The Peugeot BDY (XU5M3Z) is a 1,580 cc, inline‑four naturally aspirated petrol engine produced between 1986 and 1992. It features a cast-iron block, aluminum cylinder head, and a single overhead camshaft (SOHC) with two valves per cylinder. In standard form, it delivered 65 kW (88 PS) and 128 Nm of torque, engineered for economical and reliable everyday motoring.
Fitted to models such as the 205, 309, and 405, the BDY was designed for drivers seeking straightforward, low-maintenance transportation. Emissions compliance for its era was achieved through a carbureted fuel system and basic exhaust after-treatment, meeting pre-Euro standards typical of late-1980s European vehicles.
One documented service consideration is premature wear of the timing belt tensioner pulley, which could lead to belt slippage or failure if not inspected. This issue, referenced in Peugeot Service Bulletin 0215, is often linked to age-related degradation of the pulley bearing rather than design flaw.
Production years 1986–1992 predate formal Euro emissions standards (VCA UK Type Approval not applicable for pre-1992 vehicles).
The Peugeot BDY (XU5M3Z) is a 1,580 cc inline‑four naturally aspirated petrol engine engineered for compact and mid‑size models (1986-1992). It combines a carbureted fuel system with a robust SOHC valvetrain to deliver predictable performance and straightforward maintenance. Designed for the pre-Euro regulatory environment, it prioritizes mechanical simplicity and economy.
| 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 | 65 kW (88 PS) | |
| Torque | 128 Nm @ 3,000 rpm | |
| Fuel system | Single-barrel carburetor (Solex or Weber) | |
| Emissions standard | Pre-Euro (Pre-1992) | |
| Compression ratio | 9.3:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven | |
| Oil type | Peugeot B71 2290 (SAE 10W‑40) | |
| Dry weight | 115 kg |
The SOHC design provides reliable, low-RPM torque suitable for city driving but requires strict adherence to 60,000 km timing belt replacement intervals to prevent catastrophic engine failure. Using 10W-40 mineral or semi-synthetic oil is recommended for optimal lubrication of the older valvetrain design. The carburetor requires periodic adjustment and cleaning to maintain fuel economy and prevent rough idling. Inspect the timing belt tensioner pulley bearing during every belt change per Peugeot SIB 0215.
Oil Specs: Requires mineral or semi-synthetic 10W-40 specification (Peugeot Owner's Manual 1990).
Emissions: Pre-dates Euro standards; compliant with EU Directive 70/220/EEC for its production period.
Power Ratings: Measured under SAE J1349 standards. Output consistent across model range (Peugeot TIS Doc. M20615).
Peugeot Technical Information System (TIS): Docs M20110, M20501, SIB 0215
EU Directive 70/220/EEC on vehicle emissions
SAE International: J1349 Engine Power Certification Standards
The Peugeot BDY (XU5M3Z) was used across Peugeot's PSA platforms with transverse mounting. This engine received minor platform-specific adaptations-different intake manifolds in the 405 versus the 205-with no major facelift revisions affecting core compatibility. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat boss at the front of the engine block, below the exhaust manifold (Peugeot TIS M20890). The 8th VIN digit typically corresponds to the engine code ('Y' for BDY). Visually, the engine features a black or silver rocker cover with "XU5" casting. Critical differentiation from later XU5 variants: BDY uses a carburetor, not fuel injection. Service parts for the carburetor system are specific to this variant.
The BDY's primary reliability risk is timing belt failure due to neglected replacement intervals, with elevated incidence in high-mileage examples. Peugeot service data indicates a significant failure rate after 80,000 km in poorly maintained engines, while owner reports frequently cite seized engines as a result of broken belts. Adhering to the 60,000 km replacement schedule is critical.
Analysis derived from Peugeot technical bulletins (1988-1992) and historical service data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT BDY-XU5M.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with PEUGEOT or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
PEUGEOT Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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)
UK type-approval authority for automotive products.
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.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialPEUGEOT documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
