Parts procurement without a policy is procurement at retail

Parts procurement without a policy is procurement at retail

The price of a spare part is not fixed.

It varies by supplier, by urgency, by volume, by relationship, and by the amount of information the buyer brings to the transaction.

A 2023 procurement benchmarking study by Fleet Management Weekly across 200 commercial fleet operators found that the average price variance for identical OEM parts purchased without a structured procurement policy was 47%. The same component, from different sources, under different conditions, bought for between 47% less and 47% more than the median price.

The documented sources of variance

• Emergency vs planned purchasing. Parts sourced urgently command an average premium of 25–60% over parts sourced on a planned schedule from contracted suppliers, per the Automotive Aftermarket Industry Association.
• OEM vs quality-equivalent aftermarket. For standard wear parts (filters, belts, brake pads), quality-equivalent aftermarket components meeting OEM specifications are available at 30–55% of the OEM price. The Fleet Maintenance and Management Institute documents that for routine wear parts, aftermarket components meeting ISO quality standards perform comparably to OEM parts across their rated life.
• Volume consolidation. Consolidating parts spend with 3–5 approved suppliers and negotiating annual volume agreements achieves documented savings of 12–22% versus decentralised purchasing, per CIPS commercial procurement research.
• Counterfeit parts. The Automotive Anti-Counterfeiting Council estimates that 2–5% of commercial vehicle parts entering emerging market supply chains are counterfeit or significantly substandard. The cost of a $15 counterfeit oil filter failing prematurely is not $15 — it is whatever engine damage results from inadequate filtration.

A parts procurement policy requires four things

1. An approved supplier list with negotiated rates.
2. A maximum approved price per part reference.
3. A quality standard for each component category.
4. A process that separates emergency from planned purchasing in the accounting system.

Those four elements, consistently applied, close the majority of the 47% variance gap.

Sources

Fleet Management Weekly parts procurement benchmarking (2023); Automotive Aftermarket Industry Association pricing research; Fleet Maintenance and Management Institute standards; CIPS commercial procurement research; Automotive Anti-Counterfeiting Council counterfeit parts data.