BuickRegal2015Overview/buick/regal/2015/base/

2015 Buick Regal

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2015 Regal.

Body PASSENGER CAR

The 2015 Buick Regal is a passenger car requiring 5.0 quarts of 5W-30 engine oil. While the model year has seen zero recalls, it has accumulated 33 owner complaints, with the engine identified as the primary area of concern. Positioned within a model history spanning 1990 to 2020, the 2015's reliability record is significantly better than the 325 complaints reported for the 1998 model, though it exceeds the single complaint recorded in 2008.

Model year201820172016201520142013201220112004

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity5.0 qtOEM · verified
Engine oil type5W-30OEM · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 47 · 525 CCA battery, OE oil filter 25206377. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 47 · 525 CCAOEM · verified
Tire sizeP245/40R19OEM · verified

OE service part numbers OEM · verified

Engine oil filter25206377 alt 12580255
Engine air filter55560894 alt 20972655
Spark plug12681658 alt 12681659
Battery88864541 alt 88866291
Front wiper blades84574892 alt 84574893
Serpentine belt12627134 alt 12660099
Thermostat12622410 alt 12630780
Cabin air filter13503677

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length190.6 in
Overall width73.2 in
Overall height58.3 in
Wheelbase107.9 in
Curb weight3642 lb
Track (front / rear)62.6 / 62.6 in
Weight distribution (front / rear)58/42

Performance & power Independent road tests

0–60 mph, quarter-mile, horsepower and torque from independent road tests.

Independent road tests for the Regal of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.

5.4–9.4 sec0–60 mph (tested)quickest 5.40 sec — 2018 GS Fastback Sedan
YearTrim / engine0–60¼ mileHPDrivetrain
2014Turbo Premium II Sedan 2.0L Turbo I-46.10 sec14.80 sec259 hpFWD
2014GS Sedan 2.0L Turbo I-46.20 sec14.70 sec259 hpAWD
2014GS Sedan 2.0L Turbo I-46.20 sec14.60 sec259 hpAWD
2014Turbo Premium II Sedan 2.0L Turbo I-46.40 sec14.70 sec259 hpAWD
2014Turbo Premium II Sedan 2.0L Turbo I-46.60 sec15.00 sec259 hpAWD
2012GS Sedan 2.0L Turbo I-46.20 sec15.00 sec270 hpFWD
2012GS Sedan 2.0L Turbo I-46.20 sec15.00 sec270 hpFWD
2012GS Sedan 2.0L Turbo I-46.30 sec14.90 sec270 hpFWD

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 5.0 qt of 5W-30 engine oil, DOT 3 brake fluid. Torque the oil drain plug to 18.0 ft-lbs. The firing order is 1-3-4-2. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

Lubricants & capacities

Automatic Transmission FluidDEXRON(R)-VI Automatic Transmission Fluid.
Brake FluidDOT 3
Brake Fluid Capacity0.981
Clutch FluidDOT 3
Engine Coolant50
Engine Coolant Capacity7.8
Engine Coolant50
Engine Coolant Capacity10.1

Engine torques

Camshaft Bearing/Carrier Cap Bolts or Studs89 inch lbs. ft-lbs
Camshaft Bearing/Carrier Cap Bolts or Studs89 inch lbs. ft-lbs
Intake Manifold to Engine Bolts7.3
Exhaust Manifold to Cylinder Head Bolts10.3
Intake Manifold to Engine Bolts7.3
Engine Oil Pan Drain Plug18.0 ft-lbs
Engine Oil Pan Drain Plug18.0 ft-lbs
Engine Oil Pan Drain Plug18.0 ft-lbs

Chassis torques

Transfer Case Fill Plug30.0 ft-lbs
Transfer Case Drain Plug30.0 ft-lbs

Ignition

Cylinder Firing Order1-3-4-2
Spark Plug ManufacturerAC Delco
Spark Plug Gap.037 - .043 in
Spark Plug Torque15 ft-lbs
Spark Plug ManufacturerAC Delco
Spark Plug Gap.030 - .035 in
Spark Plug Torque15 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity24.0 lbs
Oil GroupPAG
Oil Capacity3.7 oz
Standard BCI Group Number47
Standard BCI Cranking Performance525 cca
Standard BCI Group Number48
Standard BCI Cranking Performance615 cca

Service checks

Pressure Test15 psi
Radiator Cap Pressure Relief15 psi
Thermostat Opening Temperature188-206 °F
Regulated Fuel System Pressure (With Vacuum)43-58 psi at idle psi
Key ON Engine OFF (KOEO)50-94
Regulated Fuel System Pressure (With Vacuum)43-58 psi at idle psi
Key ON Engine OFF (KOEO)50-94
Engine Compression100 psi

Brakes

Brake Caliper Bolt to Carrier TorqueFront: 20; Rear: 20 /
Brake Caliper Carrier to Hub Bolt TorqueFront: 111; Rear: 74 /; Front: 111 Tighten; Rear: 74 Plus
ABS Sensor Torque7 / NS
Minimum Pad ThicknessFront: 0.080; Rear: 0.080 specification
Variation from Parallelism Thickness Variation.00024
Maximum Rotor Runout.002

Multi-step torque procedures OEM · verified

Steering Track (Rod End) Bolts — tightening sequence 1 stages
130
Connecting Rod (Large End) Bearings — tightening sequence 1 stages
118.0 ft. lbs., Step 2: 10018 ft. lbs
Connecting Rod (Large End) Bearings — tightening sequence 1 stages
118.0 ft. lbs., Step 2: 10018 ft. lbs
Cylinder Head — tightening sequence 3 stages

Prep Do not reuse old bolts.

