Also check the spark plugs, sometimes people are cheap and buy autolites instead of NGK. Cheap plugs from previous owner give me a headache.
Cons: cheap plugs headache
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NGK FR6AHX-S 94279
Part number: FR6AHX-S 94279
NGK Laser iridium. Buy from a real distributor like Rock Auto.
I went with NGK plugs and coil packs at about 95k miles on my 2.5. I'm about 40k miles later and. It's still running great.
Pros: still running great
Vehicle:
Volkswagen
Mileage: 95000 km
I had plugs from Amazon ngk and I had a wicked misfire couple days after. Somehow the ceramic broke off.
Cons: wicked misfire, ceramic broke
We have tested a handful of plugs and wires (not the Chinese knock off stuff, but big name “Proformance” ones) and from a dyno stand point, looking at HP and TQ specifically… none of the wires out performed the stock AC Delco wires and the plugs all were real close to the same with AC Delco being close to the bottom and NGK being toward the top but negligible differences.
Pros: HP and TQ tested
Cons: negligible differences
On a 2.0T it's pretty darn easy. The Gen 3+ engines have the bolted down coil packs with the ground wires/nuts, which can be tricky. You might need to counter hold with a thin style wrench, but other than that it's fairly straight forwards. I'd be sure to use only legit plugs from reputable sellers--there are a surprising number of counterfeit NGK (and Bosch and Denso) plugs out there. Fake plugs can cause more than just pesky misfires too, they can break off in-chamber and cause catastrophic engine and/or turbo charger damage. Not worth it to save a few bucks and potentially end up in ruin. NGK are the OE most of the time so getting the Laser Platinum or Ruthenium HX are recommended. Whether or not you want to replace the coils is up to you. I'd say it's too new for that and if you don't have a ton of miles on it, probably not necessary. The spark plug interval on these engines is comically short too--I'm not sure why VAG does that but they do that across the board on their engines. The original plugs will go for 2x the specified interval without any issue at all. If you are not super high miles and you pull them out and see "they look just fine"? Don't be surprised because they probably *will* be just fine. That said if you're still under warranty (base or extended), change them as specified.
Pros: legit plugs recommended, original plugs last long
Cons: counterfeit plugs dangerous, short interval specified
yup those are done.
the center electode is worn flat and the gap is way too wide.
just replace them. make sure yu use the specified NGK or Denso Iridium plugs.
Pros: replace them
Cons: worn flat, gap wide
Yes, they have a lot of buildup and deposits. Make sure you get that exact spark plug again same brand everything don't put anything other than the NGK that originally came with
Pros: exact spark plug again
Cons: lot of buildup, deposits
Vehicle:
Audi
Fairly easy to do,ive seen this plugs go past 150k honda tech here.
Pros: easy to do
Mileage: 150000 km
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