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2020 Buick

Regal AWD

Auto (S9), 6 cyl, 3.6 L

Buick Regal: best and worst years
2020 Buick Regal AWD
PhotoDinkun ChenCC BY-SA 4.0Wikimedia Commons

Overview

Body
Midsize CarsEPA, from EPA, last updated 6/11/2026
Drivetrain
All-Wheel DriveEPA, from EPA, last updated 6/11/2026
Transmission
Automatic (S9)EPA, from EPA, last updated 6/11/2026
Powertrain
GasEPA, from EPA, last updated 6/11/2026
Fuel
RegularEPA, from EPA, last updated 6/11/2026

Engine & performance

HP
310
Power to weight
0.076 hp/lb
Axle ratio
2.89
Cyl
6EPA, from EPA, last updated 6/11/2026
Aspiration
Naturally aspiratedEPA, from EPA, last updated 6/11/2026
Start-stop system
YesEPA, from EPA, last updated 6/11/2026

Efficiency

MPG Hwy
27 mpgEPA, from EPA, last updated 6/11/2026
MPG City
19 mpgEPA, from EPA, last updated 6/11/2026
MPG Comb
22 mpgEPA, from EPA, last updated 6/11/2026
Fuel $/yr
$2,850EPA, from EPA, last updated 6/11/2026
CO₂
411 g/miEPA, from EPA, last updated 6/11/2026
Eco Score
4/10EPA, from EPA, last updated 6/11/2026
Smog score
6/10
Elec. Range
0 miEPA, from EPA, last updated 6/11/2026
SmartWay certified
No

Dimensions & capacity

Length
193 inNHTSA vPIC, from NHTSA vPIC, last updated 6/4/2026
Width
73 inNHTSA vPIC, from NHTSA vPIC, last updated 6/4/2026
Height
57 inNHTSA vPIC, from NHTSA vPIC, last updated 6/4/2026
Wheelbase
111 inNHTSA vPIC, from NHTSA vPIC, last updated 6/4/2026
Curb Weight
4,096 lbNHTSA vPIC, from NHTSA vPIC, last updated 6/4/2026

Safety NHTSA, model year

Recalls
2
Owner complaints
2

Feature availability

Which features come standard, cost extra, or are locked to a pricier trim arrives with the next data phase. Standard equipment shows here today.

Standard

Reported problems NHTSA owner complaints, model year

  • ELECTRICAL SYSTEM50%
  • TIRES50%

Source: NHTSA owner complaints, 2 total.

Buick Regal: best and worst years

Known issues manufacturer service bulletins, model year

427 service bulletins filed with NHTSA for this model year

  • Apr 1, 2026UNKNOWN OR OTHERPIT3271Q

    This preliminary information communicates information about how to determine if a wheel and tires size change is available.

  • Mar 9, 2026UNKNOWN OR OTHERPIP6104

    This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.

  • Mar 9, 2026UNKNOWN OR OTHERPIP4902V

    This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

  • Mar 2, 2026UNKNOWN OR OTHERPIT6425D

    This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss

  • Jan 16, 2026UNKNOWN OR OTHERPIT6425C

    This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's

  • Jan 14, 2026UNKNOWN OR OTHERPIP6098

    This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered vehicles and advises of warranty direction.

  • Jan 8, 2026UNKNOWN OR OTHERPIP4902U

    This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

  • Nov 20, 2025UNKNOWN OR OTHERPIT5214G

    This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customer’s vehicles that exhibit vibration conditions without utilizing the support of General Motors Technical Assistance Center. If valid vibration frequency or Road Force Variation data has been collected and a repair attempt does not correct the customer complaint, contact General Motors Technical Assistance Center for further sup

  • and 419 more

Source: NHTSA manufacturer communications (technical service bulletins).

Warranty manufacturer terms, by make

Basic
4 yr / 50k mi
Powertrain
6 yr / 70k mi
Roadside assistance
6 yr / 70k mi
Maintenance
1 yr / 12k mi

Information is gathered on a best-effort basis from public sources, may be incomplete or out of date, and is not purchasing or financial advice. Verify with the manufacturer or dealer before buying.