Subaru Forester Catalytic Converter Theft & Exhaust Damage
Subaru Foresters (2014-2022) are high-frequency targets for catalytic converter theft due to their accessible ride height and valuable PZEV-grade precious metals.
Last updated: 2026-05-15
What goes wrong
Thieves use battery-powered saws to cut the exhaust pipe before and after the catalytic converter, often severing oxygen sensor wires and damaging adjacent heat shields in the process. This leaves the vehicle with an open exhaust, making it illegal and dangerous to drive due to noise and carbon monoxide risks.
Symptoms to watch for
- Extremely loud roaring or screaming noise upon engine start-up
- Strong smell of exhaust fumes inside the cabin
- Check Engine Light (CEL) illuminated with codes P0420 or P0137/P0138
- Rough idling or engine hesitation during acceleration
- Visual evidence of jagged exhaust pipe cuts underneath the vehicle
Root cause
High ground clearance of the Forester platform allows easy access for thieves to use reciprocating saws, targeting the high concentrations of Rhodium, Palladium, and Platinum found in Subaru PZEV emission systems.
Buy time with these
- • Install a precision-cut catalytic converter anti-theft shield (Cat Security or MillerCat)
- • Engrave the VIN onto the converter body and spray with high-temp orange paint
- • Adjust car alarm sensitivity to detect vibrations from sawing
- • Park in well-lit areas or garages whenever possible
Permanent fix
- Replacement of the stolen catalytic converter unit with an OEM or high-quality EPA-compliant aftermarket unit, coupled with a bolt-on steel security plate.
Related recalls / TSBs
FAQ
What causes subaru forester catalytic converter theft & exhaust damage?
High ground clearance of the Forester platform allows easy access for thieves to use reciprocating saws, targeting the high concentrations of Rhodium, Palladium, and Platinum found in Subaru PZEV emission systems.
How much does it cost to fix?
National average $1,800–$3,500. OEM replacements for PZEV (Partial Zero Emission Vehicle) Foresters are significantly more expensive due to precious metal content. Labor typically ranges from $200-$400, but can increase if oxygen sensor wiring harnesses were severed.
Is this a DIY repair?
Difficulty 3/5. Replacement of the stolen catalytic converter unit with an OEM or high-quality EPA-compliant aftermarket unit, coupled with a bolt-on steel security plate.
What are the symptoms?
Extremely loud roaring or screaming noise upon engine start-up; Strong smell of exhaust fumes inside the cabin; Check Engine Light (CEL) illuminated with codes P0420 or P0137/P0138; Rough idling or engine hesitation during acceleration; Visual evidence of jagged exhaust pipe cuts underneath the vehicle