122.0 ft. lbs.22 ft. lbs
2150 degrees150 degrees
3Outer bolts 26.0 ft. lbs.26 ft. lbs
Cylinder Head — tightening sequence 3 stages

Prep Do not reuse old bolts.

122.0 ft. lbs.22 ft. lbs
2150 degrees150 degrees
3Outer bolts 26.0 ft. lbs.26 ft. lbs
Cylinder Head — tightening sequence 2 stages

Prep Do not reuse old bolts.

122.0 ft. lbs.22 ft. lbs
2190 degrees190 degrees
Engine Flywheel Bolts — tightening sequence 1 stages
139.0 ft. lbs., Step 2: 2539 ft. lbs
Engine Flywheel Bolts — tightening sequence 1 stages
139.0 ft. lbs., Step 2: 2539 ft. lbs
Main Bearings — tightening sequence 1 stages
115 ft. lbs., Step 2: 7015 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 7,500 mi; spark plugs every 60,000 mi; coolant at 150,000 mi. The big-interval services (at 150,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

Every 7,500 miAccelerator Pedal (inspect) · Body Latches, Locks & Hinges (lubricate) · Brake Shift Interlock Solenoid (inspect) · Brake System (inspect) · Engine Oil (inspect fluid level) · Engine Oil Life Monitor (inspect)
Every 22,500 miCabin Air Filter (replace)
Every 45,000 miEngine Air Filter Element (replace) · Fuel Evaporative Emission Control System (inspect)
Every 60,000 miSpark Plug Wires (inspect) · Spark Plugs (replace)
Every 97,500 miAccessory Drive Belt (inspect)
At 150,000 miBrake Hydraulic System (drain, refill & bleed) · Clutch Hydraulic System (drain & refill) · Engine Coolant System (drain, flush & refill)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

The 2015 Buick Regal shows a clear improvement over the troubled 2011 model year, which recorded 279 complaints—the peak of the generation. Complaints dropped sharply to 92 in 2012, then continued declining to 38 in 2014 before reaching 33 in 2015. Notably, the 2015 model year had zero recalls and zero NHTSA investigations, a sharp contrast to 2012 and 2013, which each had 2 investigations and 6-7 recalls. The TSB count also declined from 1,884 in 2013 to 1,526 in 2015, suggesting reduced technical service bulletin activity. Top complaint areas were engine (7), exterior lighting (5), and service brakes (2), with one crash-related complaint and one fire complaint on record. This places 2015 near the low point of the complaint curve for this generation, representing a relatively mature and stabilized model year. The 2015 Buick Regal appears to be a good candidate within this generation, offering the benefits of the post-2011 quality improvements with no active recalls for the model year itself.

0
Open recalls
NHTSA campaigns
1526
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
33
Owner complaints
1 involved a crash · 1 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Overall★★★★★
Frontal★★★★
Side★★★★★
Rollover★★★★

Owner complaints filed with NHTSA, by component

All 33 complaints on record, top 8 components.

Engine7
Exterior Lighting5
Service Brakes2
Unknown Or Other2
Electrical System,Air Bags,Fuel/Propulsion System1
Engine,Fuel/Propulsion System1
Suspension,Air Bags,Seat Belts1
Steering1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.

Technical service bulletins NHTSA · verified

Showing 5 of 1526 bulletins on record with NHTSA.

BulletinDateComponentSummary
PIP61132026-05-18Unknown Or OtherThis document provides the technician with a diagnostic tip if the vehicle stalls and set…
PIT3271Q2026-04-01Unknown Or OtherThis preliminary information communicates information about how to determine if a wheel…
PIP61042026-03-09Unknown Or OtherThis Preliminary information communicates the steps on how to save a GDS2 Session Log and…
PIP4902V2026-03-09Unknown Or OtherThis preliminary information advises a dealer on how to email GDS2 session logs into…
PIP4902U2026-01-08Unknown Or OtherThis preliminary information advises a dealer on how to email GDS2 session logs into…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific Regal. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Reference guides

Cross-vehicle references for the kinds of data on this page.

Frequently asked

How much oil does the 2015 Regal take?

5.0 qt of SAE 5W-30 engine oil licensed to the dexos1 specfication, or equivalent, of the proper SAE viscosity grade., per the factory manual.

Does the 2015 Regal have open recalls?

NHTSA lists 0 recall campaign(s) for this model year. Check your specific vehicle by VIN.