This preliminary informational (PI) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
full bulletin at NHTSA ↗2016 Buick Regal powertrain problems
moderate Owners of the 2016 Buick Regal have filed 4 NHTSA complaints about the powertrain at roughly $2,500 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See powertrain across all vehicles →
Complaints
4
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2012 Regal | 7 |
| 2013 Regal | 7 |
| 2014 Regal | 6 |
| 2016 Regal (this page) | 4 |
| 2019 Regal | 4 |
When does it fail?
Of the 4 powertrain complaints filed for the 2016 Buick Regal, here's the actual mileage breakdown — failures cluster heaviest at 25,000-50,000 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
Of the 6 model years of Buick Regal we track for powertrain problems, this one has the fewest owner complaints on file (4).
No new NHTSA powertrain complaint has been filed on this vehicle in over 7 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 powertrain 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.
This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
full bulletin at NHTSA ↗This service bulletin provides information on the harmful effects of ethylene glycol in transmission fluid.
full bulletin at NHTSA ↗This informational bulletin explains Unscheduled Supplemental Services and the importance of GM Simplified Maintenance Schedules.
full bulletin at NHTSA ↗This service bulletin informs the technician of an alternate lift procedure that has been developed when the lift plate does not fit the top of the transmission case for 6T30, 6T35, 6T40, 6T45, and 6T50 Transmissions.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 3 most recent
I was driving down the highway in texas, and was in the process of changing lanes to the left and accelerating when all of a sudden my vehicle completely lost power and would not go into gear. My transmission light immediately came on. The psl was 70 and thankfully I was able to move back into the right lane and navigate to the shoulder without getting hit. I eventually coasted off the hwy and…
I was entering a city street from a shopping mall. As I found a small break in the traffic I pulled out and attempted to accelerate. My car did not change gears. I was forced to pull off the road quickly to prevent my car from getting hit from the rear. I had been driving around all day on the interstate and various shopping centers without any indication something was wrong with my car. I…
We purchased this vehicle in May 2016 and from the beginning had strange issues with the engine. It was in and out of the dealer with them trying to figure out the exact problem. They could not, so they contacted GM for approval for an engine replacement. We were concerned about going this route but were assured it would be taken care of for the life of the car. After the replacement in July…
Had powertrain trouble with your 2016 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 powertrain problem on the 2016 Buick Regal?
It's a documented issue but not catastrophic. 4 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Based on the 4 complaints filed, powertrain issues most often appear around 31,600 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 $2,500 for powertrain 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 powertrain?
No active recalls currently cover powertrain 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/2016/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.