How a Failing 0445110239 Bosch 1.6 HDi Injector Presents
On the Bosch-supplied 1.6 HDi run, a failing injector typically presents in two distinct patterns. The first is the classic single-cylinder injector knock at warm idle, often described by drivers as a 'top-end tick' that mimics a worn cam follower. The second is a sudden hard-start episode that lasts five to ten seconds longer than normal — the rail bleeds prime overnight through a leaking injector seat. The third pattern, particular to the Bosch unit (rather than the later Continental DV6C), is intermittent stall at idle on hot restart after a short stop — caused by the seat seal failing as the unit thermally expands.
Because the Bosch 0445110239 was fitted earlier in the production run than the Continental DV6C primary, vehicles arriving at the workshop with this unit installed are usually 12-18 years old and well past 130,000 miles. The pragmatic diagnostic conclusion is that when one Bosch 1.6 HDi injector has failed, the other three are within twelve months of similar behaviour.
