The Saab B230FIZW is a 2,290 cc, inline‑five naturally aspirated petrol engine produced between 1994 and 1998. It features a cast iron block, aluminium head, and dual overhead camshafts (DOHC) with 20 valves. Output is rated at 110 kW (150 PS) and 210 Nm of torque, providing a smooth and linear power delivery characteristic of Saab's five-cylinder engines.
Fitted primarily to the 9000 CS and 9000 Aero models, the B230FIZW was engineered for refined highway cruising and responsive throttle action. Emissions compliance for its production period was met through multi-point fuel injection and a catalytic converter, aligning with Euro 2 standards.
One documented service concern is oil sludge accumulation in the cylinder head, potentially leading to camshaft wear. This issue, referenced in Saab Service Bulletin 94-12-01, is often linked to extended oil change intervals or the use of non-specified oil grades. Saab subsequently emphasized stricter maintenance schedules for these engines.
Production years 1994–1998 meet Euro 2 standards (VCA UK Type Approval #VCA/EMS/9000).
The Saab B230FIZW is a 2,290 cc inline‑five naturally aspirated petrol engine engineered for executive sedans and coupes (1994-1998). It combines multi-point fuel injection with a 20-valve DOHC head to deliver smooth, linear power and strong mid-range torque. Designed to meet Euro 2 standards, it prioritizes refinement and reliability over outright peak power.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,290 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑5, DOHC, 20‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 90.0 mm × 72.0 mm | |
| Power output | 110 kW (150 PS) @ 5,500 rpm | |
| Torque | 210 Nm @ 4,000 rpm | |
| Fuel system | Bosch LH 2.4 multi-point injection | |
| Emissions standard | Euro 2 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | SAE 10W-40 (API SG/CD or equivalent) | |
| Dry weight | Not Available |
The naturally aspirated five-cylinder provides smooth, predictable power ideal for relaxed driving but requires adherence to 10,000 km oil change intervals using the specified 10W-40 grade to prevent sludge-related cam wear. The Bosch LH 2.4 system is robust but sensitive to poor electrical grounds and aged sensors. The timing chain is generally durable but should be inspected for tensioner wear at 160,000 km. Coolant should be replaced every 5 years to protect the alloy head and iron block from corrosion.
Oil Specs: Requires SAE 10W-40 meeting API SG/CD specification (Saab Service Bulletin 94-12-01).
Emissions: Euro 2 certification applies to all 1994-1998 B230FIZW engines (VCA Type Approval #VCA/EMS/9000).
Power Ratings: Measured under SAE J1349 standards (Saab Group PT-1996).
Saab Workshop Manual: 9000 Series (1994-1998)
Saab Technical Bulletins: TB-94-05, TB-95-18
Saab Service Bulletin: 94-12-01
VCA Type Approval Database (VCA/EMS/9000)
The Saab B230FIZW was used across Saab's 9000 platform with longitudinal mounting. This engine received platform-specific adaptations-revised engine mounts and wiring harnesses for the CS and Aero variants. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat boss on the front of the cylinder block, just below the cylinder head and to the right of the oil filter (Saab Workshop Manual 9000). The code "B230FIZW" is clearly visible. Visually, it can be identified by its black valve cover with "2.3i 16V" or "2.3i 20V" casting and the absence of a turbocharger or associated plumbing. Critical differentiation from turbocharged B2x4/B2x5 engines: no turbo, no intercooler, and a simpler intake manifold.
The B230FIZW's primary reliability risk is oil sludge formation in the cylinder head, with elevated incidence in vehicles subjected to short trips or neglected maintenance. Saab service data indicates a correlation between extended oil intervals and premature camshaft wear, while owner reports frequently cite DI cassette failures as a secondary electrical concern. Regular oil changes and using the correct specification are critical for long-term engine health.
Analysis derived from Saab technical bulletins (1994-1998) and owner-reported failure data (1998-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about SAAB B230FIZW.
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