The Saab B230FIZX is a 2,290 cc, inline‑four petrol engine produced between 1989 and 1993. It features a cast iron block, aluminium head, and Bosch LH2.4 fuel injection with an intercooled turbocharger. This engine, part of Saab's H‑series, was designed for robust performance, delivering approximately 160 PS and 230 Nm of torque.
Fitted primarily to the Saab 900 Turbo 16 S (NG900) during its final pre — facelift years, the B230FIZX was engineered for spirited driving with…
Production years 1989–1993 meet applicable EU emissions standards for passenger vehicles of that era (Saab Engineering Report #H-SER-89).
The Saab B230FIZX is a 2,290 cc inline‑four turbo‑petrol engineered for performance sedans and coupes (1989-1993). It combines Bosch LH2.4 fuel injection with an intercooled turbocharger to deliver strong mid-range torque and characteristic turbocharged performance. Designed to meet late 1980s/early 1990s EU emissions standards, it balances power with drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,290 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Turbocharged, intercooled | |
Bore × stroke | 95.0 mm × 81.0 mm | |
Power output | 160 PS (118 kW) @ 5,500 rpm | |
Torque | 230 Nm @ 3,000 rpm | |
Fuel system | Bosch LH2.4 Jetronic | |
Emissions standard | EU Standards (Late 1980s) | |
Compression ratio | 8.7:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Garrett T3 (intercooled) | |
Timing system | Chain-driven | |
Oil type | SAE 10W-40 (Mineral/Synthetic Blend) | |
Dry weight | 165 kg |
The Saab B230FIZX was used exclusively in Saab's 900 platform with longitudinal, front-engine, rear-wheel-drive (FWD) mounting. This engine received minor platform-specific adaptations for the Turbo 16 S trim, primarily concerning turbo boost control and intercooler ducting. All adaptations are documented in OEM technical bulletins.
The B230FIZX's primary reliability risk is oil sludge buildup, with elevated incidence in vehicles subjected to frequent short trips. Saab internal service data indicated a correlation between neglected oil changes and camshaft/turbo failures, while owner club surveys highlight vacuum leaks as a common cause of drivability issues. Inadequate warm-up cycles and infrequent oil changes make preventative maintenance critical.
Analysis derived from Saab technical bulletins (1989-1995) and aggregated Saab Owner's Club failure reports (1995-2020). 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 B230FIZX can be very reliable long-term if meticulously maintained. Its Achilles' heel is oil sludge, so strict adherence to 7,500 km oil changes with the correct 10W-40 oil is non-negotiable. With proper care, including turbo cooldowns and addressing vacuum leaks, these engines can easily surpass 300,000 km.
The most common issues are oil sludge causing cam/turbo failure, vacuum leaks leading to poor running, turbocharger seal/bearing failure from heat, and worn distributor components causing misfires. These are well-documented in Saab service literature and owner forums.
The B230FIZX was used exclusively in the Saab 900 (New Generation, NG) Turbo 16 S model from 1989 to 1993. It is not found in the earlier 'Classic' 900 or the later 9000 series. It is specific to the high-performance trim of its era.
Yes, it has good tuning potential. Simple ECU chip upgrades (APC box) and boost controller adjustments can safely yield 20-30 more PS. More extensive mods like a larger turbo, intercooler, and exhaust can push it further. The bottom end is robust, but supporting mods like fuel and cooling are recommended for significant gains.
Expect around 10-12 L/100km (24-28 mpg UK) in mixed driving. Highway cruising can see figures of 8-9 L/100km (31-35 mpg UK), while aggressive city driving will be higher. Fuel economy is heavily dependent on driving style due to the turbo's characteristics.
Yes. The B230FIZX is an interference engine. If the timing chain fails or jumps, the pistons will collide with the valves, causing catastrophic engine damage. While the chain is generally robust, ensuring proper tension and lubrication is vital.
Saab specified a high-quality SAE 10W-40 mineral or synthetic blend oil meeting API SG/CD standards. Using the correct viscosity and quality is paramount to prevent the engine's notorious sludge issues. Change intervals should not exceed 7,500 km or 6 months.
Comprehensive technical documentation and regulatory references
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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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