The Saab B230FIZI is a 2,290 cc, inline‑four turbocharged petrol engine produced between 1991 and 1993. It features a cast — iron block, aluminum cylinder head, and dual overhead camshafts (DOHC) with four valves per cylinder, delivering 147 kW (200 PS) and 300 Nm of torque. The low — pressure turbocharger and Saab's Trionic engine management system provide responsive power delivery with integrated ignition control.
Fitted exclusively to the Saab 9000 Aero, the B230FIZ…
Production years 1991–1993 meet Euro 1 standards for applicable markets for UK-spec models).
The Saab B230FIZI is a 2,290 cc inline‑four turbocharged petrol engine engineered for the Saab 9000 Aero (1991-1993). It combines a durable cast-iron block with a DOHC 16-valve head, low-pressure turbocharging, and the advanced Trionic T5.2 engine management system. Designed to meet Euro 1 standards, it delivers high performance with sophisticated electronic control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,290 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged (low-pressure) | |
Bore × stroke | 97.0 mm × 77.6 mm | |
Power output | 147 kW (200 PS) @ 5,500 rpm | |
Torque | 300 Nm @ 2,100 rpm | |
Fuel system | Bosch LH2.4 Jetronic with Trionic T5.2 ignition control | |
Emissions standard | Euro 1 | |
Compression ratio | 8.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Garrett T25 (low-pressure, non-intercooled) | |
Timing system | Chain-driven | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 175 kg |
The Saab B230FIZI was used exclusively in the Saab 9000 with longitudinal mounting. This engine was the high-performance variant for its brief production run, featuring the advanced Trionic T5.2 engine management system which integrated ignition control. All adaptations are documented in OEM technical bulletins.
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The B230FIZI's primary reliability consideration is the potential failure of the crankshaft position sensor, documented in Saab SIB SB-92-07. Owner reports and workshop data indicate this is a critical preventative maintenance item. Ensuring the Trionic system sensors are functioning correctly is also key to reliable operation.
Analysis derived from Saab technical bulletins (1991-1993) and owner club technical archives. 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 B230FIZI is a powerful and sophisticated engine for its time, but its main vulnerability is the crankshaft position sensor, which can fail without warning. Replacing this sensor preventatively with the revised unit is the single most important step for long-term reliability. With this fix and regular maintenance, it can be a very rewarding engine.
The most critical issue is crankshaft position sensor failure. Other common problems include faults in other Trionic system sensors, coolant leaks from the water pump or hoses, and failure of the APC solenoid. These are well-documented in Saab service literature and owner forums.
The B230FIZI engine was used exclusively in the high-performance Aero variant of the Saab 9000, produced from 1991 to 1993. It was a short-lived but significant engine, being one of the first Saab engines to feature the advanced Trionic engine management system.
Yes, but cautiously. The Trionic system can be remapped, and common upgrades include a manual boost controller, performance exhaust, and larger injectors. Significant power gains are possible, but the stock internals are generally reliable up to around 250 PS with supporting mods. Tuning should be done by specialists familiar with the Trionic system.
Fuel economy is moderate for a performance engine of its era. Expect around 11.5-13.5 L/100km (24-21 mpg UK) in combined driving for a Saab 9000 Aero. Highway cruising can yield better figures, around 9.0-10.0 L/100km (31-28 mpg UK), depending on driving style and condition.
Yes. The Saab B230FIZI is an interference engine. If the timing chain were to fail, the pistons and valves will collide, causing catastrophic internal damage. This makes regular inspection of the chain and tensioner (though generally robust) important.
It requires a good quality mineral or semi-synthetic oil with a viscosity of SAE 10W-40 or 15W-40. Saab specifically advised against using modern low-viscosity oils (like 5W-30) in these older turbocharged engines. Always follow the recommendations in the owner's manual.
Comprehensive technical documentation and regulatory references
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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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