Battery groups › 151R
BCI battery group
Group 151R battery size
A BCI group 151R battery is at most 188 mm long, 125 mm wide and 225 mm tall (7.4 × 4.92 × 8.86 in), according to the Battery Council International group chart.
| Maximum size | 188 × 125 × 225 mm |
|---|---|
| In inches | 7.4 × 4.92 × 8.86 |
| Terminal types | A |
| Polarity | Reversed (R): positive terminal on the opposite side from the base group |
| Cold cranking amps (OE range) | 340–370 A |
| JIS equivalents | 28B19L and 44B19L (BCI best fit) |
Cars whose manuals point to group 151R
None of the owner's manuals this site has read so far print group 151R. 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 151R
To take a group 151R, the tray needs at least 188 mm (7.4 in) of length and 125 mm (4.92 in) of width inside the hold-down, and 225 mm (8.86 in) of height below the hood or any bracket, with room left for the cable ends. These are BCI maximums: a real group 151R battery can be a few millimetres smaller, never larger. Original-equipment batteries in this group were rated from 340 to 370 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 151R |
|---|---|---|
| 52 | 186 × 147 × 210 | -2 mm length, +22 mm width, -15 mm height |
| 61 | 192 × 162 × 225 | +4 mm length, +37 mm width, 0 mm height |
| 54 | 186 × 154 × 212 | -2 mm length, +29 mm width, -13 mm height |
| 402R | 198 × 132 × 188 | +10 mm length, +7 mm width, -37 mm height |
| 51 | 238 × 129 × 223 | +50 mm length, +4 mm width, -2 mm height |
Positive numbers mean the other group is bigger than group 151R. 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 151R
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.