Hi,
Accidentally, I read the article describing the common issues on 4G in the forum. Most of them I have heard already. However "Exhaust valve overlap" makes me terrified.
Acura TL 2009 to 2014 Common Problems - Acurazine in the "Catalytic Converters" section.

Do you guys have any ideas on this?
Is this very serious and need to take into account when car hit around 100,000 miles?

Thanks

 

do you hear your exhaust rattling?

 

catalytic converters do fail! in our J32/J35's, it's usually because of poor fuel. always use the highest octane available.
also, if the engine does eat some parts of the Catalytic converter, just replace the engine. these engines are so plentiful and cheap, you'd be likely up and running again for under $2 grand

I replaced engine in my 2006 TL with a used engine that cose $650 and a local mechanic dropped it in for another $650. $1300 in total! not bad and the car is running exactly like it was before the swap

 

I do not hear. My car has 34000 miles. Catalyst should be ok now?

I am wondering is this a really serious issue? Cause with regard to the description in the article, if the symptom is not realized, it is probably causing the severe damage to engine.

 

so pay attention to if and when you start hearing odd noises then worry about the problem..

 

pull a cat off and inspect.

 

I plan to keep 4g until 200,000 with no problems for testing Honda and Acura reliability~~~. Also love 4G very much.
where is Acura reliability~~~. Annoying

 

with these type of problems, you cant plan for.
I know thats what you are doing by worrying. worrying that the cat may fail.
shit happens, if it fails, catch it before the engine eats it... and if the engine already ate it, replace engine. then keep going strong!

 

I have been driving my 2012 4G for a year and half. I love it. it is my first Honda/Acura product. Honda engine is like a legend to me. also the Honda reliability is being talked about by everybody.

I had a 2005 altima when I was in Graduate school for almost 3 years. it had 155000 miles when I sold it. it had one sensor problem, other than that it was very reliable. I drove it a lot like1500 miles trip to MD in 3 days.
My 4G, in this a year and half, I replaced audio system (buttons were not working intermittently ), I replaced passenger side window switch (window goes reverse with your command). Also hopefully done the TC software update, it is good now.
When I looked at the list of TSB about 4g, I was dizzy. some others, I choose to forget about something like knuckle noise etc. btw transmission filter was replaced, but the noise came back already.

 

After engine replacement, you sold it or kept driving for years?

 

Good grief. How do you sleep at night worrying about what-ifs.

 

Some misinformation that needs to be cleared up!

OEM Cats are ceramic and failure rates are low of the mesh structure failing. The cat usually fails to reduce the harmful emissions thus triggering the CEL.
Aftermarket cats are steel based and failure rates are higher of the structure failing as the material melts and fragments at a lower temp than ceramic. CEL comes on because the material has failed and is not reducing emmissions

The cats fail to reduce emissions because the mesh structure is damaged or coated in carbon and soot. Burning oil and normal combustion byproducts coat the cats over time reducing their efficiency. Using premium fuel to help ensure a proper burn prevents the deposits on the exhaust side of the engine meaning the valves, cats, and pistons!

Beyond just proper fuel, if you are burning oil that carbon has to go somewhere HINT HINT SHAWD TL's! Usually it coats the valves, pistons and cats. Once the cats are coated with all this soot and dirt, they are more prone to having unburnt fuel soak up in them and start glowing as you are fueling the "heat" of the cats. Glowing hot cats obviously mean that the cat is way beyond it's operating range is failing.

 

I'm still driving it!
as stated, it's driving flawlessly.

Dont be scared. dont worry about potential failures, as they may or may not happen.
Good luck

 

remember, cars are machines.

you need to take care of machines and any of their problems that arise.
you cant help if sensors, or cats go out. this is what is known as mechanical or electrical failure. sometimes, shit just stops working. you need to understand this.