Parts for your 2020 Audi Q5-Crank angle sensor

2020 Audi Q5 crank-angle sensor (crankshaft position sensor, G28)

Technical references including Audi’s official Workshop Manual (ELSA/erWIN) for the FY-series Q5 (MY2020), the Audi ETKA parts catalogue, and Audi Self‑Study Programmes for the EA888 Gen.3B 2.0 TFSI and EA839 3.0 engines all specify a crankshaft position sensor (designation G28). That’s the same component many call a crank-angle sensor. So yes, the 2020 Audi Q5 uses one.

The crank-angle sensor (Audi calls it the crankshaft position sensor, G28) is the timing heartbeat of a 2020 Audi Q5. It reads a toothed reluctor on the crank and feeds the engine control unit precise crank angle and engine speed. With that data, the ECU knows exactly when each piston reaches top dead centre and can fire the spark and inject fuel at the right moment, every time. It also underpins variable valve timing, start/stop, boost control, misfire monitoring, and in hybrids, smooth restarts. Lose the signal and the car will crank without firing, get a noisy or erratic signal and it can misfire, stumble, or drop into limp mode. Because combustion timing is referenced to the crank, this small sensor has a big say in cold starts, idle quality, power, fuel economy, and emissions. It’s a simple, sealed Hall or inductive sensor, but it works in a tough place with heat, oil vapour, and vibration.

Unlike oil or air filters, the crank-angle sensor isn’t a scheduled service item on the Q5, so there’s no replacement interval. It’s checked when there are symptoms or a fault code such as P0335–P0339. Typical giveaways include hard starting, stalling, a dead tachometer while cranking, EPC/MIL lights, or the engine cranking faster than usual but not firing. Before swapping parts, a tech will inspect the wiring and connector for oil wicking or damage, confirm cranking RPM on a scan tool (about 250–400 rpm), and verify the signal with live data.

If replacement is needed, use a quality OEM-equivalent sensor, fit a fresh O‑ring, and lightly oil it so it seats without tearing. Disconnect the battery, keep the area under the bonnet clean, and avoid levering on the sensor boss. On 2.0 TFSI models the sensor sits at the rear of the block near the bellhousing, on the V6 it’s mounted low on the block, accessed from underneath. After installation, clear codes and perform any basic settings the diagnostic tool requests, then road‑test. With quality fuel and regular servicing, the sensor should be a fit‑and‑forget item—keep an eye out for leaks or wiring rub points during routine inspections.

Where is the crank-angle sensor on a 2020 Audi Q5?

On 2.0 TFSI models, it’s at the rear of the engine block near the bellhousing. On the V6, it’s mounted low on the block and usually accessed from underneath after removing the undertray.

What symptoms point to a failing crank-angle sensor?

Hard starting, intermittent stalling, no-start with fast cranking, EPC/MIL warnings, or erratic tachometer behaviour. Scan tools often show codes like P0335–P0339 and zero cranking RPM when the fault is present.

Does a new sensor need coding or calibration?

Generally no. The ECU self-learns the signal. After fitting, clear fault codes and follow any basic settings prompted by the scan tool, then road-test to confirm stable RPM and timing.