Fuel rail

Part of S58 engine · about $520 to replace

What it is

High-pressure rail feeding the six direct injectors.

What it does

Holds a reservoir of petrol at up to 350 bar so each injector sees stable pressure.

How it fails

Never crack a fitting with residual pressure; the ECU bleeds the rail on shutdown.

Material	Forged stainless steel
Spec	Operating pressure 200–350 bar
	volume 45 ml

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