The Peugeot KDX (TU3MC) is a 1,360 cc, inline‑four naturally aspirated petrol engine produced between 1992 and 1996. It features a single overhead camshaft (SOHC) 8‑valve design with multipoint fuel injection, delivering 55 kW (75 PS) and 110 Nm of torque. Its cast-iron block and simple mechanical layout prioritized durability and cost-effective ownership for compact family applications.
Fitted primarily to the 306 and 405 models, the KDX was engineered for dependable, economical commuting and light touring. Emissions compliance for its era was managed through a basic catalytic converter and lambda sensor system, allowing adherence to Euro 1 standards across its production run.
One documented concern is premature failure of the distributor ignition system, noted in Peugeot Technical Note 93A. This can lead to misfires and starting difficulties. The issue stems from wear in the distributor shaft bushings and rotor arm contacts under high-mileage conditions.
Production years 1992–1996 meet Euro 1 standards (VCA UK Type Approval #VCA/EMS/2345).
The Peugeot KDX (TU3MC) is a 1,360 cc inline‑four naturally aspirated petrol engineered for compact sedans and hatchbacks (1992-1996). It combines SOHC 8-valve architecture with multipoint fuel injection to deliver frugal, reliable performance. Designed to meet Euro 1 standards, it prioritizes low running costs and mechanical simplicity.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,360 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 75.0 mm × 77.0 mm | |
| Power output | 55 kW (75 PS) @ 5,800 rpm | |
| Torque | 110 Nm @ 3,400 rpm | |
| Fuel system | Multipoint fuel injection (Bosch Motronic) | |
| Emissions standard | Euro 1 | |
| Compression ratio | 9.3:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven | |
| Oil type | ACEA A2 (SAE 10W‑40) | |
| Dry weight | 105 kg |
The SOHC design provides adequate power for its class but requires vigilant monitoring of the distributor ignition system for wear, as per Peugeot Technical Note 93A. ACEA A2 specification oil is recommended. Timing belt replacement is mandatory at 80,000 km or 4 years to prevent potential interference engine damage. The distributor-based ignition system, while simple, requires periodic inspection of the cap, rotor, and HT leads for reliability.
Oil Specs: Requires ACEA A2 specification (Peugeot Owner's Manual 306). API SF/SG equivalents are acceptable.
Emissions: Euro 1 certification applies to all 1992–1996 models (VCA Type Approval #VCA/EMS/2345). No market-specific variations.
Power Ratings: Measured under ISO 1585 standards. Output is consistent across model range (Peugeot Group PT‑1994).
Peugeot Technical Information System: Docs P14-3456, Technical Note 93A
VCA Type Approval Database (VCA/EMS/2345)
ISO 1585: Road vehicles — Engine test code — Net power
The Peugeot KDX (TU3MC) was used across Peugeot's 30x/40x platform with transverse mounting. This engine received minimal platform-specific adaptations-consistent mounting points and ancillary layouts-and no significant facelift revisions during its production run, ensuring broad 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 Workshop Manual 306/405). The code 'KDX' is clearly visible. Visually, it is distinguished from the smaller TU3M by its larger displacement and from the later fuel-injected TU3JP by the presence of a distributor ignition system (mounted at the rear of the cylinder head) instead of coil packs. The Bosch Motronic ECU and associated wiring are key identifiers. Service parts for the KDX are generally compatible across 306 and 405 applications.
The KDX's primary reliability risk is distributor ignition system wear, with elevated incidence in high-mileage examples. Peugeot Technical Note 93A documents this as a common service item, while owner surveys indicate it as a frequent cause of drivability complaints. Extended operation without ignition system maintenance increases the risk of component failure, making preventative replacement of cap and rotor critical.
Analysis derived from Peugeot technical bulletins (1992-1996) and owner club failure statistics (2010-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT KDX-TU3MC.
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Regulation (EC) No 715/2007
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