Catalytic Converter
hard DIY~2h jobWritten in plain English and reviewed by the eli5cars editorial team · Last reviewed June 2026
What it does
The catalytic converter is your exhaust's air-cleaner. As exhaust passes through, a honeycomb coated in precious metals turns nasty gases into mostly harmless ones. It rarely dies on its own — it usually gets poisoned by an upstream problem like a long-running misfire or oil burning, which clogs or melts the honeycomb. Fix the cause first, or the new converter dies too.
Fix-vs-Skip Money Panel
DIY Cost
~$250
parts only
Shop Cost
~$1,800
parts + labor
Estimates only — real prices vary by region, vehicle, and shop. Updated 2026.
Buy the part
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So what do I do now?
Three honest paths for fixing catalytic converter — pick the one that fits your time, tools, and risk tolerance.
Door 1 — DIY it
We don't have a curated parts/tools list for this repair yet. Based on its hard difficulty rating, this typically needs specialty tools, a lift, or real mechanical experience — most drivers are better off in Door 3.
Door 2 — Buy the part
Already have someone lined up to install it (or handy friend), and just need the part?
Search Catalytic Converter on AmazonHeads up: some links below are affiliate links (including Amazon Associates) — if you buy through them we may earn a small commission at no extra cost to you. Details: /disclosure.
Door 3 — Go to a shop
Fair price band
$1,350–$2,250
parts + labor, typical US pricing
Ask the shop
- Are the parts OEM or aftermarket?
- Is the diagnostic fee waived if I approve the repair?
- Can I get an itemized estimate before you start?
- What warranty do you offer on the labor?
Frequently asked questions
Why did my catalytic converter fail?
Almost always because of another problem: a misfire (bad spark plugs/coils), burning oil, or a rich fuel mixture dumping raw fuel into the exhaust. Fix that root cause or the replacement will fail again.
Can I just delete or gut it?
No. Removing or gutting a catalytic converter is illegal for street use in the US and will fail emissions testing. Replace it with a compliant unit.