The Peugeot CDY (TU9M) is a 1,360 cc, inline‑four naturally aspirated petrol engine produced between 1996 and 2003. It features an aluminum alloy block and head, single overhead camshaft (SOHC), and two valves per cylinder. In standard form, it delivered 55 kW (75 PS) and 110 Nm of torque, engineered for economical urban mobility and low running costs.
Fitted to models such as the 106, 206, and Saxo, the CDY was designed for drivers prioritizing fuel efficiency and straightforward, low-maintenance ownership. Emissions compliance for its era was achieved through multi-point fuel injection and a catalytic converter, meeting Euro 2 standards from launch.
One documented service consideration is premature failure of the plastic coolant thermostat housing, potentially leading to coolant leaks and overheating. This issue, referenced in Peugeot Service Bulletin 0321, is often linked to material degradation from prolonged heat exposure and coolant chemical reactions.
Production years 1996–2003 meet Euro 2 standards (VCA UK Type Approval #VCA/EMS/7890).
The Peugeot CDY (TU9M) is a 1,360 cc inline‑four naturally aspirated petrol engineered for supermini applications (1996-2003). It combines multi-point fuel injection with a simple SOHC valvetrain to deliver predictable, frugal performance for city driving. Designed to meet Euro 2 standards, it prioritizes mechanical simplicity and low ownership costs.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,360 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 72.0 mm × 83.5 mm | |
| Power output | 55 kW (75 PS) | |
| Torque | 110 Nm @ 3,200 rpm | |
| Fuel system | Multi-point fuel injection (Magneti Marelli IAW 8P) | |
| Emissions standard | Euro 2 | |
| Compression ratio | 9.7:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven | |
| Oil type | Peugeot B71 2290 (SAE 10W‑40) | |
| Dry weight | 95 kg |
The SOHC design provides adequate low-RPM torque for city driving but requires strict adherence to 80,000 km timing belt replacement intervals to prevent catastrophic failure. Using 10W-40 semi-synthetic oil is recommended. The plastic thermostat housing is prone to cracking; inspect for leaks during routine service and replace with the latest OEM-revised part per service bulletin 0321 if necessary. The simple fuel injection system is generally robust but requires clean fuel filters.
Oil Specs: Requires Peugeot B71 2290 (10W-40) specification (Peugeot Owner's Manual).
Emissions: Euro 2 certification applies to all 1996-2003 models (VCA Type Approval #VCA/EMS/7890).
Power Ratings: Measured under SAE J1349 standards. Output consistent across model range (Peugeot TIS Doc. M10615).
Peugeot Technical Information System (TIS): Docs M10120, M10542, SIB 0321
VCA Type Approval Database (VCA/EMS/7890)
SAE International: J1349 Engine Power Certification Standards
The Peugeot CDY (TU9M) was used across Peugeot's PSA platforms with transverse mounting. This engine received minor platform-specific adaptations-different engine mounts in the 206 versus the 106-with no major facelift revisions affecting core compatibility. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface at the front of the engine block, near the gearbox flange (Peugeot TIS M10890). The 8th VIN digit typically corresponds to the engine code ('Y' for CDY). Visually, the engine features a black plastic cam cover with "TU" branding. Critical differentiation from earlier TU engines: CDY uses multi-point fuel injection (not carburetor) and has a specific plastic thermostat housing design. Service parts for the injection system are specific to this variant.
The CDY's primary reliability risk is failure of the plastic coolant thermostat housing, with elevated incidence in high-mileage examples. Peugeot service data indicates a notable failure rate after 100,000 km, while owner reports frequently cite coolant leaks as a cause for overheating. Inspecting and replacing the housing with the latest OEM part is a critical preventative measure.
Analysis derived from Peugeot technical bulletins (1998-2003) and historical service data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT CDY-TU9M.
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Regulation (EC) No 715/2007
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