2017 Seat Alhambra 184 in this week for specialised diagnosis, repairs made then adding a custom engine tune to finish.The VAG diesel suffering from high carbon deposits in the exhaust and intake manifold systems. All faults quickly rectified with BG Products Intake clean. Once repaired and completed we managed to see 218Hp and close to 430Hp, a healthy increase over stock which while offering more in hp and torque, still gaining improved fuel economy .