Battery groups › 124R
BCI battery group
Group 124R battery size
A BCI group 124R battery is at most 262 mm long, 177 mm wide and 218 mm tall (10.31 × 6.97 × 8.58 in), according to the Battery Council International group chart.
| Maximum size | 262 × 177 × 218 mm |
|---|---|
| In inches | 10.31 × 6.97 × 8.58 |
| Terminal types | A |
| Polarity | Reversed (R): positive terminal on the opposite side from the base group |
| Cold cranking amps (OE range) | 500–740 A |
Cars whose manuals point to group 124R
None of the owner's manuals this site has read so far print group 124R. Most Japanese and Korean makers print a case size or capacity instead of a BCI group, so the battery label on the car is the better guide.
Measuring for a group 124R
To take a group 124R, the tray needs at least 262 mm (10.31 in) of length and 177 mm (6.97 in) of width inside the hold-down, and 218 mm (8.58 in) of height below the hood or any bracket, with room left for the cable ends. These are BCI maximums: a real group 124R battery can be a few millimetres smaller, never larger. Original-equipment batteries in this group were rated from 500 to 740 cold cranking amps, so the right rating depends on the car; match or exceed the rating on the battery you are replacing.
Nearby sizes
| Group | L × W × H (mm) | Difference from 124R |
|---|---|---|
| 124 | 265 × 175 × 214 | +3 mm length, -2 mm width, -4 mm height |
| 24 | 260 × 173 × 225 | -2 mm length, -4 mm width, +7 mm height |
| 74 | 260 × 184 × 222 | -2 mm length, +7 mm width, +4 mm height |
| 152R | 260 × 173 × 225 | -2 mm length, -4 mm width, +7 mm height |
| 24R | 260 × 173 × 229 | -2 mm length, -4 mm width, +11 mm height |
Positive numbers mean the other group is bigger than group 124R. A bigger case only fits if your tray and hold-down have that much spare room; measure inside the hold-down frame, not the old battery.
Fitting a group 124R
The group sets the case size, terminal position and hold-down. A battery from another group can only replace it when the length, width and height all fit the tray and the terminals land on the same sides. No other passenger-car group in the BCI chart has exactly the same case size and polarity. Use the tray fit checker to list every group that fits a measured space.
Source: Battery Council International, BCI Group Sizes (Oct 2023 PDF), page 7. Checked 2026-10-20.