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A squealing or grinding noise from the front of the engine, particularly noticeable at idle. The water pump on the 2ZR-FXE hybrid engine is a mechanical belt-driven unit prone to bearing failure from 100,000 km onwards. The noise is initially intermittent and worsens over time. Replacing the water pump and the auxiliary serpentine belt simultaneously is the correct repair. Do not delay — a failed water pump can cause overheating within minutes.
Based on 51 driver confirmations
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this Toyota Corolla 2020 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
Similar rumbling noise, thought it was the water pump based on reading forums. Mechanic isolated it by removing the drive belt — noise disappeared, confirming it was belt-driven. Turned out to be the alternator bearing not the pump. £180 for a recon alternator.
Parts replaced: Remanufactured alternator
Rumbling noise from the front of the engine that changed with engine speed. Toyota dealer confirmed water pump bearing failure. Replaced under extended warranty at 67k miles. Took half a day. Completely silent now.
Parts replaced: Water pump assembly
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