Typical repair cost: $100–$1,800
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Most common; affordable repair. Often leaks down the back of the engine.
Drain plug crush washer or pan gasket fails over time.
Leaks between engine and transmission — labor-intensive repair.
Common on higher-mileage engines; requires significant disassembly.
Causes crankcase pressure buildup that pushes oil past seals.
Lose more than a quart between oil changes — get it diagnosed before something seizes.
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