Spark Plug 'Thin Walled' Socket - 14mm A/F Bi Hex
AST6017 is required for spark plug removal/installation on direct injection BMW petrol engines.
These engines require a very 'thin walled' socket in order to reach the spark plug and locate correctly onto the 14mm Bi-Hex.
A spring clip located in the socket holds the spark plug in place during removal/installation.
BMW Direct Injection petrol engines: N43, N53, N54
This socket can also be used on engines with similar access issues to BMW, such as Citroën, Peugeot, Renault and Mercedes.