Stuck Banjo Bolt on Fuel Line No. 1 Under Intake Manifold

The banjo bolt connecting fuel line no. 1 (fuel supply line under the intake manifold that feeds the fuel rail) was seized due to corrosion and could not be loosened. Attempting to turn the bolt risked twisting the fuel tube assembly.

Corrosion and seizing of the banjo bolt threads over time due to heat and moisture exposure in the underhood environment beneath the intake manifold.

Moderate confidence — Original poster confirmed this resolved the issue