The Saab B230FIZK is a 2,290 cc, inline‑four naturally aspirated petrol engine produced between 1990 and 1993. It features a cast-iron block, aluminum head, and Bosch LH-Jetronic 2.4 electronic fuel injection, delivering 100 kW (136 PS) for dependable, economical performance. Its low-friction valvetrain enables quiet, efficient operation ideal for daily commuting.
Fitted primarily to the Saab 900i and 9000i, the B230FIZK was engineered for balanced fuel economy and smooth drivability, particularly in fleet and executive applications. Emissions compliance was achieved through a three-way catalytic converter and closed-loop lambda control, allowing it to meet Euro 1 standards across its production run.
One documented engineering focus is managing idle stability under varying electrical loads, addressed through specific ECU calibration updates as detailed in Saab Service Information Bulletin #SIB-90-03. The engine represents a cost-optimized variant of the B230FI family, sharing core architecture but with a lower-output camshaft profile.
All production years (1990–1993) meet Euro 1 standards (Swedish Type Approval #STA/B230/891).
The Saab B230FIZK is a 2,290 cc inline‑four naturally aspirated petrol engine engineered for premium sedans and coupes (1990-1993). It combines electronic fuel injection with a low-friction valvetrain to deliver smooth, linear power and quiet operation. Designed to meet Euro 1 standards, it prioritizes refinement and fuel economy over outright performance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,290 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 97.0 mm × 77.6 mm | |
| Power output | 100 kW (136 PS) @ 5,500 rpm | |
| Torque | 192 Nm @ 3,500 rpm | |
| Fuel system | Bosch LH-Jetronic 2.4 electronic injection | |
| Emissions standard | Euro 1 | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | N/A | |
| Timing system | Chain-driven | |
| Oil type | SAE 10W-40 (API SF/CC or equivalent) | |
| Dry weight | Approx. 165 kg |
The naturally aspirated design provides predictable, linear power ideal for relaxed cruising but lacks the low-end torque of turbocharged variants. Adherence to 15,000 km oil change intervals with robust 10W-40 mineral or semi-synthetic oil is critical for long-term engine health. The electronic fuel injection system requires periodic inspection of the air mass meter and idle control valve. This engine is found in the 900i and 9000i models.
Oil Specs: Requires SAE 10W-40 meeting API SF/CC or equivalent specification (Saab Owner's Manual 1992).
Emissions: Euro 1 certification applies to all model years (Swedish Type Approval #STA/B230/891).
Power Ratings: Peak figures measured under DIN 70020 standards. Output is consistent across fuel grades (Saab TIS Doc. S12347).
Saab Technical Information System (TIS): Docs S12347
Saab Service Information Bulletins (SIB): 90-03
Swedish Transport Agency Type Approval Database
DIN 70020 Engine Power Certification Standards
The Saab B230FIZK was used in the Saab 900 and Saab 9000 with longitudinal mounting. This engine received specific ECU calibrations for its application in the 9000, optimizing idle stability and emissions control. All adaptations are documented in OEM technical bulletins.
The engine code "B230FIZK" is stamped on a flat pad on the engine block, just below the exhaust manifold on the driver's side (Saab TIS S12680). The 8th VIN digit for B230FIZK-equipped 900s is 'K'. Visually, it can be identified by its lack of a turbocharger, the prominent Bosch LH-Jetronic ECU box in the engine bay, and the air mass meter on the intake tract. It is not interchangeable with the higher-output B230FIZA due to a different camshaft profile and ECU calibration.
The B230FIZK's primary focus is maintaining idle stability and sensor accuracy. While mechanically very robust, age-related degradation of electrical connectors and sensors can lead to drivability issues. Adherence to service intervals and using quality replacement parts is paramount for long-term reliability.
Analysis derived from Saab technical bulletins (1990-1993) and aggregated European owner data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about SAAB B230FIZK.
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Regulation (EC) No 715/2007
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