I replaced the battery in my WRX-STI after leaving it alone for 15 years.

Since it had been left unused for 15 years, I knew the battery was dead. When I actually measured the voltage, it was 0.14V. It hadn’t dropped to zero yet, but it was still unusable. This time, I replaced the battery. While I was there, I also installed a battery cut terminal.

１　Tools used and costs　

　Replaced parts　

　Battery 50D20L G&Yu 12,000 yen　

Battery Cut Terminal Astro 500 yen　

The total purchase amount this time is 12,500 yen.　

　Tools used　

　Ratchet, 10mm socket　

２　This work

There were many nut remains in the engine compartment of the WRXSTI that appeared to have been eaten by rats.　

I cleaned it once before replacing the battery. There was a lot of it in the gaps in the engine compartment, but I’ll clean it up eventually.

I removed the old battery and the bracket and plate that held it in place.　

The body has some dirt and rust, but it seems to be usable. Rust is likely to appear in various places from now on.

Plastic plate for placing the battery and metal fittings

It was a little rusty but still in good condition for use.

The new battery had a handle and was easy to work with.

This is the first time electricity has been restored in 15 years.

The front hazard lights and headlights came on.

The rear hazard lights also came on.

The lights around the meter were also lit up.

The DCCD indicator and fuel gauge were lit, and the empty lamp was also on.

I was relieved to see that the air conditioner switch and MD100 also had lights on.

I’m relieved that the battery is now installed. Since I won’t be riding it often for a while, I want to prevent natural discharge. I’ll install a battery cut terminal.

The terminal is attached to the negative side. I used another bolt to connect it for now. It’s a little long, so I’ll change it to something that fits better next time.

３　Costs to date and next work schedule　

The total cost was about 63,000 yen, including 50,000 yen from the previous time and 12,500 yen from this time. Next time, I will finally try starting the engine. The mileage was 111,097 km.

Thank you for reading.