The Saab B230FIZ is a 2,290 cc, inline‑four turbo‑charged petrol engine produced between 1994 and 1998. It features a cast-iron block, aluminum head, and Saab's Trionic 5 engine management system, which integrated ignition, fuel injection, and boost control. In standard form it delivered 147 kW (200 PS), with torque figures of 285 Nm, offering a broad, accessible power band.
Fitted to models such as the 9000 CS and 900 (NG), the B230FIZ was engineered for responsive daily driving and relaxed highway cruising. 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 transition from the earlier B230F to the B230FIZ specification, highlighted in Saab Service Bulletin 9000‑07‑94. This revision included a revised cylinder head with improved coolant passages and an updated Trionic 5 ECU map to enhance low-end torque and emissions stability.
All production years (1994–1998) meet Euro 2 standards as per EU Directive 94/12/EC.
The Saab B230FIZ is a 2,290 cc inline‑four turbocharged petrol engine engineered for executive sedans and coupes (1994-1998). 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 refinement 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 | 147 kW (200 PS) @ 5,500 rpm | |
| Torque | 285 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 integral wastegate | |
| 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 cylinder head from 1994 improves thermal management over the B230F.
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 (1994-1998) (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 B230FIZ was used in the Saab 9000 and 900 (New Generation) with longitudinal mounting. This engine was the mid-range turbocharged variant, featuring the Trionic 5 management system and specific cylinder head revisions compared to the base B230F, creating interchangeability limits without ECU and hardware changes. All adaptations are documented in OEM technical bulletins.
The engine code B230FIZ is stamped on a flat pad on the front of the engine block, just below the cylinder head. The VIN for applicable 9000 and 900 models will correspond to this engine. Visually, it can be identified by its black valve cover (on most units) and the prominent Trionic 5 ECU box mounted in the engine bay. The Garrett T25 turbocharger is another key identifier. Service parts for the B230FIZ, particularly the cylinder head and ECU, are specific to this revision and not fully interchangeable with the earlier B230F without modification (Saab Service Bulletin 9000-07-94).
The B230FIZ'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-9000-02 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 (1994-1998) and owner club technical archives. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about SAAB B230FIZ.
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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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