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50k–180k mi (peaks ~90k)
$300–$900
Population range — not a quote for your car.
Engine & powertrain
Pistons, rings, gaskets, oil consumption, fuel dilution, turbos, intake systems — the patterns that decide whether an engine makes it to 250k.
Notable patterns are the “plan for it, but it isn’t the end of the car” band. Real bills, but proportional to vehicle value.
Vehicles outside this population may exhibit the same symptoms for unrelated reasons. The engine resolves down to your specific VIN before applying this pattern to a Verdict.
The window above is where most documented failures cluster. Vehicles past the tail aren’t immune — but they’ve statistically aged out of the high-density band.
A symptom matching this list isn’t a diagnosis — it’s a flag. The Verdict engine cross-checks symptoms against your VIN’s recall history and the failure window to weigh the probability.
If any of these have been performed on the affected vehicle, the engine reduces the failure-mode deduction accordingly. Documentation matters — “the previous owner said” isn’t the same as a receipt.
Documented walnut blast / intake valve cleaning service
root cause fix
BG/CRC chemical induction service
mitigating service
Catch can installed (PCV oil separator)
mitigating service
$300–$900
This is the documented dollar range we see across affected vehicles. Quotes outside this band — high or low — get flagged in a Verdict.
Base deduction−3 on the 0–100 scale.
Each entry traces to documented sources — recall bulletins, regulator complaints, manufacturer service bulletins. Not forum chatter.
The encyclopedia tells you what’s documented across the population. The Verdict tells you what it means for your specific year, mileage, and recall status.