Audi e-tron Rear Drive Motor Coolant Catch-Can Inspection & Filter Change A small plastic container under your Audi e-tron is one of the best early-warning systems you have against a five-figure drive motor repair. Here's what it does, why it needs regular inspection, and what to watch for on your dash. The Audi e-tron (2019–2023 e-tron and e-tron Sportback, plus the 2024 Q8 e-tron and SQ8 e-tron) is quiet, quick and remarkably low-maintenance compared to a gas-powered Audi. No oil changes, no spark plugs, no timing belts. But "low-maintenance" isn't "no-maintenance," and one service item on the e-tron schedule matters more than most owners realize: the rear drive motor coolant catch-can inspection and cartridge (filter) replacement. Skipping it won't cause an immediate problem. What it can do is let a slow internal coolant leak go unnoticed until the rear electric motor is damaged — and by then, the fix is usually a c ... read more