ACDelco GM Original Equipment 41-156 Iridium Spark Plug

Excellent product

These are the real deal AC Delco parts. Exact match of factory installed plugs on 2017 Chevrolet Malibu.

Funcionó perfecto excelente producto

Car runs great after putting them in. I changed only because it was manufactured recommend mileage.

3 out of the 4 spark plugs had the ceramic insulator shatter when installing and I returned them only for the seller to charge back the 3 broken ones. I then spoke with Amazon support and got my money back then the seller charged me again??? Super low quality stuff, idk if it’s from being shipped through Amazon but I am a certified technician and have never seen spark plugs just shatter from installation. Had to be very careful removing the spark plugs from fear of the shattered ceramic insulator pieces falling into the cylinder’s. If I could give these 0 stars I would.

Same make and part # of the plugs that came with the vehicle when new. Manual states to replace at 60k miles even though iridium plugs can go 100k. I don't keep any plugs in a car/truck for more than 3-4 years regardless of how many miles you put on it. You absolutely don't want a frozen plug in your cylinder head!

Does what they were design to do

Be aware that the OEM number has changed on this product. ACDelco changed the OEM number to 41-156. I believe the old number is 41-123. They do not make that number any more. This is the correct spark plug for the 1.4 engines on the Chevy Cruze 2016-17-18. Be warned, the gap was wrong on three of these. Do not install until you check the gap with a spark plug gap gauge. These are supposed to be factor set. I read some other comments, and others had the same issues. Just blows my mind. These should come ready to go. A person with limited experience may end up breaking the needle tip if they don't know what they are doing. The old spark plugs had a circle but flat base where you did not risk breaking the tip when gapping. ACDelco needs to get their stuff together. Overall, they perform as expected. Usually they they claim these spark plugs can go 100,000. Some manufactures claim never need changing. But, I also change them about 50,000. I was a bit late on them this time at 70,000. But I did notice a difference right away. Had more pick up even in the colder temps. The car should run nice in the summer. As I mentioned in my other comment, suprised they make these for people to buy since people are so entitled and lazy they don't keep up with their cars. 'Why would I do that when I can get a new one every 3-5 years.' And that is the attitude why people don't take care of their cars. Then complain about car payments or pollution. The 'green' people complain, but then go buy another car after 3 years causing more pollution from making the car. But I like to keep my cars till they die. And since I have been working on cars for years, unless I get into an accident my cars run forever. So shout out to the people who value their cars and take care of them.