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Is this any good? 200 bucks. One of mine is going bad. I thought it would be cheaper and better to replace all of them instead of taking it to the shop. 2001 F250 5.4
These Denso's are $24 a piece through Rock Auto and a much better quality. OEM in fact, another member purchased one and compared to the Motorcraft only difference was a sticker over the Motorcraft P/N.
I personally would not go with anything other then a Motorcraft or Denso. In a year you will be back with the same issues with unknown inferior aftermarket parts.
I can only speak from past experience. Needed just one and purchased that Accel unit from OReilys a few years back and it's still good today.
I wouldn't personally change all of them out. Mine have 320k on them after replacing just two of them over the last 17 years. Carry a spare and an OBDll reader and replace if necessary.