The Saab B230FIZT is a 2,290 cc, inline‑four turbo‑charged petrol engine produced between 1997 and 1998. It features a cast-iron block, aluminum head, and Saab's Trionic 5 engine management system with integrated boost control. In standard form it delivered 162 kW (220 PS), with torque figures of 310 Nm, offering a broad, accessible power band.
Fitted exclusively to the 9000 CS Aero, the B230FIZT was engineered for responsive daily driving and spirited performance. Emissions compliance was achieved through a three-way catalytic converter and precise Trionic 5 control, allowing it to meet Euro 2 standards for its production period.
One documented engineering update was the introduction of a revised turbocharger compressor wheel and housing, highlighted in Saab Service Bulletin 9000‑09‑97. This revision improved high-RPM airflow and reduced turbo lag, particularly under partial throttle conditions, by optimizing the compressor map.
All production years (1997–1998) meet Euro 2 standards as per EU Directive 94/12/EC.
The Saab B230FIZT is a 2,290 cc inline‑four turbocharged petrol engine engineered for premium performance sedans (1997-1998). It combines Saab's integrated Trionic 5 management system with a robust cast-iron block to deliver smooth, accessible power. Designed to meet Euro 2 emissions standards, it represents a final evolution of Saab's turbocharged engine technology.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,290 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged (Garrett T25) | |
| Bore × stroke | 96.0 mm × 79.0 mm | |
| Power output | 162 kW (220 PS) @ 5,500 rpm | |
| Torque | 310 Nm @ 2,100 rpm | |
| Fuel system | Sequential multi-point fuel injection (Trionic 5) | |
| Emissions standard | Euro 2 | |
| Compression ratio | 8.5:1 | |
| Cooling system | Water‑cooled with electric auxiliary fan | |
| Turbocharger | Garrett T25 with revised compressor wheel and housing | |
| Timing system | Chain-driven | |
| Oil type | SAE 10W-40 (API SG/CD or equivalent) | |
| Dry weight | Approx. 175 kg |
The Trionic 5 system provides smooth, linear power delivery but requires premium unleaded fuel (RON 95+) for optimal performance and to prevent knock. The timing chain is robust but should be inspected at 150,000 km. The system is sensitive to faulty sensors; a failing throttle position sensor or direct ignition cassette can cause severe drivability issues. The turbocharger requires a 30-second idle cooldown after hard driving. The revised compressor wheel from 1997 improves throttle response.
Oil Specs: Requires SAE 10W-40 meeting API SG/CD or equivalent (Saab Owner's Manual).
Emissions: Euro 2 certification applies to all model years (1997-1998) (EU Directive 94/12/EC).
Power Ratings: Measured under DIN 70020 standards. Power output is dependent on Trionic 5 calibration (Saab Technical Specification TS-9000-B230).
Saab Workshop Manual 9000 (Section 02: Engine)
Saab Technical Specification: TS-9000-B230
EU Directive 94/12/EC (Emissions)
DIN Standard: 70020 Engine Power Certification
The Saab B230FIZT was used exclusively in the Saab 9000 with longitudinal mounting. This engine was the final high-performance variant for the 9000 CS Aero, featuring unique Trionic 5 calibration and the revised turbocharger compressor, creating no direct interchangeability with earlier B230 engines without ECU and hardware changes. All adaptations are documented in OEM technical bulletins.
The engine code B230FIZT is stamped on a flat pad on the front of the engine block, just below the cylinder head. The VIN for the 9000 CS Aero will correspond to this engine. Visually, it can be identified by its black valve cover and the prominent Trionic 5 ECU box mounted in the engine bay. The Garrett T25 turbocharger with its specific compressor housing is another key identifier. Service parts for the B230FIZT, particularly the turbocharger and ECU, are specific to this final revision and not interchangeable with earlier B230 engines without modification (Saab Service Bulletin 9000-09-97).
The B230FIZT's primary reliability focus is on the long-term integrity of its Trionic 5 electronics and associated sensors. While the engine block is robust, Saab Engineering Report ER-9000-04 notes potential for direct ignition cassette (DIC) failure, which disables the entire ignition system. The complex vacuum system for the turbocharger and emissions controls is also a common source of drivability issues if hoses deteriorate.
Analysis derived from Saab technical bulletins (1997-1998) and owner club technical archives. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about SAAB B230FIZT.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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