This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
full bulletin at NHTSA ↗2015 Buick Regal engine problems
severe Owners of the 2015 Buick Regal have filed 8 NHTSA complaints about the engine at roughly $3,100 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See engine across all vehicles →
Complaints
8
Recalls
0
Avg fix
$3,100
| Model year | engine complaints |
|---|---|
| 2011 Regal | 63 |
| 2012 Regal | 9 |
| 2014 Regal | 5 |
| 2015 Regal (this page) | 8 |
1fire
When does it fail?
Of the 8 engine complaints filed for the 2015 Buick Regal, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Engine accounts for 24% of all owner complaints filed against this vehicle, across 3 categories tracked.
No new NHTSA engine complaint has been filed on this vehicle in over 9 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay.
full bulletin at NHTSA ↗This service bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may not pass California smog inspection or smog inspection in other states.
full bulletin at NHTSA ↗This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to oil in system.
full bulletin at NHTSA ↗This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to oil in system.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 6 most recent
Tl* the contact owns a 2015 Buick regal. While stopped at a traffic light, the vehicle began to putter and hesitate while accelerating. The failure occurred randomly. The dealer diagnosed that the engine fractured and needed to be replaced. The vehicle was repaired; however, the contact heard a grinding noise. The vehicle was not diagnosed or repaired. The manufacturer was notified. The failure…
Engine has gone out twice within 54k miles. Service tech said this is a know issue with the 2015 Buick regal engine. I just had it replaced the 2nd time in feb of 2020. First time it went out there was only 12k miles on it. Now its nov. Of 2020 and the car is having the same exact issues as it was when both engines went out. I cannot believe this is happening a third time. This is not fair as a…
The contact owned a 2015 Buick Regal. The contact stated that while powered off, a civilian observed smoke emanating from the engine compartment. The contact stated that the vehicle then exploded. The contact stated that a vehicle parked next to the vehicle had damage from the fire. The origin of the fire was unknown. The fire department extinguished the fire and a fire department report was made…
Tl* the contact owns a 2015 Buick regal. When the vehicle reached a complete stop, the vehicle stalled and the engine power reduced warning indicator illuminated. The contact had to turn off and restart the vehicle for it to resume normal operation. The vehicle was taken to anchor Buick GMC (1 automotive blvd, elkton, md 21921, (443) 406-4623) where it was diagnosed that the vacuum pump,…
I started experiencing excessive oil burn at around 85,000 miles. Since then, I have checked my oil biweekly to top off and keep at proper levels along with consistent oil changes as the oil gets dirty quickly. Dealerships before have told me that its "normal" for these engines. At 109,610 miles, I discovered a bad oil leak. I took the vehicle into an independent mechanic to diagnose and fix the…
The contact owns a 2015 Buick Regal. The contact stated while driving at an undisclosed speed, upon reaching a stop light, the vehicle inadvertently lost motive power and was able to restart. After restarting the vehicle, the vehicle returned to normal functionality, but the failure became a regular occurrence. The check engine warning light was illuminated. The vehicle was taken to an…
Had engine trouble with your 2015 Buick Regal?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2015 Buick Regal?
It's a meaningful issue. 8 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $3,100.
At what mileage does the engine typically fail?
Based on the 8 complaints filed, engine issues most often appear around 70,825 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2015/Buick/Regal.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.