Q: The dashboard light on my 2021 Subaru Outback suggested that the key fob battery was low. So, I changed it. Unfortunately, I must have damaged the plastic case in the process. The key won't hold in place, but the fob works fine. Since the key and electronics of the fob are fine, can I use a replacement fob and simply insert the electronics and key from the damaged fob?

G.T., Crest Hill, Illinois

A: Absolutely! You can find empty replacement cases online and at auto parts stores and locksmiths. If you are unsure about doing it yourself, your local locksmith can make the swap.

Q: I have a 2012 Acura TL with 96,000 miles. When I start the car, the compass display is flashing to “calibrate.” This happens when starting at home or at an open mall parking lot. On a rare occasion, the compass system will sense the correct direction and not flash to calibrate. I followed the owner’s manual calibration instructions and had limited success. My wife’s 2013 Acura RDX has never had a compass calibration notice displayed. What is going on with my 2012 Acura?

G.M., Eden Prairie, Minnesota

A: The culprit is likely the compass module. It can be replaced, but if you have a smartphone or GPS device, you may pass on that. You may want to simply disconnect it.

Q: I have a 2016 Toyota Corolla. Recently I heard a rattle in the front end. It was due for one of its checkups at the dealership, so I told them about the rattle. After they finished, they told me that the part that holds the battery in place was loose. So, they tightened it. The dealership is the one who put the battery in two years ago. In my 45-plus years of driving I have never encountered this before. Is it unusual for the bracket to loosen up?

L.P., Newington, Connecticut

A: This is a new one for me. Maybe the shop fixed something else and, rather than go into a long explanation, brushed it off by claiming a loose battery bolt. Or maybe somebody was trying to steal your battery, but you showed up and thwarted them.

Q: I only have 1,949 miles on the odometer of my new Subaru Crosstrek. I use the car for doctor appointments, to visit friends, physical therapy and various errands. I have had two surgeries where I was unable to drive. My daughter drives us in her car for any trips we take or events we attend. Three times I've attempted to run an errand, but my battery was dead. I have to call AAA (yes, I have the extended road service that came with the car). I've taken the car into the dealer and have found out that a Subaru needs to have its stupid battery "babied," so it will stay charged. I'm on my third new battery and was told I needed to attach a tender. If I need a tender, shouldn't that come with the car?

K.R., Newport News, Virginia

A: Battery Tender is a brand of charger that maintains the battery without overcharging. Lots of people call them all Battery Tenders, just as people call all tissues Kleenex. This is not an accessory that comes with a car. I do agree that you should use one. I also suggest you get a battery jump-start box (power pack) and keep it with the vehicle. It’s easy to use and may keep you from being stranded.

©2025 Tribune Content Agency, LLC.