Spark plug Bosch or OEM BMW

Bosch W6DPO. They’ve always been expensive, but now stupidly so. I’m not paying $250 for plugs, either. The DENSO IW20TT you referenced is a perfect replacement because it’s the exact same heat range as the W6DPO.

That said, make sure they use quality parts. BMW/Bosch spark plugs and OEM pulleys (and belt) are a must. NGK plugs are cheaper and don\u2019t last as long. Same goes for off-brand belts and pulleys.

Went with Bosh double platinum plugs at 60,000km when I notice a stumble at idle and that's the interval for change. I instantly went from best of 9.6L/100km to 7.8L/100km big difference in performance and smoothness and i prefer a German plug in a German car with Bosch electronics.

I'd stick with the WR6DPO Bosch. Not sure why but they just work with no questions.

Bosch Plugs are tops in any application you use them for... All of their parts are worth what you pay for them...I've...\"NEVER\" had a Bosch part of any kind to fail at its applied usage...! True top of the line German Engineering... period...!!!!!!

If you are willing to put some money into it before resorting to drastic measures, try replacing all 6 of your spark plugs and ignition coils. Might help in your case, or it might not.

I went with OE ignition coils and bosch spark plugs and the misfire went away for a couple days but came back on my drive to school.

BMW 116i. Over the course of a year,

New spark plugs

New ignition coil

New rocker cover

New water pump

New air filter

New cabin filter

New oil filter

New oil

New water pump tensioner and pulley

ECU flash

New battery

New wheel speed sensor

Neither, I’ve seen Bosch plugs fall apart and I wouldn’t trust autolite on my lawnmower.

Installed new Bosch Plugs (WR7DC+), Bosch Distributor Cap, and Rotor. Now the car seems to be having a weird idle sitting as stop lights, and the engine almost shut off while I was backing into the garage. Also she seems like its having a harder time sterting up as well.