Parts for your 2017 Audi Q5-Crank angle sensor

2017 Audi Q5 crank-angle sensor: what it does and how to look after it

Based on Audi factory service information (erWin/ELSA), the ETKA parts catalogue, and Bosch engine management documentation for MED17 (petrol) and EDC17 (diesel) systems, the 2017 Audi Q5 is fitted with a crank-angle sensor, listed by Audi as the engine speed sensor G28. It’s present on the 2.0 TFSI, 3.0 TDI and related engines, and is essential for ECU control of spark and fuel. So yes, it’s relevant and used on the 2017 Q5.

On this Q5, the crank-angle sensor reads a toothed wheel on the crankshaft to report exact crank position and rpm. The ECU pairs that signal with the cam sensor to sync injection and, on petrol engines, ignition timing. If the signal drops out, the engine may crank without starting, stall at idle, or fall into limp mode, and the ECU will usually log a P0335-series fault.

It’s a sealed, solid-state part with no scheduled maintenance. During regular servicing, the smart move is a quick visual check: confirm the harness isn’t chafed, the connector is clean and latched, and there’s no oil wicking along the wiring. Heat and vibration can fatigue internal electronics over big kilometres, so intermittent hot no-starts are a classic clue.

• Common symptoms: long crank/no-start, sudden stall when warm, tach needle dropping to zero, rough running, and stored DTCs like P0335/P0336.
• Location: typically mounted at the bellhousing or low on the block, reading the flywheel/reluctor.

Replacement is straightforward but fiddly due to access. A competent tech will disconnect the battery, raise the vehicle, unplug the sensor, remove the retaining bolt, and ease out the sensor (mind the O-ring). Fit the new unit with a light smear of fresh engine oil on the seal, torque the bolt to spec, route the loom correctly, and clear fault codes. Coding isn’t required, the ECU self-adapts, though some workshops run basic settings afterwards. Using a genuine or high-quality OE brand sensor is worth it—the ECU on these Audis is picky about signal quality.

There’s no fixed interval to replace the crank-angle sensor, it’s replaced on condition. If the Q5 shows the tell-tale symptoms above, testing with a scan tool and an oscilloscope trace (as outlined in Audi ELSA and Bosch test procedures) will confirm it before parts go in.

• Does a 2017 Audi Q5 have a crank-angle sensor?
  Yes. Audi’s service literature lists it as the engine speed sensor G28. It’s fitted to all 2017 Q5 engines and is vital for engine timing and start-up.
• Can a failing crank-angle sensor cause hot no-starts?
  It can. Heat-soaked sensors may drop signal when warm, leading to cranking without fire, random stalls, or cutting out at idle, usually with a P0335-series code.
• Does a new sensor need coding?
  No coding is needed on the 2017 Q5. After installation, clear fault codes and the ECU will relearn automatically, some workshops run basic settings as good practice.