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 res…
Production years 1994–1998 meet Euro 2 standards .
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 | Refer to vehicle handbook / manufacturer specification | |
Dry weight | Not Available |
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.
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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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The B230FIZW is fundamentally robust, with its cast iron block and chain-driven timing. Its main Achilles' heel is oil sludge, which can cause severe damage if maintenance is neglected. With strict adherence to oil change intervals using the correct 10W-40 oil, these engines can easily surpass 300,000 km. The DI cassette is a known wear item but is straightforward to replace.
The most common issues are oil sludge leading to cam wear (addressed in Saab SB 94-12-01), failure of the DI ignition cassette, coolant leaks from the plastic thermostat housing, and vacuum leaks from aged hoses. These are well-documented in Saab service literature and owner communities.
The B230FIZW was used exclusively in the Saab 9000 series from 1994 to 1998. It powered the naturally aspirated 2.3i variants of both the 9000 CS (sedan and hatchback) and the 9000 Aero (hatchback only, until 1997). It was not used in the 900 or 9-3 models.
Yes, but gains are modest due to its naturally aspirated design. Common modifications include a performance exhaust, cold air intake, and ECU remap, which might yield 10-15 kW. More significant power increases require forced induction (turbo/supercharger), which is complex and costly, involving engine management and fuel system upgrades.
Fuel economy is moderate for its size and era. Expect around 11-13 L/100km (22-26 mpg UK) in city driving and 7-8 L/100km (35-40 mpg UK) on the highway. Combined figures typically range from 9-10 L/100km (28-31 mpg UK), heavily dependent on driving style and vehicle condition.
Yes. The B230FIZW is an interference engine. If the timing chain were to fail or jump significantly, the pistons would collide with the open valves, causing catastrophic internal damage. Fortunately, the chain is very durable and rarely fails if basic maintenance is performed.
Saab specifies SAE 10W-40 engine oil meeting API SG/CD (or equivalent) standards. Using a high-quality mineral or semi-synthetic oil of this grade is crucial for preventing sludge. Full synthetic 10W-40 can also be used and may offer better protection. Change intervals should not exceed 10,000 km or 12 months.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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.
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