How to Replace the Battery in a Changan Ford Focus Car Key?

2 Answers
LolaRose
07/24/25 7:05am
The steps to replace the battery in a Changan Ford Focus car key are as follows: 1. Press the button on the key to pop out the mechanical key; 2. Use a flat-head screwdriver to pry open one side of the car key's outer shell; 3. Remove the old battery, replace it with a new one, and then snap the key's outer shell back into place. The Changan Ford Focus is an A-class family sedan under the Ford brand. The car's dimensions are 4647 mm in length, 1810 mm in width, and 1468 mm in height, with a wheelbase of 2705 mm. In terms of suspension, the front suspension of the Changan Ford Focus is a MacPherson independent suspension, while the rear suspension is a torsion beam non-independent suspension.
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LaHailey
08/11/25 2:48am
After years of driving and changing Focus key batteries countless times, I've summarized a simple procedure. The key is usually a flat remote type - locate a small groove on the side and gently pry open the casing using a small screwdriver or coin (avoid excessive force to prevent damage). Inside you'll find a round CR2032 coin battery, which costs just a few dollars at supermarkets. Remove the old battery, note the +/- markings, and insert the new battery in the same orientation without touching the contacts with oily fingers. Reassemble the cover until you hear a click, then test the unlock signal by pressing buttons. The whole process takes about ten minutes and saves money, but wash hands first to avoid conductivity issues. Replace when noticing reduced remote distance or blinking lights, and keep spare batteries handy for emergencies.
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