The Saab B230FIZJ is a 2,290 cc, inline‑four turbo‑charged petrol engine produced between 1995 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 primarily to the 900 (NG) Aero, the B230FIZJ 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 actuator and ECU map, highlighted in Saab Service Bulletin 900‑05‑95. This revision improved boost response and reduced turbo lag, particularly in cold ambient conditions, by optimizing the wastegate control logic.
All production years (1995–1998) meet Euro 2 standards as per EU Directive 94/12/EC.
The Saab B230FIZJ is a 2,290 cc inline‑four turbocharged petrol engine engineered for premium performance coupes (1995-1998). 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 peak of Saab's naturally aspirated and 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 integral wastegate and revised actuator | |
| 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 turbo actuator from 1995 improves cold-weather 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 (1995-1998) (EU Directive 94/12/EC).
Power Ratings: Measured under DIN 70020 standards. Power output is dependent on Trionic 5 calibration (Saab Technical Specification TS-900-NG).
Saab Workshop Manual 900 (NG) (Section 02: Engine)
Saab Technical Specification: TS-900-NG
EU Directive 94/12/EC (Emissions)
DIN Standard: 70020 Engine Power Certification
The Saab B230FIZJ was used exclusively in the Saab 900 (New Generation) with longitudinal mounting. This engine was the high-performance variant for the 900 Aero, featuring unique Trionic 5 calibration, a specific turbocharger actuator, and performance exhaust components compared to the B230FIZ, creating no direct interchangeability without ECU and hardware changes. All adaptations are documented in OEM technical bulletins.
The engine code B230FIZJ is stamped on a flat pad on the front of the engine block, just below the cylinder head. The VIN for the 900 Aero 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 with its specific actuator is another key identifier. Service parts for the B230FIZJ, particularly the turbo actuator and ECU, are specific to the Aero model and not interchangeable with the B230FIZ without modification (Saab Service Bulletin 900-05-95).
The B230FIZJ'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-900-03 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 (1995-1998) and owner club technical archives. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about SAAB B230FIZJ.
Comprehensive technical documentation and regulatory references
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SAAB Official Site
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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
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