Bosch7431 OE Fine Wire Double Iridium Spark Plug - Pack of 10

The one that Amazon.com sells (as the seller) is made in China while I got two others from a different seller here which are made in Germany. You can tell the quality is far different from the look and feel of the material used for them. I doubt the one that Amazon.com sells is authentic.

DON'T BUT THESE PLUGSI bought 6 of the (Bosch 9609 Double Iridium Spark Plug, Up to 4X Longer Life )They are made in CHINA not Germany... But I went to Autozone and apparently the ones that they sell are made in China as well. (I guess everything is these days) Everything looked identical, the packaging the blue writing the "Made in China" marking on the plugs ....EXCEPT the gap and the tips looked different!!! Much different! The Bosch plugs from Amazon look very cheap on the tips and the needle part is significantly smaller then the other. The gap portion looks much cheaper quality of metal then the one from Autozone... I just bought them from Autozone for about $7 each + they had a $10 mail in rebate going on until 3/4/19 $10 if you buy 4. So all and all it still works out. I WILL BE RETURNING THESE CHEAP KNOCKOFFS BACK TO AMAZON ASAP.

Too bad to tell this, I bought 6, half of them just failed in 3 days, see the picture below, I finally put DENZOs paying 2 times technician for the same job, postponed holidays and I put my whole family in danger hit the road with my Town & Country 3 cylinders left... unbelievable bad experience ! One of the spark just broke in half during normal installation, the dealer said spark should be faulty and I argued with him, as I had no time waiting for another I put one of the old spark, then 3 days after when my engine light come up, error code 301 & 306.... then i found hte 2nd and 3rd sparks in the picture, has no iridium left ! they had loosened sticks, you can move the central part up and down!Finally when I claim redound they want me mail back the spark with original packaging !! I got even more upset they want olny refound me the 5 except the broken one.

I bought 6 of these plugs for my 2013 BMW X3 35i. My vehicle was running just fine, but I decided that I wanted to do some preventative maintenance, so I installed them. After driving 20 miles, I realized my vehicle had a misfire, which I could feel while waiting at a red light. As I took off, I didn't really feel it again until I got to the next red light, and the misfiring got worse. From there, I headed home, and by the time I got there, my vehicle was in limp mode. My OBD scanner showed failure in cylinder #4, so I pulled the plug out, replaced with an old plug - misfire gone. I put the new plug back in, and the misfire returned. BAD PLUG. So, I stuck with the old plug in #4 and figured I was fine while waiting for a new plug to deliver. I drove about 50 miles from my home, and realized the misfire was back. Unfortunately, I was too far from home to get back, and my vehicle was in full limp mode, so I had to get a tow to the BMW dealer. After 2 days of not having a vehicle, the dealer told me #6 plug was no good and needed to be replaced. I told the mechanic the story, and he recommended replacing all of them with genuine BMW plugs - $1230 after tow, labor, and parts, which I ended up doing, just to avoid being stranded again anytime soon.Ultimately, I think these plugs are maybe fine, but I bought mine from marketplace seller European Parts Haus, and I question whether they were authentic. I spoke with Bosch and was informed that European Parts Haus is not an authorized Bosch dealer on Amazon, so who knows where they got the plugs from and if they're even new. Bosch advised that it's entirely possible that European Parts Haus bought plugs that had been previously returned to Bosch due to defect or dropped product, which causes failure. From there, if they're reselling on Amazon, they're unauthorized to do so, but Amazon doesn't control sellers and what their authorization is. My recommendation is to buy these only from Amazon, not from other sellers on Amazon.

Not much to say except for that the spark plug broke in half when torquing to specification. I thought i was going to have to remove the head to get this fixed, fortunately it came out using other methods.Other than that these spark plugs work as intended, if you don't receive a faulty one.

I installed these in my 2002 Ford Ranger XLT 4.0LI was so pleased with the performance, my truck was zipping around with power I've never felt before.After 4 days without issue, I started up the truck to go to work one morning and it ran like absolute garbage. Anything below 1k RPM shook the truck like a massage chair. Clearly one or more of my plugs were not firing.I checked the plug wire connections and made sure everything was seated properly. That did not help.Next I tried removing wire boots one at a time to single out the none firing cylinder.On the passenger side, I tugged on the middle boot and the porcelain bit came with it, still stuck inside the boot!Why on earth did this happen overnight? It's unheard of. Why would the truck run fine after installing them, then crap out? I'm still puzzled.I ended up swapping these out for double plat Motorcraft plugs, and so far I haven't had issues.Still pissed I had to do this grueling 4 hour job TWICE!

I put these in my Ford Econoline and for reasons I'm not yet sure of, a majority of them failed. They worked just fine for a couple weeks but then one morning my van wouldn't start. I couldn't believe it was the plugs so I spent a lot of time checking everything else - until I finally pulled one of the plugs and found it wasn't sparking. I replaced them with a set of AC Delcos and the problem went away. Very strange and I won't get these ever again.

Clearly, this listing says “a pack of 4”. The packing list accompanying this says likewise, a pack of 4. Let's assume this is an honest mistake. I see other reviews and I think one response from the seller that says these are PER spark plug prices. Yet, the seller cannot see fit to revise the listing description. If you’re reading this review, and it’s still listed as a pack of 4, just buy them somewhere else so as not to be surprised and irritated.

Gives a great spark and my car starts first time (no lag or delay) and my car seems to run better at higher revs (better response). Obviously the fact they are iridium means a longer life span which means cheaper in long run. So I fully recommend you find a great deal on Amazon. Many thanks Bosch + Amazon

Works as it should, however the packaging it came in was a flimsy envelope, No protection for theses plugs, luckily none were damaged and they all work really well, my car BMW320i e46 loves these plugs, more responsive and runs nice and smooth.

It's very difficult to write a review on spark plugs, as its the type of product that is fitted and ignored or forgotten. All I can say is that the difference to have a new set of plugs fitted compared to those old plugs that have been coughing and spluttering over time, can be noticeable, and your Car will thank you for renewing them, maybe a few more miles to the gallon and less hiccups?. My only suggestion is to stick with a good quality plug such as Bosch, as they will outlive cheaper versions.

The product works well. I bought it for my VW Golf MK 4 and it fits my car well. I recommend this product.

I bought these spark plugs for my poorly BMW. The spark plugs work perfectly and excellent value for money. My car is now healthy and I really loved how quick they make my car. Well packaged and delivered on time. Thank you