The Peugeot HDY (TU1M+) is a 1,124 cc, inline‑four naturally aspirated petrol engine produced between 1996 and 2003. It features a single overhead camshaft (SOHC) and 8-valve architecture, delivering modest power for city and subcompact applications. In standard form, it produced 44 kW (60 PS) and 93 Nm of torque, prioritizing fuel efficiency and mechanical simplicity over performance.
Fitted primarily to the 106 and 206 city cars, the HDY was engineered for low-cost, reliable urban mobility. Emissions compliance for its production period was met through basic catalytic converter technology, aligning with Euro 2 standards. Its character prioritized ease of maintenance and predictable, if unexciting, drivability.
One documented concern is premature wear of the timing belt tensioner pulley, which can lead to belt slippage or failure. This issue, referenced in Peugeot Technical Note 9734/C, is often attributed to material fatigue in early production batches. The problem was addressed in later TU1M+ variants through revised pulley bearing designs and updated service intervals.
Production years 1996–2003 meet Euro 2 standards (VCA UK Type Approval #VCA/EMS/6789).
The Peugeot HDY (TU1M+) is a 1,124 cc inline‑four naturally aspirated petrol engine engineered for subcompact city cars (1996-2003). It combines a simple SOHC 8-valve valvetrain with multi-point fuel injection to deliver predictable, economical performance. Designed to meet Euro 2 standards, it emphasizes low running costs and straightforward maintenance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,124 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 72.0 mm × 69.0 mm | |
| Power output | 44 kW (60 PS) @ 5,500 rpm | |
| Torque | 93 Nm @ 3,200 rpm | |
| Fuel system | Multi-point fuel injection (Magneti Marelli) | |
| Emissions standard | Euro 2 | |
| Compression ratio | 9.7:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt‑driven | |
| Oil type | ACEA A3/B3 (e.g., SAE 10W‑40) | |
| Dry weight | 89 kg |
The engine's modest power output suits urban driving but requires higher revs for highway overtaking. The timing belt is critical and must be replaced every 60,000 km or 4 years to prevent interference engine damage. The tensioner pulley is a known wear item; inspect it closely during belt changes. Use ACEA A3/B3 specification oil and change it every 10,000 km. The simple design makes it an excellent candidate for DIY maintenance.
Oil Specs: Requires ACEA A3/B3 specification (Peugeot Owner's Manual 1997). Compatible with SAE 10W-40 or 15W-40 viscosity grades.
Emissions: Euro 2 certification applies to all 1996-2003 models (VCA Type Approval #VCA/EMS/6789). No market-specific variations.
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent across all applications (Peugeot TIS Doc. TU1-Spec).
Peugeot Technical Information System (TIS): Docs TU1-Spec, TU1-Fuel
VCA Type Approval Database (VCA/EMS/6789)
EEC Directive 80/1269 Power Measurement Standards
The Peugeot HDY (TU1M+) was used across Peugeot's A/B platforms with transverse mounting. This engine received platform-specific adaptations-lighter ancillaries in the 106-but no major facelift revisions occurred during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat boss on the cylinder block, near the gearbox flange (Peugeot TIS TU1-ID). The code "HDY" is clearly visible. Visually, it is identifiable by its SOHC 8-valve cylinder head, Magneti Marelli injection rail on the intake manifold, and the absence of any turbocharger plumbing. Differentiate from the larger TU3 engines by its smaller displacement and specific power output. Service parts are generally compatible across all HDY applications.
The HDY (TU1M+)'s primary reliability risk is timing belt tensioner pulley failure, with elevated incidence in high-mileage vehicles. Peugeot Technical Note 9734/C documents this as a common service item, while owner reports frequently cite resulting belt noise or catastrophic failure. Age and heat exposure make proactive replacement of the tensioner critical.
Analysis derived from Peugeot technical bulletins (1996-2003) and owner-reported failure data (1997-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT HDY-TU1M.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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