112,000 miles is well beyond the 160,000km warranty and is actually around 180,000km.
The extend on Xrx's comment, if you mainly do low speed stop and go city traffic, go for a cruise on the highway and let the system fully heat up.
Audio: JVC KD-ABT22 / JL sub+speakers / Sound deadening
Engine: WR-SRI / RRM 25% UDP / 6G75 TB
Other: RA Mudflaps