AP Exhaust 644009 Catalytic Converter - Rear
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AP Exhaust

AP Exhaust 644009 Catalytic Converter - Rear

Brand AP Exhaust 644009
Position Rear
Body Material Stainless steel
Inlet Gasket Not required
Inlet Hardware None
Inlet Type A 3.11" flare
O2 Sensor Ports None
Outlet Gasket Not required
Outlet Hardware Yes
Outlet Type A 2.05" od pipe
Overall Length (IN) 43.5
Substrate Material Ceramic
Type Federal / epa direct-fit
Fits Mini · 4 vehicles

Direct-fit replacement. Built to exact OE dimensions for straightforward installation.

Ceramic substrate. Proprietary chemistry promotes efficient converter performance.

Stainless steel body. Resists corrosion for long-term exhaust durability.

$601.97Free shipping
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AP Exhaust 644009 Catalytic Converter for Mini Cooper

AP Exhaust 644009 is a Federal / EPA direct-fit catalytic converter built for rear placement on select 2007-2009 Mini Cooper models. It uses a stainless steel body, a ceramic substrate, and OE-style dimensions to support proper exhaust routing and factory-style fitment.

Compatible with 2007-2009 Mini Cooper rear applications, this converter is built to match the original installation layout and exhaust connection points. The AP Exhaust 644009 is a direct-fit replacement for drivers needing a rear catalytic converter for Mini Cooper emissions service.

Key Features

  • Federal / EPA direct-fit catalytic converter
  • Fits 2007-2009 Mini Cooper, rear
  • Stainless steel body for exhaust system durability
  • Ceramic substrate material
  • 3.11" flare inlet type A
  • 2.05" OD pipe outlet type A
  • Overall length: 43.5 inches
  • No O2 sensor ports
  • Outlet hardware included; inlet gasket not required

Product Details

AP Exhaust part number 644009 uses ARISTO substrate chemistry and modern manufacturing methods to produce a converter with efficient loading and OE-style dimensions. The result is a rear catalytic converter for Mini Cooper applications that follows the original fitment profile while supporting emissions system service requirements. AP Exhaust 644009 is engineered for 2007-2009 Mini Cooper rear installation and is listed for Federal and California emissions configurations, with state-use restrictions noted by the manufacturer.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Issues It May Address

  • Failed rear catalytic converter on a 2007-2009 Mini Cooper
  • Exhaust restriction caused by a deteriorated substrate
  • Emissions test failure related to converter efficiency
  • Exhaust leaks at the converter connection points
  • Fitment problems from a non-direct replacement part

Installation Notes

Fits 2007-2009 Mini Cooper, rear. Verify the vehicle’s emissions requirements before installation, since the manufacturer notes restrictions for vehicles licensed in CA, CO, ME, and NY. Confirm the inlet flare and outlet pipe dimensions against the existing exhaust system before installation. No O2 sensor ports are provided, so the vehicle configuration should be checked before ordering.

Quality Assurance

AP Exhaust uses automated workstations, spinner welding equipment, and high-speed production lines to build converters to exact OE dimensions and fitment. The 644009 is manufactured as a Federal / EPA direct-fit catalytic converter with stainless steel construction and a ceramic substrate for consistent replacement quality.

Related reading

This part fits 4 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelBody TypeLitersCylindersPositionNotes
2009MiniCooperSConvertible1.6LL4RearDirect Fit; 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.
2009MiniCooperSHatchback1.6LL4RearDirect Fit; 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.
2008MiniCooperSHatchback1.6LL4RearDirect Fit; 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.
2007MiniCooperSHatchback1.6LL4RearDirect Fit; 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.