Skip the auto shop - Our mechanics make house calls

Q: Catalytic converter

asked by on

When I bought it they took the front pre cat off...should I buy a new one and install it?

My car has 150999 miles.
My car has an automatic transmission.

The short answer is yes. I’ll assume that the catalyst was taken off because it was damaged. They are expensive parts and many owners choose to replace catalysts with pipes or mufflers, but there are two reasons why that is a bad idea. One, It’s illegal. You’re not permitted to take emission control parts off of your car and in most states, the car will not pass its annual inspection without the cat. The other reason is that without the proper catalysts, the car will present a check engine light and store a trouble code. This may not seem like a big deal, but once the light is on, it’s on so if any other failures occur, you may not have any indication until more damage occurs. The easiest way to deal with this is to contact Your Mechanic to have a technician come to your home or office and install a catalyst for you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Clicking noise under the hood? sounds like bearings..

Hello. The clicking sound that you are hearing may perhaps be related to the operation of your AC compressor. The AC compressor, or more specifically the compressor clutch will make a clicking noise when it is engaging or disengaging. Some...

Q: Would a wheel bearing be making my car sound like it's reving/ humming

The noise you are describing is very characteristic of a failed wheel bearing(s). Wheel bearing failures are surprisingly common but the part is, in fact, subjected to extreme forces even in normal driving. Sometimes just a big impact with a...

Q: What else can I possibly replace!?

This problem seems to have to do with different areas and modules of the vehicle. I would check all the battery to body grounds and the engine to body grounds. You may have to check for loose connections and in...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...