The story
History: facts, each with its source
SlashGear says X-REAS stands for Cross Relative Absorber System. It connects the front and rear shock absorbers through diagonal tubes, the nearside front to the offside rear and the other way round, with a central control absorber that balances the pressure between them.1
SlashGear says it last featured on the fifth-generation 4Runner's Limited and TRD Sport trims.1