2.5L Engine Complete Assembly with Cylinder Deactivation for 2023-2024 Mazda
Product Notes Read before buying
Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.
Vehicle Fitment Guide
This part fits the following vehicles:
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 2.5 S | SUV | 2023 - 2024 | L4 2.5L | AWD | Automatic |
| 2.5 S Carbon Edition | SUV | 2023 | L4 2.5L | AWD | Automatic |
| GS | SUV | 2023 - 2024 | L4 2.5L | AWD | Automatic |
| GT | SUV | 2023 - 2024 | L4 2.5L | AWD | Automatic |
| i Grand Touring | SUV | 2023 - 2024 | L4 2.5L | FWD | Automatic |
| I Sport | SUV | 2023 - 2024 | L4 2.5L | FWD | Automatic |
| GX | SUV | 2024 | L4 2.5L | AWD | Automatic |
Know This Engine Before You Buy
The research behind our purchase interview — recalls, bulletins and real install economics for this engine family:
A quick look at your own vehicle makes sure the right engine shows up:
- Verify your VIN's 8th Digit: Confirm that the 8th digit is 'M' on your driver's side dashboard or door jamb sticker.
- Confirm your Drivetrain Type: Check if your vehicle is AWD or FWD to determine if you need to swap the oil pan and mounting brackets.
- Check for Turbo: Open your hood and confirm your engine is naturally aspirated (non-turbo).
- Locate the Engine Code: Verify that the stamped code on the rear of the engine block near the transmission starts with 'PY'.
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Engine hoist/crane with a heavy-duty load leveler
- Flywheel/drive plate locking tool
- High-pressure fuel system disconnect tools
- Professional-grade diagnostic scan tool (Mazda M-MDS or bi-directional equivalent)
- Powertrain support table / vehicle lift
Budget for these consumables at install:
- Engine Oil (approx. 4.8 quarts of API-certified 0W-20 full synthetic oil)
- Premium spin-on oil filter
- Engine Coolant (fresh Mazda FL-22 long-life pre-diluted coolant)
- Spark Plugs (fresh set of OE-spec Iridium spark plugs)
- Intake and exhaust manifold gaskets
- Thermostat and Coolant Control Valve O-rings
- Front and rear crankshaft main seals
- High-pressure fuel pump O-ring and fuel injector seals
- Serpentine/drive belt
- One-time-use crankshaft pulley (harmonic balancer) stretch bolt
- One-time-use high-pressure fuel line crush washers and seals
What your vehicle’s computers will need after the swap:
What’s involved: Crankshaft Position (CKP) Sensor Relearn, Throttle Body Idle Air Volume Learn, Coolant Control Valve (CCV) Initialization, and Immobilizer/Security Relearn
A dealer-level scan tool (such as Mazda's M-MDS) or a high-end bi-directional scan tool is required to perform the CKP sensor profile learn, CCV initialization, and reset the immobilizer system to re-marry the keys to the vehicle's Body Control Module (BCM) and new engine components.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- AWD vs. FWD Oil Pan and Brackets: If swapping between AWD and FWD models, you must swap the oil pan and the rear engine mounting brackets from your old engine. The AWD oil pan has specific clearance cutouts and mounting bosses for the Power Take-off Unit (PTU/transfer case).
- Fragile Cylinder Deactivation Solenoids: The plastic connectors on top of the cylinder head are highly fragile and crack easily.
- Coolant Control Valve (CCV) Handling: The plastic CCV on the side of the engine is very delicate. Never use it as a handhold or leverage point when lifting or positioning the engine.
- High-Pressure Fuel System Safety: The direct injection fuel system operates under extremely high pressure. You must safely bleed the fuel pressure before opening any lines and use brand-new, one-time-use seals.
- Engine Removal Process: The factory procedure specifies removing the engine and transaxle assembly together from underneath the vehicle, which requires a vehicle lift and a proper powertrain support table.
Easy to get right once you know them:
- The 'M' vs. 'L' VIN Code Mix-up: Ordering this engine (which has cylinder deactivation, VIN 8th digit 'M') for a vehicle built without cylinder deactivation (VIN 8th digit 'L'). They use completely different cylinder heads, wiring harnesses, and engine computer calibrations.
- Reusing Torque-to-Yield (TTY) Bolts: Reusing the crankshaft pulley (harmonic balancer) bolt, which is a stretch bolt designed for one-time use.
