13 53 Fuel Injection Nozzles and Pipes (N54 / N53 / N51)

WARNING: This page does not describe the selected car, but rather 19 other vehicles, including the 2013 BMW 328xi, 2013 BMW 328i, 2012 BMW 328xi, 2012 BMW 328i, and 2011 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

TIGHTENING SPECIFICATION - FUEL INJECTION NOZZLES AND PIPES

	Type	Thread	Tightening specification	Measure
1AZ High-pressure rail to cylinder head	N54, N53	M7 x 16		13 ± 2 Nm
2AZ High-pressure line to cylinder head	N54, N53	M7 x 16		13 ± 2 Nm
3AZ High-pressure fuel sensor	N54, N53	M10		30 - 5 Nm
4AZ Low-pressure fuel sensor	N54, N53	M10		20 - 3 Nm
5AZ Holding-down element to cylinder head	N54, N53	M7 x 20		13 ± 2 Nm
6AZ Feed line to high-pressure pump	N54, N53	M14	Special tightening torque!	23 ± 3 Nm
7AZ High-pressure line to rail and high-pressure pump	N54, N53	M14		30 ± 3 Nm
8AZ High-pressure lines to rail and injector	N54, N53	M12		23 ± 3 Nm
9AZ Fuel feed line	N54, N53	M8 x 17	Replace screw
			1. Tightening	10 Nm
			2. Angle-of-rotation tightening	90° ± 15°
10AZ Bracket, fuel line, to engine support frame	N54, N53	M6 x 12		8 Nm
11AZ Fuel line to fuel rail	N51	M14		30 ± 6 Nm