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Audi A4 Mk5 [B9] 2015+
Recommended for more complex issues or ongoing faults
Please note: Supplied in a pack of 3 plugs
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SMARTflash - Cylinder Deactivation Calibration [Mk8 Fiesta ST] HQ Installation Audi A4 Mk5 [B9] 2015+The 1. 5 litre Dragon engine fitted to the Mk8 Fiesta ST utilises a VDE (Variable Displacement Engine) setup which seamlessly deactivates one cylinder when cruising, or on coast down to help with increasing fuel efficiency and reducing Co2 output. However, eagle eared owners can pick up the somewhat strange noise this activation causes and in particular, when replacing or upgrading the exhaust system, this audible change becomes very apparent (and not
