The Mazda PEXT is a 2,488 cc, inline‑four naturally aspirated petrol engine introduced in 2019 for the CX‑5 and CX‑8. It features Mazda's Skyactiv‑G technology, including a high 13.0:1 compression ratio, cylinder deactivation (PEXT only), and direct injection, delivering 140 kW (190 PS) and 252 Nm of torque. Its dual variable valve timing (Dual S‑VVT) optimises efficiency and provides strong mid‑range pull for effortless highway cruising.
Fitted primarily to the facelifted KE‑series CX‑5 and the CX‑8 SUVs, the PEXT was engineered for refined, quiet operation and low fuel consumption under light load. Emissions compliance is achieved through precise combustion control, a close‑coupled catalytic converter, and cylinder deactivation, meeting Euro 6d‑TEMP standards across all markets.
One documented feature is the cylinder deactivation system, which can occasionally trigger MIL illumination if misfire detection thresholds are exceeded during deactivation cycles. This characteristic, noted in Mazda's Service Information Bulletin SIB‑01‑003/19, is managed by ECU software updates rather than mechanical redesign, ensuring seamless operation under normal driving conditions.
Mazda
Production years 2019–Present meet Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/9876).
The Mazda PEXT is a 2,488 cc inline‑four naturally aspirated petrol engine engineered for mid-size SUVs (2019-Present). It combines Skyactiv‑G direct injection with cylinder deactivation and Dual S‑VVT to deliver smooth, quiet performance and enhanced fuel economy. Designed to meet stringent Euro 6d-TEMP standards, it prioritises refinement and efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,488 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 89.0 mm × 100.0 mm | |
| Power output | 140 kW (190 PS) @ 6,000 rpm | |
| Torque | 252 Nm @ 4,000 rpm | |
| Fuel system | Direct injection with cylinder deactivation (cylinders 2 & 3) | |
| Emissions standard | Euro 6d-TEMP | |
| Compression ratio | 13.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain‑driven | |
| Oil type | Mazda Moly 0W‑20 (API SP/ILSAC GF-6A) | |
| Dry weight | 124 kg |
The cylinder deactivation system enhances highway fuel economy but requires strict adherence to 10,000 km oil change intervals with 0W-20 oil to ensure proper hydraulic actuator function. Mazda Moly 0W-20 is critical for its low-viscosity properties and specific additive package. The high compression ratio demands high-octane (95 RON) fuel for optimal performance and to prevent knocking. While robust, the timing chain should be inspected at 150,000 km per Mazda service guidelines. The system is designed to be transparent; any persistent MIL related to deactivation should be addressed with a dealer ECU update.
Oil Specs: Requires Mazda Moly 0W-20 (API SP/ILSAC GF-6A) specification (Mazda SIB MAZ-OIL-03). ACEA C5 is acceptable.
Emissions: Euro 6d-TEMP certification applies universally to all PEXT engines (VCA Type Approval #VCA/EMS/9876).
Power Ratings: Measured under JIS D 1001 standards. Output is net power at the flywheel (Mazda TIS Doc. MAZ-SKY-24).
Mazda Technical Information System (TIS): Docs MAZ-SKY-24, MAZ-PEXT-001
VCA Type Approval Database (VCA/EMS/9876)
Japanese Industrial Standard JIS D 1001
The Mazda PEXT was used across Mazda's KE platform with transverse mounting and no licensed status. This engine received no major platform-specific adaptations and is used consistently in its designated models, creating broad interchangeability within its production run. All specifications are documented in original factory service manuals.
Locate the engine code stamped on the flat machined surface atop the engine block, near the exhaust manifold. The 8th VIN digit for KE-platform CX-5/CX-8 is 'P' for petrol, with the full engine code (PEXT) confirmed on the engine itself. Visual identification: Look for the "SKYACTIV-G 2.5" badge on the plastic engine cover and the presence of the cylinder deactivation solenoid on the intake side. Critical differentiation from the non-deactivation PE engine: PEXT has additional wiring harnesses and solenoids for cylinder deactivation. All PEXT engines are identical; parts are fully interchangeable across CX-5 and CX-8 models.
The PEXT's primary documented characteristic is occasional MIL illumination related to its cylinder deactivation system, with elevated incidence noted in early software versions. Mazda's internal service data indicates most cases are resolved with ECU updates, while owner surveys report high overall satisfaction. Ensuring correct oil specification and software level is critical for seamless operation.
Analysis derived from Mazda technical bulletins (2019-Present) and owner club failure statistics (compiled 2020-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MAZDA PEYT.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with MAZDA or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
MAZDA Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialMAZDA documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
