2016–2021 10th generation (FC/FK)
2016–2021 Honda Civic Key Fob Battery Type and Replacement
The 2016–2021 Honda Civic key fob takes a CR2032 coin cell. How to open the fob without breaking it, and which substitutions actually work.
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Quick answer
The 2016–2021 Honda Civic key fob takes a CR2032 coin-cell battery, available at any pharmacy, hardware store, or online for a few dollars.
Replacing the 2016–2021 Honda Civic key fob battery
- Pry the fob open gently at the seam with a small flathead screwdriver or a coin, working around the edge. Many fobs have a hidden release slot near the key ring or emergency-key blade.
- Note the battery orientation (usually positive side up) before removing the old cell.
- Avoid touching the new battery's faces with bare fingers; skin oils can shorten its life.
- If the fob doesn't work after replacement, check that the battery is seated fully and the contacts weren't bent. Most vehicles do not need re-pairing after a battery change.
Which Honda Civic model years does this cover?
These key fob battery specifications apply to every Honda Civic built from 2016 through 2021 — the 10th generation (FC/FK), compact sedan, coupe, and hatchback. Nothing in this specification changes between those model years. Pick your year for the engines it offered, what changed that year, and the problems recorded against it.
What changed during the 2016–2021 Honda Civic
- 2016Generation launch (sedan/coupe, 2.0L and 1.5T). Two recalls hit the first year: piston pin snap rings (16V-074) and the electric parking brake software (16V-725).
- 2017Hatchback, Si (205 hp), and Type R (306 hp) join the lineup
- 2019Facelift: revised fascias, standard Honda Sensing, volume knob returns, new Sport sedan/coupe trim
- 2021Final year; sedan/hatch only (coupe dropped after 2020, no 2021 Si)
2016–2021 Honda Civic key fob battery: common questions
What battery does the 2016–2021 Honda Civic key fob take?
- A single CR2032 coin cell.
Can you use a CR2032 instead of a CR2025 in a 2016–2021 Honda Civic key fob?
- This fob takes a CR2032, so start there. The two cells share a 20 mm diameter but differ in thickness, and the thicker one does not always seat in a housing built for the thinner.
How do you open a 2016–2021 Honda Civic key fob?
- Slide out the mechanical emergency key first, which usually releases a catch, then part the halves with a plastic pry tool or a coin wrapped in tape. A screwdriver will mark the case and can crack the seam.
Sources
- Motivx Tools, 2016–2018 Civic oil change guide (capacities by engine)
- AMSOIL product application guide, 2017 Civic 1.5L L15B7
- Honda parts, 17220-5AA-A00 (1.5T) and 17220-5BA-A00 (2.0L) air filters
- Honda parts, 12290-59B-003 spark plug (NGK ILZKAR8H8S), 2016–2021 Civic 1.5T
- Honda parts, 15400-PLM-A02 oil filter
- NHTSA recall 20V-314, Denso fuel pump (Part 573 report)
- NHTSA recall 23V-858, expanded fuel pump recall (Part 573 report)
- NHTSA, 2016 Civic piston pin snap ring recall 16V-074 / SB 16-017
- Honda TSB 19-091, AC condenser 10-year warranty extension (NHTSA copy)
- WardsAuto, Honda extends warranty for 1.5L oil dilution (Civic/CR-V)
- TirePressure.org, 2017 Honda Civic placard pressures by trim
- fueleconomy.gov, 2017 Honda Civic EPA ratings
- CivicX forum, brake rotor/caliper dimensions by trim
- Interstate Batteries, 2017/2019 Civic Group 51R fitment