2015 Buick Regal Battery Size, BCI Group & Replacement Specs
Quick Specification Summary
The 2015 Buick Regal takes a Group 48 (H6) battery rated at a minimum of 760 CCA.
BCI Group
Group 48 (H6)
Min CCA
760
Chemistry
AGM Required
Terminal
Right Positive (+)
Terminal Polarity Safeguard
Right Positive (+)
Verify terminal layout prior to ordering. Reverse-terminal batteries prevent factory battery cables from seating, which introduces unnecessary mechanical strain.
Chemistry Requirement
AGM Battery Mandatory
Stop-start equipped models require Absorbent Glass Mat (AGM) construction to handle high cycling demands without early degradation.
🛒 Recommended Replacement Batteries & Charging Equipment
Direct-fit replacement power units and essential battery service equipment for the 2015 Buick Regal:
Exact OEM Fitment
BCI Group Group 48 (H6) 12V Battery
Factory replacement unit meeting or exceeding 760 CCA with Right Positive (+) configuration.
Emergency Roadside Power
NOCO Boost Lithium Jump Starter
Compact 1000A portable jump pack with spark-proof technology and reverse polarity safety protection.
Battery Health & Maintainer
Smart 12V Trickle Charger & Desulfator
Microprocessor-controlled multi-stage charger to keep AGM and flooded batteries at peak capacity throughout storage.
Terminal Corrosion Protection
Battery Terminal Cleaner & Protector Kit
Wire post cleaner brush, anti-corrosion felt fiber washers, and terminal protective barrier spray.
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Estimated Replacement Cost vs Dealership
DIY Purchase: $180 to $240 • Shop Installed: $280 to $370
Save up to $100 in Labor
Replacing the battery at home requires a standard 10mm socket wrench and takes under 20 minutes.
Factory Battery Specifications
| Specification | Factory Value |
|---|---|
| BCI Battery Group Size | Group 48 (H6) 🛒 (Check Prices) |
| Cold Cranking Amps (CCA @ 0°F) | 760 Amps Minimum |
| Cranking Amps (CA @ 32°F) | 950 Amps |
| Reserve Capacity (RC) | 120 Minutes |
| Battery Chemistry | Absorbent Glass Mat (AGM) |
| Battery Tray Dimensions (in) | 10.94 x 6.89 x 7.48 in (L x W x H) |
| Battery Tray Dimensions (mm) | 278 x 175 x 190 mm (L x W x H) |
| Terminal Configuration | SAE Automotive Top Post (Right Positive (+)) |
| Hold-Down Bracket Bolt Size | 10mm socket |
| Clamp Fastener Torque Spec | 3.5 to 4.5 ft-lbs (40 to 54 in-lbs / 5 to 6 Nm) |
| Estimated Replacement Cost | DIY: $180 to $240 | Installed: $280 to $370 |
Step-by-Step DIY Battery Replacement Sequence
Always adhere to the proper terminal sequence to avoid accidental electrical arcs or vehicle computer damage:
Removal Procedure
- Step 1: Turn off the engine, engage the parking brake, and remove the key fob.
- Step 2: Put on safety glasses and insulated work gloves.
- Step 3: Loosen the Negative (Black / Minus) terminal nut with a 10mm wrench and lift the cable clear.
- Step 4: Loosen the Positive (Red / Plus) terminal nut and tuck the cable aside safely.
- Step 5: Remove the 10mm hold-down bracket bolts and lift the battery vertically from the tray.
Installation Procedure
- Step 1: Inspect the battery tray and clean any corrosive deposits using a wire terminal brush.
- Step 2: Seat the new battery into the tray ensuring correct terminal orientation (Right Positive (+)).
- Step 3: Reinstall the hold-down bracket and torque clamp bolts to 45 in-lbs to prevent vibration.
- Step 4: Attach and tighten the Positive (Red / Plus) terminal clamp first.
- Step 5: Attach and tighten the Negative (Black / Minus) terminal clamp second to complete the circuit.
- Step 6: Apply a light coating of anti-corrosion grease or terminal protectant spray.
Video Walkthrough: How to Replace the Battery on a 2015 Buick Regal
Watch this step-by-step tutorial covering terminal safety sequence, 10mm bolt removal, and hold-down clamp installation.
Critical Safety Reminder: Always disconnect the negative (black / minus) terminal first and reconnect it last. This eliminates the chance of grounding sparks if your wrench touches the metal body of the vehicle.
Additional Technical Specifications for This Vehicle
Explore complete mechanical specifications, fluid capacities, and real-world running costs for the 2015 Buick Regal:
Engine Oil & Filter Specs
View exact oil capacities in quarts and liters, recommended viscosity grades, and drain plug torque specifications.
View Oil Capacity Guide →Fuel Cost & Commute Calculator
Calculate exact annual gas spending, daily commute expenses, and fuel tank driving range based on EPA ratings.
Calculate Fuel Costs →Wheel Lug Nut Torque Specs
Look up factory wheel lug torque specifications in Ft-lbs and Nm, socket sizes, and star tightening patterns.
View Lug Nut Torque Specs →Frequently Asked Questions
What battery size does a 2015 Buick Regal use?
The 2015 Buick Regal uses a BCI Group 48 (H6) battery with a minimum of 760 Cold Cranking Amps (CCA) and 12-volt output. Tray dimensions measure 10.94 x 6.89 x 7.48 in (278 x 175 x 190 mm).
Does the 2015 Buick Regal require an AGM battery?
A standard flooded lead-acid battery meets factory requirements, but an AGM battery can be installed as an upgrade for extended cycle life and improved heat resistance.
Which battery cable should be removed first on a 2015 Buick Regal?
Always disconnect the Negative (black or minus) cable first using a 10mm socket. Disconnecting the negative cable first eliminates the risk of an accidental electrical short circuit if your metal wrench touches the vehicle frame.
How much does a replacement battery cost for a 2015 Buick Regal?
A replacement Group 48 (H6) battery costs approximately $180 to $240 for DIY purchase from major retailers like AutoZone or Advance Auto Parts. Professional installation with computer registration typically costs between $280 to $370.
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