This phrase might seem harmless, but it can lead to unexpected outcomes. Without specific instructions or a detailed estimate, you're essentially giving the mechanic free rein over the repairs—and that can result in a hefty bill. Mechanics may have a different interpretation of what “needs to be done” compared to your budget or expectations. Always request an estimate beforehand to maintain clarity and avoid surprises.

While it might seem like a cost-saving strategy, asking a shop to install your own parts can be problematic. It creates liability issues for the mechanic and disrupts the shop’s workflow. Additionally, commercial accounts allow shops to access quality parts at better prices, ensuring smoother operations and reliable outcomes. By bringing your parts, you risk damaging accountability if those parts fail, which could result in further expenses down the road.

Telling your mechanic what you believe is wrong based on internet searches or forum posts can undermine their expertise. While it’s good to describe the symptoms your car is experiencing, diagnosing the issue should be left to the professionals. Misdiagnoses can lead to unnecessary repairs and wasted time. Trust your mechanic to identify the problem accurately and recommend the best solution.