Parts for your 2013 Mazda 3-Crank angle sensor

2013 Mazda 3 crank-angle-sensor — what it does and when to sort it

Referencing Mazda’s own technical sources, the 2013 Mazda 3 is fitted with a crank-angle-sensor (more commonly called a crankshaft position or CKP sensor). The BL Series Workshop Manual (Engine/Powertrain Control System) identifies the CKP as a primary input for ignition and injection timing on both MZR (2.0/2.5) and SkyActiv-G 2.0 engines. Mazda’s Electronic Parts Catalogue also lists the crank-angle-sensor for this model year with typical OEM part numbers such as PE01-18-221/PE01-18-221A (SkyActiv-G 2.0) and L3K9-18-221 (MZR engines). So yes — this sensor is absolutely relevant and used on the 2013 Mazda 3.

On a 2013 Mazda 3, the crank-angle-sensor keeps the engine management in lockstep with the crank’s exact position and speed. The PCM uses that signal to fire the coils and injectors right on cue, and to sync up with the cam sensor. If the CKP signal goes missing or messy, the car can be hard to start, run rough, stall at the lights, or throw the MIL on with codes like P0335–P0339.

As part of regular servicing, the crank-angle-sensor isn’t a scheduled replacement item, but it’s worth a quick look while under the bonnet. Check the connector for oil wicking or green crust on the pins, make sure the harness isn’t rubbing on the pulley or exhaust, and keep any oil leaks from soaking the sensor. A squirt of proper electrical contact cleaner on the connector during major services doesn’t hurt.

Replacement is straightforward for most driveways and mobile mechanics. Typical steps are to disconnect the battery, unplug the connector, remove the retaining bolt, and swap the sensor, lightly oiling the O-ring if fitted. Always route the loom as per factory clips and torque the fastener to spec so it doesn’t work loose. Some cars may need a crank/cam relearn with a scan tool, others will self-adapt after a short drive cycle. If the light returns, check for damaged wiring or poor earths before blaming a new sensor.

When choosing parts, a quality OEM-equivalent CKP is the go — cheapies can cause intermittent no-starts or phantom misfires. If the car has racked up big kilometres or has heat-soak history, proactive replacement during timing or front-end service can save future headaches.

• Common symptoms: long crank, sudden stall, no-start, rough idle, limited power, MIL on with CKP codes.
• Service tips: inspect wiring/connector, keep oil leaks in check, avoid metal debris sticking to the tip, confirm cam sensor health too.

Popular questions

Where is the crank-angle-sensor on a 2013 Mazda 3?
On most 2013 Mazda 3 engines, the CKP sits low on the engine near the crank pulley/harmonic balancer or mounted to the block reading a toothed reluctor. Access is usually from the wheel arch or underneath after removing the splash shield.

What are the signs the crank-angle-sensor is failing?
Expect hard starting, random stalling, or a dead-crank/no-start with spark and fuel cuts. The dash may show the check engine light with codes like P0335. Intermittent heat-related cut-outs after a longer drive are classic CKP behaviour.

Do I need a relearn after replacing the sensor?
Many 2013 Mazda 3s will adapt on their own after a few minutes of idling and a normal drive. If a relearn is required, a scan tool can run a quick crank/cam correlation. If problems persist, double-check the connector, wiring, and engine earths.