Throttle body

Part of S58 engine · about $380 to replace

What it is

Electronic 82 mm butterfly at the plenum inlet.

What it does

Meters air into the plenum on command from the ECU; no cable to the pedal.

How it fails

Carbon build-up around the plate causes idle hunting; clean, do not scrape.

Material	Aluminium body, brass butterfly
Spec	Bore 82 mm
	full travel in 100 ms

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