Catalytic Converter
Catalytic Converter Replacement & Diagnostics
A&A Quick Fix Auto Repair provides catalytic converter replacement and P0420 diagnostics in Brooklyn, NY . We install emissions-certified converters and diagnose the engine problems that killed your old one.
A Check Engine Light for a Catalytic Converter (P0420/P0430) can make you fail NYS Inspection. As a trusted Brooklyn auto repair shop, we install the correct emissions-certified converter for your vehicle and fix the root cause so the new one lasts.
Address: 889 3rd Ave, Brooklyn, NY 11232 • Phone: (347) 345-7681
Failed Emissions Test?
Don’t gamble on cheap parts. Verify emissions certification first.
Mention this page for a free Code Scan with any converter quote.
Symptoms of a Bad Catalytic Converter
Rotten Egg Smell
A strong sulfur smell from the exhaust can mean the catalyst is overheating or breaking down.
Check Engine Light
Codes P0420 (Bank 1) or P0430 (Bank 2) indicate catalyst efficiency issues.
Loss of Power
If the converter is clogged internally, exhaust can’t escape and the engine feels choked.
Rattling Noise
A rattle at idle/acceleration can mean the internal honeycomb has shattered.
Failed Inspection
Emissions readiness and catalyst efficiency issues can cause a NYS inspection failure.
Poor Gas Mileage
A clogged converter can increase fuel usage and reduce engine efficiency.
⚠️ WARNING: The “Amazon Part” Trap
Buying a random converter online can cost you twice. Many units are not emissions-certified for your exact NY application. We verify certification and install the correct converter so you don’t chase P0420 again.
We Don’t Just Swap Parts. We Find the Cause.
Catalytic converters are often damaged by engine problems. Fix the cause or the new one won’t last.
| Cause of Failure | Why It Happens | The Fix |
|---|---|---|
| Oil Consumption | Oil coats the catalyst and reduces efficiency. | Diagnose PCV/valve seals/ring issues before replacement. |
| Engine Misfire | Raw fuel overheats and melts the catalyst. | Fix plugs/coils/injectors before installing a new converter. |
| Coolant Contamination | Coolant in combustion damages catalyst chemistry. | Pressure test and repair leaks first. |
| Running Rich | Too much fuel reduces catalyst efficiency over time. | Test sensors/MAF/fuel pressure and correct fuel trims. |
Common Vehicles with Catalytic Converter Issues
Honda / Acura
P0420: Often needs high-quality emissions-certified parts and correct diagnosis to keep the light off.
Toyota (Prius, Tacoma, Tundra)
Theft target: We can replace and add a cat shield for protection.
Subaru
Front pipe assemblies: Some models require a complete integrated assembly.
Nissan / Infiniti
V6 banks: P0420/P0430 may affect one or both banks depending on testing.
Ford / Lincoln
Multiple converters: Diagnosis identifies which unit is actually failing.
Jeep / Chrysler / Dodge
3.6L Pentastar: Common efficiency codes on higher-mileage vehicles.
Catalytic Converter Service Area
Serving a ~5-mile radius from 11232
We’re at 889 3rd Ave, Brooklyn, NY 11232 in Sunset Park. We regularly service Sunset Park, Bay Ridge, Park Slope, Carroll Gardens, Boerum Hill, Cobble Hill, Gowanus, Red Hook, Borough Park, Greenwood Heights, Williamsburg, and surrounding areas.
Catalytic Converter FAQ
Can I use a cheap catalytic converter from Amazon?
Usually no. Many cheap online parts aren’t emissions-certified for your specific NY application. We verify certification for your vehicle and install the correct converter so you don’t pay twice.
How much does catalytic converter replacement cost in Brooklyn?
Costs vary by vehicle and parts. Many jobs are $800 to $2,500+. We confirm the correct part for your VIN and provide a clear estimate first. Call (347) 345-7681.
What does P0420 mean?
P0420 indicates catalyst efficiency is below threshold (Bank 1). P0430 is Bank 2 on V-engines. Either can affect emissions readiness.
Is it my O2 sensor or the catalytic converter?
Either can cause similar symptoms. We test O2 sensors, check leaks, and graph waveforms before recommending converter replacement.
My catalytic converter was stolen. Can you help?
