Why can two “OEM” engine part quotations differ by 20–30%? Recently, I had an interesting conversation with a buyer from the Middle East. She asked me about a q

Why can two “OEM” engine part quotations differ by 20–30%? Recently, I had an interesting conversation with a buyer from the Middle East. She asked me about a quotation for a list of Caterpillar engine parts. Our total quotation was around $138,770. A few minutes later, she came back and said: “Another Chinese supplier quoted about $109,000 for the same list.” That’s roughly a 20–30% difference. For genuine OEM parts, this kind of gap is usually unusual. So we started checking the list together. And in many cases in our industry, the reason behind such a price gap is not always obvious at first glance. 1️⃣ Mixed quotation (OEM + aftermarket) One common practice is mixed quotations. Some suppliers combine: 1. Genuine OEM parts 2. Aftermarket or copy parts into the same quotation. The total price looks very competitive, but the buyer may only notice the difference later during delivery or installation. From a purchasing perspective, this can easily create confusion. 2️⃣ Part number substitutions Another possibility is part number substitutions. For complex engine systems, even a small difference in part numbers can change: 1. material grade 2. manufacturer source 3. compatibility with specific engine serial numbers The parts may look very similar externally, but the supply chain behind them can be completely different. 3️⃣ What experienced buyers usually do Buyers with strong maintenance experience usually ask suppliers to clarify: 1. Which items are genuine OEM 2. Which items are aftermarket 3. Confirmation of part numbers and engine serial numbers 4. Pre-shipment photos or inspection if necessary Because in mining, construction, or power generation: Downtime is usually far more expensive than the parts themselves. A question for procurement and maintenance teams: Have you ever received two quotations for the “same” parts with a 20–30% price gap? What was the real reason behind the difference? #MiningIndustry #HeavyEquipment #MiningMaintenance #FleetManagement #EquipmentReliability #IndustrialMaintenance #PowerGeneration #ProcurementInsights #SupplyChain #MiningOperations #ZEBPower