The Fiat 955 B2.000 is a 1,998 cc, inline‑four petrol engine produced between 1996 and 1999. It features a twin‑cam (DOHC) design with four valves per cylinder and multi‑point fuel injection. This naturally aspirated unit delivered approximately 114 kW (155 PS) and 186 Nm of torque, providing strong performance for its class.
Fitted primarily to the Fiat Coupé and Fiat Marea models, the 955 B2.000 was engineered for spirited, sporty driving with an emphasis on high-RPM power delivery. Emissions compliance for its production period was managed through its electronic fuel injection system and catalytic converter, meeting prevailing EU standards.
One documented service consideration involves the hydraulic timing belt tensioner, which can develop internal leaks leading to belt slippage or failure. This is noted in Fiat service documentation, where extended intervals or incorrect tensioner installation can precipitate premature wear. Replacement with the updated tensioner design is recommended during belt service.
Production years 1996–1999 meet applicable EU emissions standards for that period (VCA UK Type Approval documentation).
The Fiat 955 B2.000 is a 1,998 cc inline‑four petrol engine engineered for sporty compact models (1996-1999). It combines multi‑point fuel injection with a dual overhead camshaft to deliver high-revving performance and a broad power band. Designed to meet the emissions regulations of its time, it prioritizes driver engagement and top-end power.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 86.0 mm × 86.0 mm | |
| Power output | 114 kW (155 PS) @ 6,500 rpm | |
| Torque | 186 Nm @ 4,200 rpm | |
| Fuel system | Multi-point fuel injection (Magneti Marelli IAW) | |
| Emissions standard | EU Standards (Pre-Euro 2 / Early Euro 2) | |
| Compression ratio | 10.3:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven camshafts (hydraulic tensioner) | |
| Oil type | SAE 10W-40 (ACEA A3/B3) | |
| Dry weight | 138 kg |
The DOHC 16-valve design offers high-RPM power but requires strict adherence to the 60,000 km timing belt replacement interval. The hydraulic tensioner is a critical wear item; failure can cause catastrophic belt slippage. Using the specified 10W-40 oil is essential for valve train and tensioner longevity. The Magneti Marelli IAW system is generally reliable but sensitive to fuel quality and electrical integrity.
Oil Specs: Requires SAE 10W-40 meeting ACEA A3/B3 specification (Fiat Owner's Manual 1997).
Emissions: Meets EU emissions standards applicable to vehicles registered between 1996-1999 (VCA Type Approval Archive).
Power Ratings: Measured under manufacturer's internal dynamometer standards (Fiat Group PT-1998).
Fiat Technical Information System: Manual 955/B2, SIB 0955/96
Fiat Group Powertrain Specifications 1998 (PT-1998)
The Fiat 955 B2.000 was used across Fiat's Coupé and Marea platforms with transverse mounting. This engine received minor ECU updates during its production run but no major mechanical revisions that affect core compatibility. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat pad on the front face of the cylinder block, near the gearbox flange (Fiat TIS 955-01). The code "955 B2.000" should be clearly visible. Visually, it can be identified by its red cam cover and twin-cam layout. Differentiation from the 2.0L 140 PS (939A/B) is by power output and ECU mapping; differentiation from the 2.0L 8-valve (837A) is by the DOHC head and red cam cover.
The 955 B2.000's primary reliability risk is timing belt tensioner failure, with elevated incidence in high-mileage or poorly maintained vehicles. Fiat service data indicates tensioner failure is a leading cause of catastrophic engine damage. Extended service intervals or use of non-OEM parts make preventative replacement with the updated tensioner critical.
Analysis derived from Fiat technical bulletins (1996-1999) and general industry repair data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FIAT 955-B2-000.
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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