Nissan: Poor design causes injectors' failure

Thousands of Nissan owners have to spend a lot of money to replace the bad
fuel injectors. The main symptom is higher resistance of injectors which
causes injectors' failure. I have several injectors with the exactly similar
problem.



I just spent a few hours to disassemble a bad one and found the reason: a
pool design of the injection between the solenoid coil and the output leg.
Just a spot weld is applied to this contact surface and it is very easy to
be broken at the early age; which will cause higher resistance or
disconnection. This is not strange that some owners reported new injectors
can
only last several 10k miles and had to replace.



I would like to provide some pictures to illustrate my discovery if anyone
has interesting.