GarageDex

2018 Acura TLX Battery Size

The 2018 Acura TLX uses a BCI Group 35 battery (Group 48 also fits), rated about 540-640 cold cranking amps (Flooded).

BCI Group Size35also fits Group 48The case-size code that sets the physical fit and terminal layout.Verified fit
Battery type (OEM)
Flooded
Cold cranking amps (CCA)
540-640
Terminal position
Standard-terminal layout
Dimensions (L×W×H)
230×175×225 mm
Location
Under the hood (engine bay)

Base Group 35; SH-AWD/start-stop use H6 (48) AGM. Always confirm against your owner's manual or current battery label.

Verified fitLast checked
Sources: CarSpecs
It comes with a standard flooded battery. You can usually step up to an AGM in the same Group 35 for longer life, but it isn't required. A 540-640 CCA rating is typical for this class. Matching or slightly exceeding the OEM figure is fine; going below it risks hard starts in winter. Group 35 defines the case size and terminal layout (standard-terminal layout), so any reputable Group 35 battery will fit the tray and connect correctly. Some trims or engines use Group 48 instead, so always confirm against the label on your current battery.

Where to buy a Group 35 battery

A car battery is heavy and expensive to ship, so buying in person (Walmart, Costco, or a local auto-parts store) often beats online once you count free installation and the core-charge refund on your old battery. To compare prices and reviews online:

Search Group 35 batteries on Amazon540+ CCA, Flooded

As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.

Frequently asked

What size battery does a 2018 Acura TLX take?

The 2018 Acura TLX uses a BCI Group 35 battery (Group 48 also fits), rated around 540-640 cold cranking amps.

Does the 2018 Acura TLX need an AGM battery?

No - it comes with a flooded battery from the factory. You can usually upgrade to AGM in the same Group 35 size, but it isn't required.

How many cold cranking amps (CCA) does it need?

Aim for roughly 540-640 CCA. Choosing at or above the OEM rating is fine; going below can cause hard starts in cold weather.

Where is the battery located?

Under the hood (engine bay). Standard-terminal layout.

Other vehicles that use Group 35

See all cars that take a Group 35 battery →
2020 Acura TLX2019 Acura TLX2017 Acura TLX2016 Acura TLX

Also check the wiper sizes for your 2018 Acura TLX →