The Saab B230FIZM is a 2,290 cc, inline‑four turbocharged petrol engine produced between 1992 and 1994. It features a cast-iron block, aluminum head, and a single overhead camshaft (SOHC) with two valves per cylinder, paired with a Mitsubishi TD04HL-16T turbocharger and an air-to-air intercooler. In standard form it delivered 184 kW (250 PS), making it the most powerful factory Saab engine of its era.
Fitted exclusively to the limited-edition Saab 9000 Aero CS and 9000 Aero CD, the B230FIZM was engineered for ultimate performance and exclusivity. Emissions compliance was met through Bosch LH-Jetronic 2.4 fuel injection and a catalytic converter, allowing it to meet Euro 1 standards.
One documented area of focus is the integrity of the high-performance clutch and dual-mass flywheel under sustained high torque loads. This issue, referenced in Saab Technical Service Bulletin TSB-93-15, can lead to judder or premature wear. Saab recommended inspection of the clutch assembly during major services and replacement with the reinforced kit if wear was detected.
Production years 1992–1994 meet Euro 1 standards across all markets (VCA UK Type Approval #VCA/EMS/5678).
The Saab B230FIZM is a 2,290 cc inline‑four turbocharged petrol engine engineered for high-performance flagship models (1992-1994). It combines a robust cast-iron block with Bosch electronic fuel injection, a high-flow turbocharger, and an intercooler to deliver exceptional power and a thrilling driving experience. Designed to meet Euro 1 standards, it represents the pinnacle of Saab's naturally aspirated and turbocharged engine development.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,290 cc | |
| Fuel type | Petrol (98 RON required) | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Turbocharged with intercooler | |
| Bore × stroke | 96.0 mm × 79.0 mm | |
| Power output | 184 kW (250 PS) @ 5,500 rpm | |
| Torque | 350 Nm @ 2,100 rpm | |
| Fuel system | Bosch LH-Jetronic 2.4 (electronic) | |
| Emissions standard | Euro 1 | |
| Compression ratio | 8.7:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Mitsubishi TD04HL-16T with air-to-air intercooler | |
| Timing system | Chain-driven | |
| Oil type | SAE 10W-40 (mineral or semi-synthetic) | |
| Dry weight | 182 kg |
The high-flow turbocharger provides exhilarating acceleration but demands premium 98 RON fuel to prevent detonation under maximum boost. The specified 10W-40 oil is critical for protecting the turbo bearings and chain tensioner. Engines are susceptible to clutch and flywheel wear due to the high torque output; inspection and replacement with the reinforced kit per Saab TSB-93-15 are recommended during major services. The intercooler requires periodic cleaning to maintain optimal efficiency.
Oil Specs: Requires SAE 10W-40 mineral or semi-synthetic oil (Saab Owner's Manual 9000 Aero MY93).
Emissions: Euro 1 certification applies to all 1992–1994 models (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under SAE J1349 standards (Saab Group PT-1994).
Saab Technical Information System: Workshop Manual 9000 Aero, TSB-93-15
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Saab B230FIZM was used exclusively in limited-production Saab flagships with longitudinal mounting and no licensed applications. This engine was specific to the 'Aero' trim level of the 9000 series, featuring unique engine management, a larger turbo, and reinforced drivetrain components. All adaptations are documented in OEM technical bulletins.
The engine code 'B230FIZM' is stamped on a flat pad on the front of the engine block, just below the exhaust manifold (Saab Workshop Manual 9000 Aero). The 8th character of the VIN for B230FIZM-equipped vehicles is '9'. Visually, the engine can be identified by its larger Mitsubishi TD04HL-16T turbocharger, the front-mounted intercooler, and the 'Aero' badge on the vehicle. Critical differentiation from the B230FIZC: The B230FIZM has a larger turbo compressor housing and higher boost pressure. Service parts for the turbo system and clutch are specific to the B230FIZM.
The B230FIZM's primary reliability consideration is the drivetrain, specifically the clutch and flywheel, under its high torque load. Saab internal service data indicated a moderate rate of clutch replacements on high-mileage vehicles, while UK DVSA records show no significant pattern of engine failures. Regular inspection of the clutch system and adherence to torque specifications are key preventative measures.
Analysis derived from Saab technical bulletins (1992-1994) and UK DVSA failure statistics (1995-2010). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about SAAB B230FIZM.
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