4.7L V8 SMPI DOHC. The SUV that never quits! Toyota Reliability! If you demand the best things in life, this superb 2008 Toyota 4Runner is the very reliable SUV for you. New Car Test Drive said, ...It will get you over the rocks and through the muck, but it wont make you regret its off-road capability when youre cruising the Interstate... J.D. Power named the 2008 4Runner as the highest ranked in Overall Dependability in its class. Its the combination of advanced design and precision engineering that makes the 4.7L V8 SMPI DOHC engine such an impressive powerplant.