What It Is
The N290 fuel metering valve (FMV) for TDI engines equipped with the Bosch CP4 high pressure fuel pump. All 2009-and-later North American market TDIs run the Bosch CP4 HPFP, so this valve applies broadly across that generation.
A Useful Diagnostic Clue
HPFP failure is a well-documented problem on these engines, but it isn't always the cause behind a stored fuel rail pressure fault. If your common rail TDI has a rail pressure fault code but you don't see metal glitter under the FMV/N290 (a sign of an actual HPFP failure), the fuel metering valve itself is the more likely culprit.
Fitment
2009 and later North American TDI models with the CBEA, CJAA, or CKRA engine.
Common Questions
How do I know if it's my FMV or my HPFP causing the rail pressure fault?
Check for metal glitter under the FMV/N290. If you don't see any evidence of HPFP failure but still have a rail pressure fault, the fuel metering valve is the more likely cause.
Is this a genuine Bosch part?
Yes, this is the genuine Bosch N290 fuel metering valve.
Does this fit older PD engines?
No, this valve is specific to Bosch CP4 HPFP-equipped common rail engines (CBEA, CJAA, CKRA), found on 2009-and-later TDIs.
