Buyers must prioritize OEM compatibility by verifying the specific Scania engine series (e.g., P, G, R, T series or DC09, DC13, DC16 engines). Key technical markers include the impeller material (cast iron or high-strength PPS plastic are preferred for cavitation resistance), mechanical seal quality (silicon carbide or carbon-ceramic seals to prevent leakage), and bearing load capacity. Ensure the pump meets or exceeds ISO/TS 16949 automotive quality management standards to guarantee long-term operational stability in heavy-duty trucks.