inlet and 2.36" OD slip fit outlet provide a secure and leak-free connection to the vehicle's exhaust system. This converter includes one O2 sensor port to accommodate factory oxygen sensors, ensuring proper engine management and emissions control.

Compatible Volkswagen Models

This catalytic converter is compatible with Volkswagen Beetle, Jetta, and Passat models, making it a direct-fit replacement for these vehicles. The part number 644151 is designed to match OEM specifications, simplifying installation and maintaining factory performance standards.

Common Applications and Issues Addressed

  • Replacement for clogged or damaged catalytic converters
  • Restores proper emissions control to pass state inspections
  • Resolves check engine light issues related to catalytic converter failure
  • Improves exhaust flow and engine efficiency
  • Ensures compliance with federal and EPA emissions regulations

Installation Notes and Tips

Installation requires removal of the existing catalytic converter and proper alignment of the V-band flange inlet and slip fit outlet. The included clamp and inlet gasket should be used to ensure a secure, leak-free connection. No additional inlet or outlet hardware is included, so verify compatibility with your vehicle’s exhaust system components before installation. Proper torque specifications should be followed to avoid exhaust leaks.

Quality Assurance and Warranty

AP Exhaust catalytic converters are manufactured to meet federal and EPA standards for emissions control. The stainless steel construction and ceramic substrate provide durability and long service life. Warranty information is available from the manufacturer and should be reviewed prior to purchase to understand coverage details.

BrandAP Exhaust
Part Number644151
Body MaterialStainless steel
Clamp Qty1
Inlet Gasket Qty1
Inlet HardwareNone
Inlet Type AV-band flange
O2 Sensor Ports1
Outlet Gasket QtyNone
Outlet HardwareNone
Outlet Type A2.36" od slip fit
Overall Length (IN)66
Substrate MaterialCeramic
TypeFederal / epa direct-fit

This part fits 18 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2018VolkswagenJetta2.0LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2018VolkswagenJetta1.8LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2017VolkswagenBeetle1.8LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2017VolkswagenJetta2.0LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2017VolkswagenJetta1.8LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2017VolkswagenPassat1.8LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2016VolkswagenBeetle1.8LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2016VolkswagenJetta2.0LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2016VolkswagenJetta1.8LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2016VolkswagenPassat1.8LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2015VolkswagenBeetle1.8LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2015VolkswagenJetta2.0LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2015VolkswagenJetta1.8LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2015VolkswagenPassat1.8LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2014VolkswagenBeetle1.8LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2014VolkswagenJetta2.0LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2014VolkswagenJetta1.8LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2014VolkswagenPassat1.8LL4N/ADirect Fit; SULEV Emissions; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

5C0254501

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.