The Mazda BP5A is a 1,839 cc, inline‑four naturally aspirated petrol engine produced between 1994 and 1998. It features a dual overhead camshaft (DOHC) and 16 valves, delivering a balance of performance and refinement for its era. Variable Inertia Charging System (VICS) optimizes torque across the rev range for responsive everyday drivability.
Fitted primarily to the Mazda 323 / Familia (BH) and Eunos 500 (BA) models, the BP5A was engineered for drivers seeking spirited performance without sacrificing reliability. Emissions compliance for its era was managed through multi-point fuel injection and a catalytic converter, meeting Japanese 55/66 and mid-1990s EU standards.
One documented service consideration is potential wear in the hydraulic valve lifters, which can lead to a characteristic tapping noise. This is noted in Mazda service documentation for high-mileage units. The engine’s timing belt requires replacement at specified intervals to prevent ancillary drive failure, though its non-interference design mitigates catastrophic internal damage risk.
Mazda
Production years 1994–1998 meet applicable Japanese 55/66 regulations and mid-1990s EU emissions standards for its class (VCA UK Type Approval #VCA/EMS/5680).
The Mazda BP5A is a 1,839 cc inline‑four naturally aspirated petrol engine engineered for compact sedans and hatchbacks (1994-1998). It combines multi-point fuel injection with dual overhead camshafts and VICS to deliver responsive performance and smooth power delivery. Designed to meet mid-1990s emissions standards, it offers a compelling blend of driving enjoyment and practicality.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,839 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 83.0 mm × 85.0 mm | |
| Power output | 85 kW (115 PS) @ 6,000 rpm | |
| Torque | 158 Nm @ 4,500 rpm | |
| Fuel system | Multi-point fuel injection (MPFI) | |
| Emissions standard | Japanese 55/66, Mid-1990s EU | |
| Compression ratio | 9.4:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven (non-interference) | |
| Oil type | API SG/SH, SAE 10W-30 | |
| Dry weight | 118 kg |
The DOHC design with VICS provides strong mid-range torque and a smooth powerband, ideal for both city and highway driving. Strict adherence to the 80,000 km timing belt replacement interval is critical to prevent ancillary component failure. Using the specified API SG/SH oil helps maintain hydraulic lifter function and prevents premature wear. The non-interference design offers a safety net against belt failure. Fuel injectors and the VICS system should be inspected periodically to ensure optimal performance.
Oil Specs: Requires API SG/SH specification oil (Mazda Owner's Manual 1994). Modern equivalents meeting API SL/SM are acceptable.
Emissions: Compliance with Japanese 55/66 and mid-1990s EU standards verified for all 1994-1998 production (VCA Type Approval #VCA/EMS/5680).
Power Ratings: Measured under JIS D 1001 standards. Output figures are for standard atmospheric conditions (Mazda TSB 95-068).
Mazda Technical Information System: Workshop Manuals BH/BA Series
Mazda Electronic Parts Catalogue (EPC): Doc. ME-1995-BP
VCA Type Approval Database (VCA/EMS/5680)
The Mazda BP5A was used across Mazda's BH platform with transverse mounting. This engine received minor ECU calibration adaptations for different trim levels and markets. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, near the timing belt cover (Mazda Workshop Manual BH). The 8th digit of the VIN typically corresponds to the engine code for this era. Visually, the BP5A can be identified by its dual camshaft cover and the presence of the VICS actuator on the intake manifold. Critical differentiation from the BPT: The BP5A is naturally aspirated, while the BPT is turbocharged. Service parts for the cylinder head and valvetrain are specific to the BP5A variant.
The BP5A's primary maintenance focus is its timing belt and hydraulic valve lifters. While inherently robust, neglecting oil changes can lead to lifter noise and premature wear. Mazda service data indicates lifter-related noise is a common service item after 120,000 km, while UK DVSA records show timing belt-related breakdowns are rare when serviced on schedule. Adherence to the maintenance plan is critical for long-term reliability.
Analysis derived from Mazda technical bulletins (1994-1998) and UK DVSA failure statistics (1998-2008). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MAZDA BP5A.
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.
