carfobbattery

Mitsubishi Lancer key fob battery

Every model year listed for the Mitsubishi Lancer has a proven battery. The most common answer is CR2032. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.

  1. 2002-2005Remote (separate)

    CR2032

    FCC ID OUCG8D-525M-A

    Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 1, 2026)

    Find CR2032 on Amazon
  2. 2006-2007Remote (separate)

    CR2032

    FCC ID OUCG8D-525M-A

    Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 1, 2026)

    Find CR2032 on Amazon
  3. 2008-2013Smart key

    CR2032

    FCC ID OUC644M-KEY-N

    Two sites agree: uhs-hardware.com and noblekeysupply.com (checked Nov 1, 2026)

    Find CR2032 on Amazon
  4. 2014-2015Key-head remote

    CR1620

    FCC ID OUCG8D-625M-A

    Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 1, 2026)

    Find CR1620 on Amazon
  5. 2014-2017Smart key

    CR2032

    FCC ID OUC644M-KEY-N

    Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 1, 2026)

    Find CR2032 on Amazon
  6. 2016-2017Key-head remote

    CR1620

    FCC ID OUCJ166N

    Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 1, 2026)

    Find CR1620 on Amazon

Changing the battery

Separate remote fob

  1. The remote is a small standalone unit. You will not need to touch the ignition key at all.
  2. Turn it over: some older fobs use one small screw, newer ones just clip. Pry at the seam once any screw is out.
  3. Replace the cell, keeping the + side where it was, and check the small metal tab still touches it.
  4. Close the fob and test it. If it does not work, open it again and check the cell is seated flat.

A CR2032 is 20 mm across and 3.2 mm thick. CR2032, CR2025 and CR2016 share the same width but not the same thickness, so a swap between them can leave a loose contact or a case that will not close.

Smart key (push-button start)

  1. Start by freeing the hidden metal key: there is a latch or slide on the case, and the blade comes out once it moves.
  2. The gap left by the metal key usually has a pry point. A slow twist with a thin flat tool (tape on the tip saves the plastic) opens the two halves.
  3. Pop the old battery out with a toothpick or plastic pick, not a metal blade, and seat the new one with the + side matching the old one.
  4. Snap the halves back together, slide the metal key home, and press each button, then try the start button from the driver's seat.

A CR2032 is 20 mm across and 3.2 mm thick. CR2032, CR2025 and CR2016 share the same width but not the same thickness, so a swap between them can leave a loose contact or a case that will not close.

Key with remote in the head

  1. This type has the buttons built into the key head. The cell is inside that head, between two clipped halves.
  2. Many key heads split along the side seam. Start at the small notch and pry a little at a time.
  3. The coin cell is usually under or on the back of a small board. Keep the rubber button pad in place while you swap the cell.
  4. Close the head, check there is no gap, and try the buttons.

A CR1620 is 16 mm across and 2.0 mm thick. It is easy to confuse with the 20 mm CR20xx sizes, which will not fit.

If a child might have swallowed a coin cell, treat it as an emergency and get to a hospital right away.

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