Parts for your 2017 Mazda Cx-5-Crank angle sensor

2017 Mazda CX-5 crank-angle sensor: what it does and when to replace it

Based on technical sources such as the Mazda CX-5 (KF, 2017–) Workshop Manual under Engine Control – Crankshaft Position (CKP) Sensor, Mazda Global Service Support diagnostic listings for DTCs P0335/P0336, and Mazda parts cataloguing for the KF series, the 2017 Mazda CX-5 is fitted with a crank-angle sensor (commonly called the crankshaft position or CKP sensor) on both SKYACTIV-G petrol and SKYACTIV-D diesel engines. It’s a core input for the powertrain control module, so it’s absolutely relevant to this model year.

The crank-angle sensor tracks the exact position and speed of the crankshaft using a toothed reluctor wheel and a Hall-effect sensor. With that signal, the ECU times fuel injection, spark, and monitors misfire. It also works with the camshaft sensor for precise synchronisation, which is critical for the CX-5’s SKYACTIV engines to deliver smooth idle, strong torque, and clean emissions.

When the sensor or its wiring starts playing up, drivers may notice long crank or a no-start, intermittent stalling, rough idle, drop-outs in the tacho, and the check engine lamp with codes like P0335/P0336. Because the CKP signal is mission-critical, a completely failed sensor will normally prevent the engine from starting.

It isn’t a scheduled replacement item, but it’s smart to give it a look during major services:

• Inspect the sensor connector and harness near the front of the engine/bellhousing area for chafe, oil contamination, or bent pins.
• Check for oil leaks that could wick into the connector. Clean with proper electrical contact cleaner only.
• If removed, replace the O-ring and seat the sensor squarely, the air gap isn’t adjustable, so correct fitment matters.
• After replacement, clear fault codes and verify live data, some vehicles may perform an idle relearn automatically after a short drive cycle.

When replacing the CKP sensor on a 2017 CX-5, use a quality OEM-equivalent part and follow the workshop manual for torque specs and routing. Avoid pulling on the loom under the bonnet, these wires live near heat and vibration, so tidy clipping is important. If faults persist after fitting, check the cam sensor and reluctor wheel condition as they work as a team. For owners in Australia and New Zealand, a quick scan with a capable tool before and after the job saves guesswork and confirms the sensor is reporting clean, stable RPM.

Popular questions

Where is the crank-angle sensor on a 2017 Mazda CX-5?
It’s mounted on the engine block facing a toothed wheel on the crankshaft, typically low on the block near the transmission bellhousing area. Access is from above or below depending on engine variant. A torch helps to spot the small two-wire or three-wire sensor with a single retaining bolt and a sealed connector.

On both SKYACTIV-G and SKYACTIV-D engines, it reads crank speed and position. If you’re tracing a wiring issue, follow the harness from the front of the engine along the block, keeping an eye out for chafe points near brackets.

How often should a crank-angle sensor be replaced on a 2017 CX-5?
There’s no fixed interval. It’s a replace-on-failure part. Many last the life of the vehicle, but heat, vibration, oil contamination, or wiring damage can shorten their run. If you see P0335/P0336, intermittent stalling, or a dead tacho during cranking, test it and replace if out of spec.

As a preventive step during major services, inspect the connector and loom and fix leaks that might soak the sensor. That’s often all it needs to stay reliable.

Can you drive a 2017 CX-5 with a faulty crank-angle sensor?
If the sensor is failing intermittently, the engine may run but stall or lose power unexpectedly, which isn’t safe. If it fails completely, the engine usually won’t start at all. It’s best to diagnose promptly and avoid long trips until the fault is sorted.

After repairs, clear codes and road-test while monitoring live RPM to confirm a stable signal and proper sync with the cam sensor.