Subaru Foresters (2014-2022) are high-frequency targets for catalytic converter theft due to their accessible ride height and valuable PZEV-grade precious metals.
Reviewed by SubaruReview Editorial Team · Last reviewed 2026-05-15 · Editorial standards
How this problem ranks against the other documented Forester failures — cost, severity, and DIY difficulty at a glance.
| Problem | Years | Severity | Repair cost | DIY |
|---|---|---|---|---|
| Subaru Forester Catalytic Converter Theft & Exhaust Damage (this page) | 2014-2022 | Major | $1,800–$3,500 | 3/5 |
| Knock Sensor Failure (P0328) | 1999-2008 | Major | $200–$400 | 4/5 |
This is one of several documented Forester problems we track, and it fits inside the broader Reliability & Common Problems guide. If you're weighing repair against replacement, cross-check the Subaru repair-cost database and any open NHTSA recalls on your VIN before booking a shop.
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.
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.
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.
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.
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.
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
Owners typically pay $1,800–$3,500 at an independent Subaru shop, parts and labor included. Our Subaru Oxygen Sensor Replacement Cost guide breaks the job down by parts, labor hours, and where the money actually goes.
The same generation also sees Knock Sensor Failure (P0328). Both are documented with symptoms, cost, and a permanent-fix walkthrough — see the full list in the Forester hub.
We rate it 3/5 on our DIY scale. Confident wrenchers can tackle it in a weekend using the permanent-fix steps above. Cross-reference the reliability & common problems hub for related jobs worth bundling while you're in there.
Dig into the Problems Database to plan your next maintenance sprint, or browse every model hub for buyer's guides, generation breakdowns, and known-issue lists.