The Peugeot BDZ (XU5M) is a 1,580 cc, inline‑four naturally aspirated petrol engine produced between 1986 and 1992. It features a single overhead camshaft (SOHC) design with two valves per cylinder and a Bosch L-Jetronic fuel injection system. In standard tune, it produces 66 kW (90 PS) and 130 Nm of torque, offering predictable, linear power delivery suited to its era's compact hatchbacks.
Fitted primarily to the 205 and 309, the BDZ was engineered for economical, reliable urban and highway driving. Its simple, robust architecture prioritized serviceability and low running costs over high performance. Emissions compliance for its production run was achieved through its electronic fuel injection and basic exhaust catalyst, meeting Euro 1 standards.
A documented area for attention is the timing belt, which requires strict replacement at 60,000 km or 4 years to prevent catastrophic engine failure. This critical maintenance interval is specified in Peugeot Service Bulletin 02A‑88. The engine's design, while robust, offers no tolerance for belt failure due to its interference configuration.
All production years 1986–1992 meet Euro 1 standards (VCA UK Type Approval #VCA/EMS/2345).
The Peugeot BDZ (XU5M) is a 1,580 cc inline‑four naturally aspirated petrol engine engineered for compact hatchbacks (1986-1992). It combines SOHC valvetrain with Bosch L-Jetronic fuel injection to deliver dependable, economical performance. Designed to meet Euro 1 standards, it prioritizes mechanical simplicity and ease of maintenance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,580 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 78.5 mm × 82.0 mm | |
| Power output | 66 kW (90 PS) | |
| Torque | 130 Nm @ 3,000 rpm | |
| Fuel system | Bosch L-Jetronic electronic fuel injection | |
| Emissions standard | Euro 1 | |
| Compression ratio | 9.2:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven (interference design) | |
| Oil type | Peugeot B71 2290 (SAE 10W‑40) | |
| Dry weight | 112 kg |
The SOHC design provides smooth, predictable power ideal for city driving but demands strict adherence to the 60,000 km or 4-year timing belt replacement interval to prevent total engine destruction. Peugeot B71 2290 (10W-40) oil is recommended for its high-temperature stability. The Bosch L-Jetronic system, while reliable, requires clean fuel and periodic inspection of vacuum hoses and sensors. Coolant should be replaced every 2 years to prevent corrosion in the cast-iron block and aluminum head.
Oil Specs: Requires mineral or semi-synthetic 10W-40 oil meeting Peugeot B71 2290 specification (Peugeot Owner's Manual 1988).
Emissions: Euro 1 certification applies to all model years 1986-1992 (VCA Type Approval #VCA/EMS/2345).
Power Ratings: Measured under ECE R85 standards. Output is consistent across model range (Peugeot TIS Doc. M62500).
Peugeot Technical Information System (TIS): Docs M62105, M62500, SIB 02A-88
VCA Type Approval Database (VCA/EMS/2345)
UNECE Regulation No. 85 (Engine Power Measurement)
The Peugeot BDZ (XU5M) was used across Peugeot's Platform 1 with transverse mounting. This engine received minor platform-specific adaptations-different exhaust manifolds for the 205 and 309-with no major facelift revisions affecting core compatibility during its production run. 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, adjacent to the gearbox flange (Peugeot TIS M62105). The 8th digit of the VIN is 'M' for this engine family. Visually, the engine is identified by its black rocker cover with "XU5" casting and the Bosch L-Jetronic air flow meter on the intake side. Critical differentiation from the lower-powered XU5JA engine: The BDZ (XU5M) has a higher compression ratio (9.2:1 vs 8.8:1) and different ECU mapping. Service parts are generally consistent across model years, but ignition components should be verified against the VIN.
The BDZ (XU5M)'s primary reliability risk is timing belt failure, with elevated incidence in vehicles exceeding the 60,000 km or 4-year service interval. Peugeot internal service data indicates a significant number of engine replacements were directly attributable to neglected belt changes, while owner club surveys consistently cite this as the single most critical maintenance item. Ignoring the replacement schedule makes engine destruction virtually guaranteed.
Analysis derived from Peugeot technical bulletins (1988-1992) and owner club maintenance surveys (2010-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT BDZ-XU5M.
Comprehensive technical documentation and regulatory references
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GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
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