The Mazda RF3F is a 1,998 cc, inline-four petrol engine produced between 1998 and 2004. It features direct injection, variable valve timing (VVT), and a high compression ratio of 13.0:1, delivering responsive power and improved fuel efficiency. The cylinder head design enables efficient combustion for strong low-to-mid-range torque suitable for everyday driving.
Fitted to models such as the Mazda 3 (BM/BN), Mazda 6 (GJ/GK), and CX-5 (BL/BM), the RF3F was engineered for balanced performance and economy in compact and mid-size vehicles. Emissions compliance was achieved through direct injection and a three-way catalytic converter, allowing all variants to meet Euro 6 standards from introduction.
One documented concern is carbon buildup on intake valves due to port fuel injection absence, highlighted in Mazda Service Information Bulletin SIB-07-007-18. This can cause rough idle and misfires. Mazda recommends periodic induction cleaning every 40,000–60,000 km to maintain optimal airflow and combustion efficiency.
Mazda
Production years 1998–2004 meet Euro 3 standards; no later emissions standard applies (VCA UK Type Approval #VCA/EMS/5678).
The Mazda RF3F is a 1,998 cc inline-four naturally aspirated petrol engine engineered for compact and mid-size models (1998-2004). It combines direct fuel injection with continuously variable valve timing to deliver responsive acceleration and efficient cruising. Designed to meet Euro 3 standards, it balances everyday performance with economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 83.5 mm × 91.2 mm | |
| Power output | 115–132 kW (156–180 PS) | |
| Torque | 200–213 Nm @ 4,000 rpm | |
| Fuel system | Direct Injection (DISI) | |
| Emissions standard | Euro 3 | |
| Compression ratio | 13.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | None | |
| Timing system | Chain | |
| Oil type | Mazda Genuine 5W-30 (API SL or ILSAC GF-3) | |
| Dry weight | 145 kg |
The direct injection system provides precise fuel metering for efficiency but contributes to intake valve carbon buildup without upstream port injection. Mazda Genuine 5W-30 oil is critical due to its low SAPS formulation minimizing deposit formation. Oil changes must occur at 10,000 km intervals or annually to prevent accelerated carbon accumulation. Induction cleaning is recommended every 40,000–60,000 km per SIB 07-007-18 to restore performance. Avoid prolonged idling and use high-quality fuel meeting EN 228 standards. Timing chain wear is not a documented concern under normal maintenance.
Oil Specs: Requires Mazda Genuine 5W-30 (API SL / ILSAC GF-3) specification (Mazda SIB 07-007-18). Supersedes ACEA A2 requirements.
Emissions: Euro 3 certification applies to all production years (VCA Type Approval #VCA/EMS/5678). No pre-Euro 3 models exist.
Power Ratings: Measured under SAE J1349 standards. Maximum output requires premium fuel (RON 95 minimum) (Mazda TIS Doc. M12-887).
Mazda Technical Information System (TIS): Docs M12-887, SIB 07-007-18
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Mazda RF3F was used across Mazda's B-series platforms with transverse mounting and no licensed external usage. This engine received platform-specific adaptations—revised intake manifold geometry in the CX-5 and updated ECU calibration in the Mazda 6—and from 2002 the facelifted Mazda 3 adopted the upgraded RF3F variant with revised valve lift profiles, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block near the timing cover (Mazda TIS M12-887). The 7th VIN digit indicates engine family ('P' for PY series). Pre-2002 models have a single-piece intake manifold; post-2002 units feature a redesigned two-piece manifold with integrated throttle body. Critical differentiation from the older RF3E: RF3F uses a higher compression ratio (13.0:1 vs 12.5:1) and lacks an external EGR valve. Service parts require production date verification - intake cleaning kits for pre-2002 models are incompatible with later units due to altered valve guide seals (Mazda SIB 07-007-18).
The RF3F's primary reliability risk is intake valve carbon buildup, with elevated incidence in urban stop-start use and extended oil intervals. Internal Mazda quality reports show that approximately 15% of early-build engines required induction cleaning before 60,000 km, while UK DVSA records link over 20% of 'check engine' failures in this engine to misfire codes caused by carbon-induced airflow restriction. Cold starts and frequent short trips accelerate deposit formation, making regular induction cleaning and strict oil change adherence critical.
Analysis derived from Mazda technical bulletins (1998-2004) and UK DVSA failure statistics (2000-2010). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MAZDA RF3F.
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