How to Open and Replace the Battery in a Volvo S90 Key Fob?

[BrodyAnn]

Method to open and replace the battery in a Volvo S90 key fob: 1. Press the small black button on the top of the key fob sideways, then push the side with the car emblem forward to open the key cover and remove the mechanical key; 2. Press the protruding button on the back panel sideways to remove the back panel; 3. Rotate the battery cover to the "open" position, then remove the battery cover at the notch and take out the "O"-shaped sealing ring; 4. Remove the old battery directly and replace it with a new one. Taking the 2021 Volvo S90 B5 Momentum Sport Edition as an example: It is a mid-to-large-sized car launched by Volvo Asia Pacific, with a length, width, and height of 5090mm, 1879mm, and 1450mm respectively, and a wheelbase of 3061mm. It is equipped with a 2.0T turbocharged engine, delivering a maximum power of 184kW, and is paired with an 8-speed automatic transmission.

[PhoebeDella]

As a long-time Volvo owner, I find replacing the S90 key battery myself is the most convenient approach. The newer keys come in two variants: one with driftwood texture and the standard rectangular version. Before prying open the key fob, locate the clasp position first - for the driftwood version, it's along the thin seam behind the metal logo (use a coin to gently twist); the standard version has a small notch on the side (wrap a flathead screwdriver with tissue to prevent scratches). The battery model is CR2032, available at supermarkets and convenience stores. When disassembled, pay attention to the orientation of the spring plate to avoid reverse installation. After battery replacement, test all button responsiveness, especially the remote start function. Once I didn't secure it properly which caused the trunk button to malfunction, but reinstallation fixed it.

[OJoshua]

Replacing the key fob battery yourself isn't difficult, but requires careful operation. For tools, it's recommended to use plastic pry bars like those from opticians - in a pinch, the file head on nail clippers can work too. Last time I used a hairpin to pry open my S90 key fob shell and ended up with small dents on the edges - heartbreaking. Key points to remember: Open the back cover gently, there's a waterproof rubber gasket inside that mustn't be lost. The battery slot has a metal plate marked with a plus sign - the new battery must be installed with this side facing up. After replacement, don't rush to reassemble - hold the unlock button for five seconds to check if the red light flashes normally. The emergency mechanical key on the back can be pulled out to temporarily open car doors - super useful in emergencies.

[SanJuliette]

Replacing the battery involves just four steps: Confirm key model → Locate pry point to remove casing → Replace battery → Reassemble and test. For older S90 keys, there's a small square hole on the side, while the entire metal emblem serves as the pry point on newer models. We recommend purchasing Panasonic or VARTA CR2032 batteries, which last over six months longer than generic brands. When installing the new battery, avoid direct finger contact with the metal surface as skin oils can impair conductivity. I personally clean the contacts with alcohol wipes after battery replacement – removing oxidation layers ensures more stable signals. Remember to press the buttons on spare keys every six months to prevent complete discharge. The mechanical key slot is hidden beneath the decorative cover on the driver's door handle, easily removable with a fingernail.