- Improper Cooling System Bleeding: Failing to use a vacuum-assisted coolant refiller or follow the strict OEM multi-step bleeding procedure, leading to trapped air pockets and immediate overheating.
- Ignoring the Immobilizer: Underestimating the security system and failing to arrange for key and module reprogramming before starting the job.
- Reusing Old Gaskets and Seals: Reusing critical single-use gaskets and seals, which causes post-install vacuum and coolant leaks.
- Incorrect Fluid Type: Using generic green/orange coolants or incorrect oil weights instead of Mazda FL22 coolant and 0W-20 synthetic oil.
Not issues with the units on this page — the manufacturer documented these for every engine of this family, wherever you buy one. Handy for your installer:
🔎 Recommended at install: Mazda issued a special warranty extension (SSPD8) up to 15 years or 150,000 miles. They also introduced a thermostat replacement kit (Part # PYY2-15-SA1) so the entire expensive CCV assembly does not need to be replaced.
🔎 Recommended at install: The timing cover must be removed, cleaned, and resealed using fresh high-temp silicone sealant.
🔎 Recommended at install: Mazda established a newly redesigned service cylinder head assembly (including pre-installed valves, springs, and lifters) to address these failures.
🔎 Recommended at install: Vibrations produced when transitioning between 2-cylinder and 4-cylinder modes can cause premature wear on the torque converter's lock-up clutch. Requires transmission fluid inspection and potential torque converter replacement.
Researched from factory recalls, TSBs and OEM service data (reference unit 300-10535-5336469). Unit-specific details — mileage, condition, warranty, freight — are covered in the checkout interview.
Policies, in plain English.
Shipping & Handling
- Ships by LTL freight on a pallet — a real freight truck, not a parcel van
- Your checkout freight quote covers delivery to your door (liftgate service included for residential addresses)
- The carrier calls ahead to schedule a delivery window — someone must be present to receive it
- Typically palletized and picked up within 2–3 business days; transit time depends on distance
120-Day Warranty
This part includes a 120-day warranty.
- If the part fails within the warranty window, we'll replace it or refund per the coverage terms
- Coverage is parts-only — installation labor is not included
- Warranty covers defects — not installation errors, misuse, or damage after installation
Your pre-purchase interview reviews these exact terms with you before anything is charged.
Returns (30 Days)
We accept returns of uninstalled parts within 30 days of delivery for this part.
- Defective parts: We will replace the part or issue a refund at our discretion
- Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
- Return shipping: This part ships by freight (LTL) — the part price is refundable per the terms above, but shipping costs are non-refundable and return freight follows the seller's return terms. Your pre-purchase interview walks through the exact numbers before you buy
- Parts must be returned in original packaging and unmodified condition
- Poorly packaged returns that arrive damaged will not be credited
Damaged in Shipping?
Freight damage is rare — and you're fully protected when you do two things at delivery:
- Inspect before you sign — you're allowed time to look the pallet over while the driver waits
- Write any damage on the delivery receipt before signing — that one line is what makes a freight claim succeed
- Severe damage? Refuse the delivery — it goes back at no cost to you and we make it right
- Photograph the pallet before unwrapping; report concealed damage within 24 hours of delivery
We handle the carrier claim — you just help document it. Your pre-purchase interview walks through this checklist too.
Order Cancellation
Cancel before shipment for a full refund. Once the pallet has been built, a preparation charge may apply — and once the freight carrier picks it up, shipping costs are non-refundable and standard return terms apply. Your pre-purchase interview shows the exact numbers before you pay.
Expert Guides
2023-2024 Mazda CX-30 2.5L Skyactiv-G: Problems, Identification, and Used Replacement
Identify the exact VIN 'M' cylinder deactivation engine, learn what causes catastrophic failures, and discover what to look for when buying a used replacement unit.
Read Full Guide →Related Trouble Codes (OBD-II)
3 matching guidesIf your scan tool is showing one of these trouble codes, this part is a common fix. Each guide explains the code, how to diagnose it, and exactly what to replace.
Miscellaneous Information
OEM Part Numbers:
Mazda: PYZV02300C
Fits Years: 2023 2024
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Backed By The Selling Yard
This unit ships with the selling yard's 120-day warranty. Longer plans can be requested during checkout.
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