How many miles would a well taken care of Aurora go before major repairs are required like engine and transmission rebuild or timing chain changes?

A well-maintained Toyota Aurora (assuming you mean a Toyota Avalon, as there's no Toyota model called Aurora) could easily surpass 200,000 miles before needing major repairs like an engine or transmission rebuild, or a timing chain replacement (assuming it has one; some models use a timing belt). Reaching 300,000 miles isn't unheard of with diligent maintenance.

However, this is a range, not a guarantee. Several factors influence longevity:

* Regular Maintenance: Following the recommended service schedule religiously is crucial. This includes oil changes, fluid flushes, and inspections.

* Driving Habits: Aggressive driving puts more stress on the engine and transmission, reducing lifespan. Gentle acceleration and braking extend longevity.

* Climate: Extreme temperatures (both hot and cold) can accelerate wear and tear.

* Road Conditions: Frequent driving on rough roads increases stress on the vehicle's components.

It's important to note that even with meticulous care, some components will eventually wear out and need replacement before others. Smaller repairs and replacements (brakes, suspension parts, etc.) are expected well before reaching 200,000 miles. The major components like the engine and transmission are what's referenced in the question.