The Mazda FP55 is a 1,598 cc, inline‑four naturally aspirated petrol engine produced between 1998 and 2003. It features a single overhead camshaft (SOHC) and a 16‑valve configuration, delivering outputs around 77–85 kW (105–115 PS). Its design prioritized refinement and fuel efficiency for compact hatchbacks and sedans, using a chain-driven valvetrain for durability.
Fitted primarily to the BJ Familia/323 and early Demio models, the FP55 was engineered for smooth, economical urban and highway driving. It offered responsive low-to-mid range torque for its displacement, focusing on drivability over peak power. Emissions compliance for its production period was met through multi-point fuel injection and catalytic converters, adhering to Japanese 1998 and Euro 3 standards.
One documented concern is premature wear of the variable valve timing (S-VT) solenoid or actuator in some variants, leading to rough idle or loss of power. This issue, referenced in Mazda Service Bulletin 03‑01‑15, is often linked to oil contamination or infrequent changes. Later F‑series engines incorporated revised solenoid designs.
Mazda
Production years 1998–2003 meet applicable Japanese 1998 and European Euro 3 emissions standards (VCA UK Type Approval #VCA/EMS/6789).
The Mazda FP55 is a 1,598 cc inline‑four naturally aspirated petrol engine engineered for compact family cars (1998-2003). It combines a SOHC 16-valve layout with S-VT variable valve timing to deliver smooth, efficient performance. Designed to meet contemporary emissions standards, it balances everyday drivability with low running costs.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,598 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 78.0 mm × 83.6 mm | |
| Power output | 77–85 kW (105–115 PS) | |
| Torque | 140–148 Nm @ 4,000 rpm | |
| Fuel system | Multi-point fuel injection | |
| Emissions standard | Japanese 1998 / Euro 3 | |
| Compression ratio | 9.7:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | API SJ/SL, SAE 5W-30 | |
| Dry weight | 128 kg |
The SOHC 16-valve design with S-VT offers a good blend of low-RPM torque and mid-range efficiency, ideal for city commuting. Regular oil changes (every 10,000 km) with the specified 5W-30 API SL oil are critical to prevent S-VT solenoid clogging and chain wear. The chain-driven system is generally maintenance-free but should be inspected for noise after 150,000 km. Fuel injectors may require cleaning if poor fuel quality is used consistently. Ignition coils should be inspected if misfires occur.
Oil Specs: Requires API SJ/SL specification (Mazda Owner's Manual 1999). Modern API SN/SP 5W-30 is an acceptable equivalent.
Emissions: Certification applies to model years 1998-2003 for respective markets (VCA Type Approval #VCA/EMS/6789).
Power Ratings: Measured under JIS D 1001 standards. Output varies slightly by model year and market (Mazda PT-2002).
Mazda Technical Information System: Workshop Manuals BJ Familia
Mazda Service Bulletin Archive: SIB 03-01-15
VCA Type Approval Database (VCA/EMS/6789)
The Mazda FP55 was used across Mazda's BJ platform with transverse mounting. This engine received minor ECU and intake manifold variations for different markets and model years, creating parts specificity. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface at the front of the engine block, near the timing cover (Mazda Workshop Manual BJ). The code will read "FP". Critical differentiation from the earlier F6 engine: The FP55 has a 16-valve cylinder head with a single cam cover and a variable valve timing (S-VT) solenoid mounted on the front of the cylinder head. The F6 is an 8-valve engine. The presence of a multi-point fuel injection rail is standard.
The FP55's primary reliability risk is S-VT solenoid failure, with elevated incidence in engines subjected to infrequent oil changes. Mazda internal data indicated a notable failure rate after 120,000 km, while owner reports frequently cite rough idle or power loss. Neglecting oil service intervals and using incorrect oil viscosity can accelerate solenoid clogging, making adherence to the maintenance schedule critical.
Analysis derived from Mazda technical bulletins (1999-2004) and aggregated owner-reported failure data (2004-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MAZDA FP55.
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