The Mazda B3 (16V) is a 1,324 cc, inline‑four naturally aspirated petrol engine produced between 1989 and 1994. It features a dual overhead camshaft (DOHC) design with four valves per cylinder, delivering a balance of efficiency and responsiveness. Output varied by market, typically ranging from 63 kW (85 PS) to 77 kW (105 PS), with torque figures around 105–110 Nm.
Fitted primarily to the Mazda 323 (BF/BA series) and its variants like the 323F hatchback and 323 Astina, the B3 (16V) was engineered for agile, economical urban and highway driving. Emissions compliance for its era was managed through electronic fuel injection and a basic catalytic converter system.
One documented service consideration is the potential for camshaft seal leaks on higher-mileage units, which can lead to oil consumption and contamination of the timing belt area. This is addressed in Mazda service documentation, recommending inspection during major services and replacement if seepage is evident.
Mazda
Production years 1989–1994 meet applicable emissions standards for their respective markets at time of manufacture (Mazda Technical Service Information).
The Mazda B3 (16V) is a 1,324 cc inline‑four naturally aspirated petrol engine engineered for compact hatchbacks and sedans (1989-1994). It combines DOHC 16-valve architecture with electronic fuel injection to deliver responsive performance and good fuel economy. Designed to meet the emissions regulations of its production era, it offers a practical and tunable powertrain.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,324 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 71.0 mm × 83.6 mm | |
| Power output | 63–77 kW (85–105 PS) | |
| Torque | 105–110 Nm @ 4,000–5,000 rpm | |
| Fuel system | Electronic Fuel Injection (EFI) | |
| Emissions standard | Market-specific (Pre-Euro standards) | |
| Compression ratio | 9.4:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven | |
| Oil type | SAE 10W-30 or 10W-40 (API SG/CD) | |
| Dry weight | Not publicly specified |
The DOHC 16-valve design provides a rev-happy character ideal for city driving and spirited acceleration, but requires strict adherence to the 60,000 km timing belt replacement interval to prevent catastrophic engine failure. Using the specified SAE 10W-30/40 oil is critical for maintaining hydraulic tappet function and overall engine longevity. The non-interference design offers a safety margin if the timing belt fails, though valve damage is still possible. Regular inspection of the camshaft seals is advised to prevent oil from contaminating the timing belt.
Oil Specs: Requires SAE 10W-30 or 10W-40 meeting API SG/CD specification (Mazda Owner's Manual BF Series). Modern equivalents like API SN are acceptable if viscosity is correct.
Emissions: Pre-Euro certification applies to all models (Mazda Technical Service Information). Specific standards vary by country of sale.
Power Ratings: Measured under JIS or DIN standards depending on market (Mazda Global Product Catalogue 1992). Output varies by ECU mapping and regional emissions tuning.
Mazda Electronic Parts Catalogue (EPC): Doc. B3-16V-SPEC
Mazda Workshop Manual: BF/BA Series 323
Mazda Owner's Manual: BF Series 323
Mazda Global Product Catalogue (1992)
The Mazda B3 (16V) was used across Mazda's BF/BA platforms with transverse mounting. This engine received minor ECU and intake manifold revisions for different markets and trim levels, creating subtle power differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, near the gearbox flange. The code will read "B3" followed by additional characters indicating specific variants. The 16-valve head is visually distinct from the 8-valve B3 by its wider, more complex cam cover with "16 Valve" casting. Differentiate from the turbocharged B6T by the absence of a turbocharger and associated plumbing. Critical service parts, like the timing belt kit, are generally consistent across all B3 (16V) applications, but gaskets and sensors may vary by model year and market.
The B3 (16V)'s primary maintenance focus is the timing belt, with failure leading to engine stoppage. While non-interference, valve damage is possible. OEM service schedules are critical, as neglect is the leading cause of major issues. High-mileage units may develop cam seal leaks, making proactive replacement during belt changes advisable.
Analysis derived from Mazda technical bulletins (1989-1994) and workshop manuals. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MAZDA B3-16V.
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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