Yes. We replace stolen units with the correct emissions-certified converter and can install a cat shield for theft prevention.
How long does catalytic converter replacement take?
Most jobs take 2–4 hours once parts are in hand. Some vehicles take longer due to rust, integrated assemblies, or multiple converters.
Where are you located?
We’re at 889 3rd Ave, Brooklyn, NY 11232 in Sunset Park.
Related Services
Trusted by Brooklyn's People
After that experience, I was hesitant to trust another shop until I found A&A Auto Repair which was recommended by my friend. From the moment I walked in, Ali was polite, honest, humble, and respectful. He thoroughly explained what needed to be fixed now and what could wait. I needed brakes, a motor blower replacement, an oil and filter change, and two new tires—and the price he quoted was less than a quarter of what the dealer charged me for far less work.
As a single parent, that honesty and fairness meant everything to me. For the first time, I didn’t feel like I was taken advantage of or or regretful that I did not bring a man w/ me. I felt his hospitality and genuinely respected. He followed up w/ me the very next day to see how the car was working and to reminded me of our next appointment to finish everything off. Ali has earned my trust and will absolutely be my mechanic moving forward 😉 Thank you, Ali. More then you know!!!
See you soon
UPDATE!!!
Once again, Ali and his team are very great mechanic. Our car dodge durango had engine/emission leak problem so as soon as my husband found out my husband went back to Ali yesterday (09/19/25) to fix the new problem of our vehicle. Ali called the parts/supplier right away and was told to come back today 09/20/25. At the same day Ali was able to fix our vehicle right away. Ali and Team I will come back without question if the need ever arises. Thank you for your hard work and generosity. I want to thank you for doing an excellent job repairing my vehicle in a reasonable amount of time, and also for your great service in helping with my situation. Kudos to you and God bless you all. ❤️
Ali sourced the part (for a lot less) and saved us from selling our car and going carless. So grateful! He was quick, friendly and truly helped our family. We found our new mechanic.
Thank you for taking care good of my car
My tire had Two pins. He fixed and changed me $30 . No excuses you have to pay. All around
NYC tire fixed shop first pin $10 Seconds pin $5 .
He charged me $30.
Would highly recommend and will definitely be going back whenever I need my car service again
I was in a little bit of a hurry to get my car repaired before a state inspection. Ali told me to bring my car to his shop and he'd take care of it. He told me up front what cost, time and labor would be. Afterwards he checked my entire car and advised what needed additional repairs. He's honest, reliable and so nice to deal with. I'd definitely commend him to friends and family...
I came from Staten Island to Sunset Part for a brake replacement and oil change, and let me tell you, it was worth it.
Ali is friendly and knowledgeable, and he got the job done quickly without cutting corners.
Reasonable prices and honest work! Couldn’t ask for better service!
A & A Quick Fix Auto Repair in Brooklyn, NY provides top-quality oil change services for a variety of car brands including BMW, Toyota, Honda, and Ford.
Facing brake issues in Brooklyn? A&A Quick Fix offers expert brake pad replacement and repairs. Schedule online for fast, reliable service.
Busted AC in Brooklyn’s heat? That’s more than just uncomfortable, it could be dangerous! Stifling commutes, cranky passengers,
Expert spark plug replacement services in Brooklyn to conquer engine troubles. Schedule now for reliable repairs and smoother driving.
Brooklyn's best transmission repair shop. Schedule now for honest service and upfront pricing.
Radiator trouble in Brooklyn? A&A Quick Fix provides fast, affordable repair. Call for service now.
Whether it’s a serpentine belt issue or a timing belt concern, Brooklyn drivers trust A&A Quick Fix for reliable repairs
Don't let a dead battery ruin your day! Fast, reliable replacement near you.
Does your car jerk or grind while shifting? A&A Quick Fix in Brooklyn is your one-stop shop for affordable clutch repair and fast turnaround.
Don’t let potholes and rough roads ruin your day. A&A Quick Fix offers expert car suspension repair for a smoother, safer ride in Brooklyn.
Axle or CV joint trouble leaves you stranded. Our Brooklyn mechanics offer fast diagnosis, quality repairs, and get you back on the road safely.
Overheating? Strange noises from your engine? A&A Quick Fix offers fast, reliable water pump repair to get you back on the road.