When a Toyota Corolla cranks slowly or clicks at the key, the 12-volt battery is usually the cause. Most Corollas use a Group 35 battery, the widely available Japanese-fit size. Here is the group size, cost, and how to replace it.
| Model / Years | Group size | Typical CCA | Part cost |
|---|---|---|---|
| Corolla 2009-2025 | Group 35 | 500-600 CCA | $140-$230 |
| Corolla 2003-2008 | Group 35 | 500-580 CCA | $140-$220 |
| Corolla Hybrid 12V aux | Group 35 or aux | 410-540 CCA | $150-$250 |
The Toyota Corolla uses a Group 35 battery across most model years. This is the same size used by the Camry and RAV4, so it is easy to find anywhere. Corolla Hybrid models add a small 12-volt auxiliary battery alongside the traction pack.
Around 500 to 600 cold cranking amps is plenty for the Corolla's small, efficient engine.
A Group 35 battery typically costs about 140 to 230 dollars for the part. With shop installation, budget roughly 180 to 300 dollars. Many parts stores test and install this battery for free.
With the car off, disconnect the negative terminal first, then the positive. Remove the hold-down bracket, lift out the old battery, and set the new one in the same orientation.
Connect positive first, then negative, secure the hold-down, and reset the clock. Re-initialize the power windows if needed.
Watch for slow cranking, dim headlights at idle, a clicking sound at start, and dashboard warning lights. A battery over four years old with these signs is usually ready for replacement.
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