The Relay is Stellantis' large panel van (same basic vehicle family as the Fiat Ducato/Peugeot Boxer) and is sold in several wheelbase and roof-height variants (short/long/extra long, H1–H3). Modern diesel Relay engines use Euro 6 emissions hardware — DPF, EGR and often AdBlue — and the manual gearbox means clutch wear is the main transmission concern on high-mileage vans. Commercial insurance and payload specification matter in Ireland, so check the vehicle's plated payload and insurance category before purchase.

• Clutch condition and bite point — test from cold and warm for slipping or heavy wear under load.
• DPF/EGR/AdBlue behaviour — ask for evidence of successful DPF regenerations, check AdBlue filler and dosing faults.
• Signs of overload or heavy use — rear suspension sag, uneven tyre wear and deformed leaf-springs or dampers.
• Cargo area and bulkhead — look for floor corrosion under any lining, welded repairs, and integrity of any fitted racking or anchor points.
• Sliding door rollers and rear door hinges — check smooth operation and alignment, and inspect for corrosion around rear arches and door edges.