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Buick Oncoree ReliabilityAll Years Ranked (2015–2015)

Side-by-side AutoScores, risk levels, and owner-cost projections for every Buick Oncoree we've analyzed. Identify the best years to buy, the ones to avoid, and the problems that follow the Oncoree across generations.

Average AutoScore

79/100

Best Year

2015 Buick Oncoree

Score 79

Weakest Year

2015 Buick Oncoree

Score 79

Every Buick Oncoree Ranked

Sorted by AutoScore. Each link opens the full year-specific report.

2015 Buick OncoreeMODERATEGrade C+

A comfortable compact cruiser, but its Achilles' heel lies in a temperamental turbocharged engine and cooling system that demand vigilance.

Top risks: Turbocharger System · Engine Cooling System · PCV System

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Fits 1964–1988

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Fits 1964–1988

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Buying a Used Oncoree?

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Score, risk level, top risk areas, repair costs, mileage danger zones, and "what I would do" guidance — all in under 60 seconds.

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All scores follow our 7-factor methodology.

Full Detail

Pick a year. Get the full report.

Side-by-side rankings are a great start, but the detailed repair costs, mileage danger zones, and buyer checklist live inside each year's full reliability report.