Hey Bimmer!Can you post a link to this or is this just gossip? I only ask because I currently have and previously had twin turbo BMW six cylinder engines and they had no problems. My previous one went to 100,000 miles before I sold it. On my M4 they are recommended having the plugs changed at 75K or less but that is preventative maintenance on a performance car.
I am hoping this Ford twin turbo gives similar reliability while being tuneable (Note I tuned both of my BMW engines as well with no issues). That's why I am following this thread. For the BMWs, I always added aftermarket tunes so my real decision now is to go with Ford's Tune or aftermarket. I think aftermarket is better bang for your buck but I am still trying to figure out the reliability aspect of Ford's engine before going with either.
Those comments are common for all but actual BMW owners who buy new. My wife's first X3 was the i4 N20 and did have issues, as the engine failed and lost compression at 45K miles. This is full disclosure. However, that was the first run of the engine in 2012 (2013 MY) and although out of warranty, BMW replaced at no cost, then we sold it to Carmax and bought her current M40i X3.
Like I said, 7 Bimmers and that was the only issue. the HP water pump was actually the most frequent concern in the E90, where mine was replaced during the recall before it failed and I tracked that car at least monthly with a tune and several M/// upgrades.
Back to our future Fords, tuning these will require more work, as our BMWs are already overbuilt, not even starting on your M4. Meaning, BMWs can take a tune without further upgrades to the fuel, water, air, coolant systems since they already are performance built. I did that on the two I tracked anyway, but mostly because mods are fun.
Bronco likely doesn't have the high performance gear to safely run a tune for high output. So, as long as you knowingly either take it easy, or upgrade flow components, think longevity won't be negatively impacted. Most of this post is info for other readers as well.
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