Buyer Research

2015 Buick Regal — Should You Buy One?

Typical asking price: $7,500–$13,000. There is 1 high-severity known issue you need to know before handing over a check.

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Kestrel Take

Second year after the refresh that made the 2.0L turbo the standard engine and pushed the 2.4L eAssist mild hybrid to an option, and the public record is thin: 33 complaints and no recall campaigns on file for this year. Thirty-three filings is not a reliability rating — it is a small group of owners, and the toe-link corrosion campaigns that reached the 2012 and 2013 Regals do not list the 2015 in the record we have. What those owners did write about is familiar from the earlier cars: the 2.4L burning oil until it seizes, and HID headlight housings that fog, fill with water and go dark one side at a time. One fire, in a parked car, and one crash sit in the record too. The turbo car sidesteps the oil problem entirely, so if you have the choice, take the 2.0T; either way, look inside both headlights on a cool morning, check the dipstick before the drive, and idle it at a few stop lights to see whether it stays running.

What we checked

Reconciled against public records, 2026-09-25

NHTSA holds 33 owner complaints for the 2015 Buick Regal, and no recall campaigns.

A big number here usually means a lot of these were sold, not that it is a bad vehicle — popular models collect more complaints for the same rate of trouble. So the total on its own says little. What is worth reading is the shape of it. The largest single group is the engine at 27%. That is notable without being overwhelming — worth checking, not worth panicking about.

Counts come from the NHTSA complaint and recall database — free, public, and worth checking yourself.

Known Issues for the 2015 Buick Regal

Ranked by wallet impact. These are documented, recurring problems — not freak accidents. How we decide that.

HID headlight housings fog, fill with water and kill the ballast — driver's side first, then the passenger'sHigh — wallet impact

Eight of 33 complaints are exterior lighting, and every one is the same headlight story that runs through this Regal generation: condensation inside the lens, then a puddle, then a dead HID bulb or ballast. Owners describe the driver's side going first and the passenger's following within a year, and one had the replacement aimed so low the left side of the road disappeared at night. The seal between the inner and outer shells fails, and the fix is the whole assembly; on the HID cars that is four figures a side and both sides commonly need doing. Look at both lenses after the car has sat overnight, then switch on low beams, high beams and turn signals and have someone confirm all six light up.

Repair cost (estimate): $600–$1,500 per headlight assembly; both sides commonly fail within a year of each other

Source: NHTSA complaints filed under the lights (8).

2.4L eAssist engine burns oil and can seize; engine dies at a stop light and restartsMedium

Nine complaints are the engine and one ended in a parked car burning. The oil stories are the 2.4L Ecotec's known piston-ring wear: a quart or more between changes, dealers calling it normal, and one owner losing the engine at 109,000 miles after topping off every two weeks. One car had its engine replaced twice before 54,000 miles. A separate owner describes the engine cutting out when rolling up to a red light and restarting fine — a fault that on this car usually traces to the eAssist 12-volt side or a throttle body, and that a scan will show. We rate this medium only because the 2.4L is the minority engine for 2015; on an eAssist car treat it as the whole decision. Pull the dipstick before the drive, ask what the seller adds between changes, and idle at three or four lights with the air conditioning on.

Repair cost (estimate): $2,500–$4,500 for pistons and rings; $4,000–$6,500 for a replacement engine; $150–$600 for a throttle body or battery if it only stalls — around 63% of what this car is typically worth

Source: NHTSA complaints filed under the engine (9).

Dashboard and radio black out for a few seconds; doors lock occupants inside; airbag lightMedium

Five electrical complaints with no one part behind them. Two owners had the entire instrument cluster and radio go dark for a few seconds while driving, the engine still running; one came back two hours later to a car that would not unlock with the remote and then armed its own alarm. Another was trapped inside for fifteen minutes when the door lock button set the anti-theft system and the interior handles stopped working. One owner ties a red airbag light to a failed ambient-temperature sensor and weak acceleration. On this car a weak battery or a corroded ground behind the dash is the cheap first suspect for the blackout, and a body control module the expensive one. Load-test the battery, then drive twenty minutes with headlights, blower and radio on and watch the cluster; lock and unlock the doors from inside with the engine off.

Repair cost (estimate): $150–$450 for a battery or ground repair; $500–$1,200 for a body control module

Source: NHTSA complaints filed under electrics and electronics (5).

Four fuel-system reports, one with a crash, that we cannot resolve to a partLow

Four of the 33 complaints are filed under fuel system and one involved a crash. The record is too small to read them into a pattern, and we are not going to name a part we have not seen described. It belongs on the test drive rather than the invoice: pull away hard from a dozen stops, hold highway speed for ten minutes, and treat any hesitation, surge or stumble as a reason to walk until a shop has scanned it. Note that on a 2015 the high-pressure direct-injection fuel pump on either engine is a four-figure part, which is why a hesitation is worth chasing before you pay.

Repair cost (estimate): $100–$200 for a diagnostic scan; $900–$1,600 if it is the high-pressure fuel pump

Source: NHTSA complaints filed under the fuel system (4).

Walk-Away Red Flags

✗Fog, droplets or a tide line inside either headlight lens after the car sat overnight
✗Oil below the full mark on the dipstick, or a quart of oil riding in the trunk
✗Engine that stumbles or dies rolling up to a stop light on the test drive
✗Instrument cluster or radio that flickers or goes dark, even briefly
✗Door lock button that arms the alarm and locks the interior handles
✗Any hesitation or surge under hard acceleration on the highway merge

Good Signs

✓A 2.0T car — the turbo engine, which sidesteps the 2.4L's oil-consumption fault
✓Both headlight assemblies replaced with an invoice, and both lenses clear on a cool morning
✓Oil at the full mark with a record of changes every 5,000 miles or less
✓A steady idle through three or four stop lights with the air conditioning running
✓Battery load test passed, with a dated sticker inside the last three years
✓Instrument cluster and radio lit steadily through a twenty-minute drive with every accessory on