Owner reviews for spark plug

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Autolite Spark plug

I would also like to leave a comment here about having success with an autolite AR52 plug. Same exact thread size and identical reach as the OEM torch plug.

Pros: success with autolite plug
Part number: AR52
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Bosch Spark plug

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.

Pros: perfect replacement, same heat range
Cons: stupidly expensive
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NGK Spark plug
sweeptheleg_84
Rating 3.0
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Here’s a link that may be of help. Your plugs are quite fouled and even at end of life plugs should not look like that.

Cons: plugs quite fouled
Vehicle: Toyota
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Bosch Spark plug
GDRMetal_lady
Rating 1.0
  • Idle:
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I personally refuse to put anything Bosch made in my cars. All were genuine Bosch parts from my local parts place that has never done me wrong.

First it was their wipers, paid good money for them, squeeled worse than the worn old ones. Figured it's a fluke.

Then I had a set of spark plugs, they were gapped correctly, but the car ran like absolute garbage and I couldn't figure it out until I put the probably 20 year old Valeos back in and it ran fine again.

Then I had a crankshaft sensor that was bad out of the box, and that was the last straw for me. I don't care if it's coincidence or a bad batch, or if they've improved it since, I'm done with any Bosch parts unless it's NOS from the early 2000s or earlier.

Cons: poor quality, unreliable
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