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BMW 3 Series key fob battery
CR2450
Battery this key fob uses · 3V
Most BMW 3 Series smart keys use a CR2450 3V lithium coin cell. Flip-key and older remote styles can differ, so always match the cell already inside before buying.
Specifications
| Battery type | CR2450 |
| Voltage | 3V |
| Equivalents | DL2450, ECR2450, BR2450 |
🔍 Battery cross-reference finder
Type any common code to see its voltage, size and interchangeable equivalents.
💡 Pry the fob open at the seam with a coin or small flat screwdriver — many have a slot for this. Slide the old cell out and note which side the + faces.
Frequently asked questions
- What battery does the BMW 3 Series key fob take?
- It uses a CR2450, 3V. Most BMW 3 Series smart keys use a CR2450 3V lithium coin cell. Flip-key and older remote styles can differ, so always match the cell already inside before buying.
- What is a good replacement for the CR2450?
- Equivalents you can use: DL2450, ECR2450, BR2450.
- How do I replace it?
- Pry the fob open at the seam with a coin or small flat screwdriver — many have a slot for this. Slide the old cell out and note which side the + faces.