Mazda CX-5 Slave Clutch Cylinder: Specs, Fitment & Common Faults

The other half of the hydraulic clutch system, and the faults that get mistaken for a failing master cylinder.

Illustration of a hydraulic cylinder component

Illustration for editorial purposes

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Mazda CX-5 Slave Clutch Cylinder reference plate

OEM Part Number: BP4S-41-920D

Accuracy note: confirmed below via a genuine Mazda dealer parts catalogue. This part number has been superseded at least twice (920B → 920C → 920D), so an older reference may still turn up in some listings — the D suffix is the current one. Applies to manual-transmission CX-5s only.

Manual transmission (current reference)	Mazda OEM: BP4S-41-920D
Manual transmission (superseded references)	BP4S-41-920B / BP4S-41-920C — may still appear on older listings

Mazda CX-5 Slave Clutch Cylinder: Easy to Confuse With Its Partner Component

On the Mazda CX-5, the master and slave clutch cylinders work as a pair, and symptoms of failure look almost identical from the driver's seat — a soft pedal, a clutch that won't disengage properly — which means diagnosing which one has actually failed usually needs a proper inspection rather than guesswork.

Before you buy: some versions of the CX-5 use an internal slave cylinder built into the gearbox, others use an external unit — these are not interchangeable. Always confirm against your VIN before ordering.

Mazda CX-5 Slave Clutch Cylinder: What It Does

The slave cylinder receives hydraulic pressure from the master cylinder and uses it to physically push the clutch release mechanism, disengaging the clutch when the pedal is pressed. On many modern cars including several versions of the CX-5, this is built inside the transmission housing as a "concentric slave cylinder," which changes both the part itself and the labour involved in replacing it.

Fitment & Compatibility

Whether the CX-5 uses an internal (concentric) or external slave cylinder depends on the specific generation and transmission — these two designs are not interchangeable, and use entirely different part numbers and replacement procedures. Always confirm which type your specific car uses before ordering. Whether you're sourcing a replacement slave clutch cylinder for your Mazda CX-5 from a dealer, specialist, or online marketplace, always check compatibility against your registration or VIN before buying.

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Mazda CX-5 Slave Clutch Cylinder: Symptoms, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Slave Clutch Cylinder Guide for symptoms of failure, how difficult this job is to DIY, and aftermarket advice.