Glow plug for ALL common rail TDI motors, both 4 and 6 cylinder models.
This plug has an integrated cylinder pressure sensor.
All 4-cylinder motors take 4 of these plugs - including CBEA, CJAA, CKRA, CVCA and CRUA.
The V6 used a mixed-plug configuration where some cylinders use this sensor plug and others use a non-sensor plug.