Another example that comes to mind, this one coming from the Far East (Hong Kong to be precise): Kowloon Motor Bus
Neoplan Centroliner JU 4667 (AP69; new November 2000). It was written off on 10th July 2003 when it was struck by a container lorry on a elevated section of
Tuen Mun Road in Ting Kau (in the New Territories), breaking through the 1 metre high anti-collision barrier (and hanging precariously on the edge for 90 seconds) and finally plunging nose-first 30 meters (98 feet) into a hillside within the Ting Kau village. 21 people died and 20 more seriously injured in what remains KMB's worst accident and Hong Kong's worst traffic accident to date.
What was left of AP69 (as a measure of respect for the victims of this horrific accident, I won't be linking images of the wreck here; they are readily available online anyway if you know where to look) was stored at a Long Win Bus* depot before finally being scrapped in 2008. In short, a total service life of just over 2 and a half years.
*: For those unfamilar (and briefly going off-topic), Long Win is a wholly owned subsidy of Transport International Holdings (much like KMB itself) established in 1996, responsible for running services linking Chep Lak Kok Airport, the new town of Tung Chung and North Lantau with the New Territories. Citybus, through it's
Cityflyer brand, holds the franchise for airport services linking Chep Lak Kok with Kowloon & Hong Kong Island.