HELLA ignition coils undergo rigorous tests during development and production, ensuring superior performance in any conditions. The Switch Control Unit ensures the timing and duration of the spark plug function. Improved spark control enhances fuel economy and reduces emissions, supporting cleaner engine performance. When the distributor or ignition system fails, these modules can be internally damaged, leading to ignition issues. Professional installation required for correct fit and OE cross-reference matching. for manufacturer: Bosch