I'd say it's one of the hardest vs. all of the vehicles I've owned. Chevy Small Block and LS are extremely easy in most vehicles. Inline 4 engines are a piece of cake. A transverse mounted V6 will always be more difficult due to the rear bank. This doesn't mean impossible, it just means difficult compared to other vehicles.Difficult???? WTH - I was able to change all 6 plugs in 1-2 hours. It's not difficult and if you remove the intake it's much easier and even that is easy peasy. I have to admit, this is one of the easiest cars I've ever changed plugs on.
I don't disagree with the logic, or the logic that worn plugs puts more stress on coils and can cause them to fail so I should replace the plugs. But I've been through a lot of cars over the years and haven't had any issues with either. If I had more time on my hands (yay 3 kids under 7 and a wife in full time school!) I'd be on top of those things but right now I'm having trouble finding the time to do the timing belt on the Pilot since it's 7 years old, let alone finish up the turn signal/upper steering column rebuild on my '61 Impala so I can enjoy it now that it's warm.the way I see it--- plugs and O2 sensors are not setting codes by 100K...
but they do wear. Damage to the catalytic converters can occur.
Here in California... we can only replace cats with OEM. Some folks replace with performance aftermarket- but they have to also be California Air Resources Board (CARB) certified. (they will have a license/permit # welded/stamped on).
We cant use universal type CATS.
When it comes time for our Smog Check- the shops inspect the exhaust system.
Not only that- the gas station close to my house is at $3.95 for regular.
So that means that its a no brainer to keep my plugs and cats in good shape. Keeps my MPGs up and Cats working fine.
I did learn a lesson when I was young. Had a 96 Saturn. I never changed the O2 sensors on it.
2002- to sell the car-owners have to smog the car. I failed smog check. Cant sell the car.
Had to replace O2 sensors (lazy) and the CAT. Umm yeah- expensive. Lesson learned.
Once I sold the Saturn. I got a Trailblazer- 2003.
Still in my driveway. I believe 185,000. I changed O2 sensors on it at 100K I believe. Still passes smog checks.
I was running the fender skirts on the factory hubcaps and redline style tires. But I got a set of 17" chrome rallye wheels that I like better without the skirts. But those tires are pretty gross so I need to get them replaced this year too... I should probably start putting together my powerpoint presentation to the wife about why I should spend money on that car right now...I hear ya... My 70 Monte Carlo (white walls and fender skirts) has been up against the garage wall... and one of the tires up against the wall- has gone flat.... well see how I get it out. But no use getting it out until I get replacement tires with whitewalls.
No arguing with any of that, I just haven't had the issue and the only person I know who's replaced an O2 sensor had the threads strip while removing the old one so he had to take it to a shop to have the threads re-tapped.I'm doing O2 sensors now at 80k as my Tahoe slowly started loosing mpg's at 90k. Changed plugs but they were not too oversized on gaps and no change to mpg. . After doing the O2's got 2 mpg back highway. That's a lot when you only get 18 mpg. . No codes or running issues on the old ones. I believe the sensors slowly degrading had it running richer thus putting more stress on it's expensive CA cats and IMO that is a reason for early cat failures in vehicles that do not have oil burning or misfire issues.
I'd rather spend $80 on new sensors than new CA spec. cats as I'm in NJ and we are CA spec. emissions. Universal cats or Fed. spec. ones will set cat efficiency codes on CA spec. vehicles. Went through that on my brothers Impala when he had a shop replace a cat with a cheaper Fed. spec one and it kept erratically setting codes.
😄😄 You haven’t been driving long.Difficult???? WTH - I was able to change all 6 plugs in 1-2 hours. It's not difficult and if you remove the intake it's much easier and even that is easy peasy. I have to admit, this is one of the easiest cars I've ever changed plugs on.