I am finding this book to be very useful. The book provides troubleshooting advice that I have never received from anyone in the auto repair industry. I recently took my car in to a garage because the check engine light came on. They read the trouble code from the computer, saw that it was related to the cooling system, and immediately recommended that I replace the water pump. And since I was replacing the water pump, I might as well replace the timing belt too. Total cost $2000! The book offers several no-cost/low-cost fixes to try first. This book also suggested replacing the valve core, to resolve a slow leak in a tire. I took the tire to two tire repair shops, and neither one suggested that. It might be because the valve cores cost 50 cents, whereas they could sell me another tire for a lot more. I no longer have any faith in the auto repair industry.