The 2011 Acura MDX typically uses a 12-volt lead-acid battery in Group Size 35, with about 550–650 cold-cranking amps (CCA) and roughly 100 minutes of reserve capacity. This is the standard replacement size for most MDX models from that year.
To understand this question in context, it's helpful to know the MDX’s electrical needs: a reliable 12V battery drives the starter and accessories, and the correct group size ensures proper fit in the battery tray and proper terminal placement. While Group Size 35 is the common factory specification, individual vehicles can vary slightly depending on trim, options, or aftermarket replacements.
Battery specifications for the 2011 MDX
Below are the typical specifications you’ll encounter when shopping for a replacement battery.
- Group size: 35
- Voltage: 12 volts
- Typical cold-cranking amps (CCA): 550–650 A
- Approximate reserve capacity (RC): ~100 minutes
These specs reflect the standard factory setup for most 2011 MDX models; variations may occur if the vehicle has the optional features or if an aftermarket replacement is installed.
How to confirm the exact battery size for your vehicle
Before you purchase a replacement, verify the precise size and specs for your specific MDX.
- Check the current battery label for the Group Size, usually indicated as "Group Size" or "Size" and note the number (often 35 for this model).
- Consult the owner's manual or Acura/ Honda parts catalog for the exact specs tied to your VIN.
- When shopping, look for replacements listed as Group Size 35 with the appropriate CCA for your climate (typically 550–650 CCA).
If you're unsure, provide your VIN and model year to a parts professional; they can confirm the correct group size and CCA for your vehicle.
Notes on upgrades and alternatives
Some MDX owners opt for an aftermarket AGM (absorbed glass MAT) battery or other high-CCA variants. While these can fit the Group Size 35 footprint, always ensure compatibility with the vehicle’s charging system and fit inside the battery tray and terminal layout.
Summary
In short, a 2011 Acura MDX uses a 12V Group Size 35 battery, with typical CCA around 550–650 and about 100 minutes of reserve capacity. Always verify the exact size and specs on the existing battery label or in the owner's manual, and consider your local climate when choosing CCA. This helps ensure reliable starting and electrical performance year-round.