FRSure

Did they fix the problem in the 2014 IS250 model?

shadowman

iTrader: (2)

Most likely not as they still have the same engine as the previous 2nd generation.

From 2016 and up, they used a different engine with turbo so the model designation became IS200t

swass

Can anyone with 2011+ models update this thread about the carbon issues that may have come up, and at how many miles?

emcauto

interested in the above question as well? thank you

Arrta

Question on the "9 year" warranty extension. My manufacture date is Nov 2007 (its a 2008 model year), not sure on the sale date.
Car had 69k on it when I bought it, and now has 95k on it. In those miles, I have had the hard idle/shimmy twice at stoplights. Never had a CEL for it though.
I recently did a sparkplug replacement and while I had the top opened I sprayed some seafoam inside. After I put it back together I did a seafoam treatment through the vacuum lines. It had some misfires during/shortly after the treatment, generated a cylinder 1 CEL and once even a random misfire code, but shutting her off an restarting caused them to go away and I have had no evidence of any issues in the past few weeks while driving. I'll probably need a walnut blast at some point if I keep it. But my question is about the actual 9 year cut off.
Is it at 9th year from sale date, or are you still covered through year 9 until the 10th "birthday"? If so I got 6 months, if not I'm 6 months over, which sucks.
Also, has anyone had luck getting Lexus to cover it by writing a letter, just in case I do need it?

IWasHungry

Has anybody had success convincing Lexus to cover L-SB-0029-10 on a 2010 or newer IS250?

My 2010 IS250 AWD w/ 80k's VIN is just new enough to not be covered by L-SB-0029-10 and I haven't experienced rough idle yet, but wanted to get the engine cleaned and install a catch can before issues begin.

I'll try to convince Lexus to pay for it in the next couple of weeks, wish me luck

iJHolmes

I just bought an 07 is250 with 193k miles (picked it up for 4K great condition, I thought why not. How often do you have to worry about the build up on the 250?

Kikiwhanki

I hate the carbon build up our Lexus IS is always having. Apart from that, it's a smooth ride! But i learnt that these cars dont need you to pamper them on the high way, drive the hell out of it so all the build up can melt away while it is hot. Mine is yet to build up carbon though, just did about 1,300KM(807.7825 Miles) journey and still fine like wine. Strength of a V6!

ssgpate

Carbon build up is going to happen with direct injection.. Ive read some crazy stuff in here such as going WOT to reduce or burn off carbon.....Carbon in simple terms is like a bad stain that wont come off by introducing WOT pressures over the valves and in the cylinders. If the heat our engines produced would also clean them then they would never get dirty so a little extra heat will not help either.. Do not be out blowing the wheels off your car going wide open throttle thinking this will help because it will not. Going WOT is just introducing more oily air over the valves at a faster rate.. Its not going to MELT off anything or do anything productive for you..

Install a properly designed catch can this will REDUCE the amount of oil going over the valves and extend the intervals in between valves cleanings.

If you like your car have it walnut blasted every so often and forget about it... Walnut blasting will completely remove all deposits and give you a like new surface which will make the car run great. Running cleaners through will not clean off all the carbon its just putting a band aid on it and waste money. Ive tried all the cleaners and the volume of cleaners you would need to run over the valves to actually get them clean and not BANDAID them would not be worth the effort and expense. Letting the valves soak over night is an option but then again this would take you a couple days because all the valves cannot be closed at the same time to keep the fluid in them to soak which is why I recommend walnut blasting.

IWasHungry

No luck getting dealership to help pay for top engine cleaning, it ended up costing me 800. I also replaced the oil with some 5W-20 synthetic Amsoil (don't know what oil was used before- just got the car)
Engine feels a little more powerful/responsive now, even sounds slightly different. Too early to say if mileage is affected, but I was getting 18-22mpg before which is pretty low for an AWD IS250.

The service rep at the Lexus dealership recommended occasional hard driving, good quality gas, and occasional engine/injector cleaner in the gas to reduce carbon build-up. He also said to get a top engine cleaning every 30-50k.

sktn77a

iTrader: (2)

Were you experiencing any issues with the car?

IWasHungry

Some RPM floating when idling after a long drive and an occasional heavy vibration/small shudder.

Reading around it seemed like a good idea to get the engine cleaned to prevent more serious problems.

chrismcnie

I called Lexus Canada and they have no information on this WAB. Everything I see says this coverage was for the US only. Could you give me more information?

Thanks,

Chris

panda327

iTrader: (3)

Lexus Canada will not acknowledge this. You have to push hard at dealerships. Then they will make you go through oil tests for another 6-8 months. At the end of it, they'll say that your oil consumption is within range, then thats when you have to raise your voice a bit, then they'll do it.

MxdMenace

Hi CL!

3IS owner here with a 205 IS250. Exact same symptoms as the older IS’s and the dealership cannot understand what is happening.

Any other 3IS 250 owners here experiencing the same issue? Vehicle has 70k km (Canada) and all plugs and packs replaced. Issue still comes up (p306)