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Is a replaced engine both a red and green flag?

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Old Aug 22, 2024 | 07:41 AM
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laurcrv's Avatar
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Is a replaced engine both a red and green flag?

Hello everyone, I'm in the market for a new car and a c63s caught my eye recently. It's really well priced but the cons are that it has 93k miles (150k km), and a friend of mine is a friend of the owner and he told me some things about the car.

The car was well maintained but driven really hard in a big portion of it's life, and at one point it had upwards of 700hp from tunes. At 75k miles the car had its engine and possibly transmission too professionally replaced. Now, this is a clear red flag, but is it a NO go? Obviously an engine failure could randomly happen but in this case the culprit is most likely that the car was tuned and driven really hard.

Im not an expert and thats why I would ask the following question, wouldn't it actually be a good thing that the engine/transmission of the car basically now only have 18k miles? Does changing the engine of a car like this, even if done professionally, somehow comes with negatives?

I guess a negative I can think of is the resale potential of such a car will most likely be close to 0 but that's not something I m really concerned

Also, following the replacement the car was driven more conservatively and also mightve been detuned

thank you
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Old Aug 22, 2024 | 09:33 AM
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Originally Posted by laurcrv
Hello everyone, I'm in the market for a new car and a c63s caught my eye recently. It's really well priced but the cons are that it has 93k miles (150k km), and a friend of mine is a friend of the owner and he told me some things about the car.

The car was well maintained but driven really hard in a big portion of it's life, and at one point it had upwards of 700hp from tunes. At 75k miles the car had its engine and possibly transmission too professionally replaced. Now, this is a clear red flag, but is it a NO go? Obviously an engine failure could randomly happen but in this case the culprit is most likely that the car was tuned and driven really hard.

Im not an expert and thats why I would ask the following question, wouldn't it actually be a good thing that the engine/transmission of the car basically now only have 18k miles? Does changing the engine of a car like this, even if done professionally, somehow comes with negatives?

I guess a negative I can think of is the resale potential of such a car will most likely be close to 0 but that's not something I m really concerned

Also, following the replacement the car was driven more conservatively and also mightve been detuned

thank you
If it's been replaced with a stock engine and is no longer "tuned" there's no issues.
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