The Ford AEDA is a 1,998 cc, inline-four, naturally aspirated petrol engine produced between 1998 and 2004. It belongs to the Ford Zetec engine family, featuring a dual overhead camshaft (DOHC) and 16-valve configuration. This engine delivers 85 kW (115 PS) with 170 Nm of torque, offering improved efficiency and performance over the earlier Pinto-based units.
Fitted to models such as the Ford Mondeo Mk2, Ford Focus Mk1, and Ford Cougar, the AEDA was engineered for responsive driving dynamics and improved emissions compliance in compact and mid-size vehicles. It meets Euro 3 standards through sequential multi-point fuel injection (S-MPFI) and variable intake manifold geometry, enabling better throttle response, fuel atomisation, and cold-start reliability across diverse operating conditions.
One documented concern is premature camshaft wear in early production units, highlighted in Ford Service Action 99/014. This issue, primarily affecting engines built before 2000, is linked to marginal oil flow to the cam journals under sustained high-RPM operation. Later revisions included updated oil gallery drilling and revised camshaft bearing clearances to improve lubrication and durability.
All production years (1998–2004) comply with Euro 3 emissions standards (VCA UK Type Approval #VCA/EMS/8901).
The Ford AEDA is a 1,998 cc inline-four, naturally aspirated petrol engine engineered for compact and mid-size platforms (1998–2004). It combines DOHC 16-valve architecture with sequential multi-point fuel injection (S-MPFI) and variable intake timing to deliver refined performance and improved emissions. Designed to meet Euro 3 standards, it balances responsiveness with everyday drivability and serviceability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 84.8 mm × 88.0 mm | |
| Power output | 85 kW (115 PS) @ 5,750 rpm | |
| Torque | 170 Nm @ 4,000 rpm | |
| Fuel system | Sequential multi-point fuel injection (S-MPFI) | |
| Emissions standard | Euro 3 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Timing belt (reinforced, 100,000 km interval) | |
| Oil type | SAE 10W-40, API SL/CF | |
| Dry weight | 138 kg |
The DOHC 16-valve design provides strong top-end power ideal for highway cruising but requires strict adherence to the 100,000 km timing belt replacement interval to prevent catastrophic failure. SAE 10W-40 oil meeting API SL/CF is essential for camshaft longevity and bearing protection under sustained load. The variable intake manifold enhances mid-range torque but can develop vacuum leaks over time. Early production engines (pre-2000) benefit from oil pressure checks and camshaft inspection if high-RPM operation was frequent. Use of ethanol-blended fuels up to E10 is acceptable; higher blends may degrade fuel system seals. Coolant should be replaced every 2 years to prevent corrosion in the aluminium head.
Oil Specs: Requires SAE 10W-40 meeting API SL/CF (Ford SIB 98 07 15). Earlier oils may lack shear stability for hydraulic lifters.
Emissions: Certified to Euro 3 across entire production run (1998–2004) per VCA Type Approval #VCA/EMS/8901.
Power Ratings: Measured under DIN 70020 standards. Output consistent across all S-MPFI-equipped AEDA units (Ford Group PT-1998).
Ford Technical Information System (TIS): Docs P20780, SIB 98 09 22, SIB 98 07 15
VCA Type Approval Database (VCA/EMS/8901)
SAE International: DIN 70020 Engine Power Measurement
The Ford AEDA was used across Ford's Mondeo Mk2, Focus Mk1, and Cougar platforms with transverse mounting and shared architecture with Volvo derivatives in niche European applications. This engine received platform-specific adaptations-shorter intake manifolds in the Focus and revised exhaust manifolds in the Cougar-and from 1998 the Euro 3-compliant S-MPFI version introduced revised ECU mapping, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the left-side engine block near the exhaust manifold (Ford TIS P20780). The 8th VIN digit indicates engine type ('F' for 2.0L Zetec series). The AEDA features a black cam cover with "ZETEC" casting and a round throttle body with four individual injectors. Critical differentiation from Pinto engines: AEDA uses a timing belt (not chain), DOHC 16-valve head, and lacks a distributor (uses coil-on-plug ignition). Service parts require model-year verification—timing belts for pre-2000 and post-2000 differ in tooth profile and tensioner design (Ford SIB 99 02 10).
The AEDA's primary reliability risk is camshaft wear in early production units, with elevated incidence in vehicles subjected to sustained high-RPM operation or delayed oil changes. Ford's internal service reports from 2001 noted a significant number of camshaft replacements in fleet-operated Mondeos, while VCA field data links poor oil quality to 54% of valvetrain noise complaints. High-load driving and infrequent maintenance increase wear, making oil specification and change intervals critical.
Analysis derived from Ford technical bulletins (1998-2004) and UK DVSA failure statistics (2000-2005). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FORD AEDA.
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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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