The 2011 Volvo S80 has 4 recalls, the most serious being two separate issues that can cause the engine to stall while driving, raising the risk of a crash.
Both stall-related issues stem from the engine and transmission control systems: one involves overly sensitive fuel cut-off logic in the engine control module that can shut the engine down unexpectedly, and the other involves the automatic transmission failing to downshift properly when coasting, which can drop engine speed low enough to stall. There is also a front seatbelt concern where the belt's pretensioner or attachment may not perform correctly in a crash, leaving the occupant with less protection than the system is designed to provide.