What should you say when you drop your car off at a mechanic?

Say what the car does, when it does it, and since when. Then say you want a written estimate before any work, and that you want your old parts back. Leave a phone number and ask when they will call. That covers the three rights on the sign every California shop has to post.

Is it OK to tell a mechanic you don't know about cars?

Yes. Honest is better than bluffing, and a good shop explains things either way. Pair it with "please show me" and "put it in writing." Those two lines protect you more than knowing the parts names ever will.

Can a mechanic in California charge more than the estimate?

Not without your OK. If the job grows, the shop has to contact you, describe the added work and cost, and get your permission first. A phone OK has to be noted on the invoice with your name, phone number, date and time, per the Bureau of Automotive Repair consumer guide.

Can I get my old parts back from a mechanic in California?

Yes, if you ask before the work is done. Say it when you get the estimate so it goes on the work order. A rebuilt part may carry a core charge if you keep the old one, and parts that go back to a supplier under warranty can be seen but not kept.

How do you say thank you to your mechanic?

Pay on time, come back, and leave a review that names the car and what got fixed. Sending a friend their way means more to a small shop than anything else. A box of donuts never hurts.

What Not to Say to Your Mechanic | 9 Lines That Cost You

Why the First Thirty Seconds Matter

We fix cars in driveways and office lots from Temecula to Menifee, seven days a week. The first half minute of a call or a drop off sets up the whole job. A few common lines cost drivers real money. Not because most mechanics are crooks. Most are not. It is because some sentences hand over control of the bill.

Trust is thin on both sides of the counter. In a survey released on December 1, 2016, AAA found that two out of three U.S. drivers do not trust repair shops in general. The top reasons were shops recommending work that was not needed (76 percent) and overcharging (73 percent), per the AAA newsroom. The cheapest fix for that is not a lawyer. It is the words you use at the counter.

This guide is about what you say and ask. Here are the nine lines we hear most, worst first, and what to say instead.

1. Don't Say "Just Fix Whatever It Needs"

This is a blank check with your name on it. It tells the shop there is no limit and no need to call. Even a good shop will now fix the small stuff it would have asked about.

California law is on your side here, but only if you use it. The Bureau of Automotive Repair (BAR) says a shop must give you a written estimate before doing any work. That estimate has to list the parts, the method of repair and the total for parts and labor, before tax. The shop must stick to those parts and that method unless you agree to a change first. BAR also warns that your signature means you agree to pay up to the amount on the form, so do not sign a blank work order, per its Consumer's Guide to Auto Repair.

Say this instead. "Please call me with a written estimate before you start anything."

2. Don't Say "It Needs a New Alternator"

When you name the part, you are not asking for a diagnosis. You are placing an order. If the alternator was fine and the real fault was a bad ground or a slipping belt, you just paid for a part you did not need, and the car still does not start.

One code can mean many repairs. A cylinder one misfire can be a coil, a plug, an injector, a wiring fault, a vacuum leak or low compression. That is six jobs at six prices, which is why we test before we quote on our mobile diagnostics calls.

Give the mechanic the symptom in detail. BAR's guide lists the questions that help. Where is the noise coming from? Does it happen cold or hot? When you speed up, brake or turn? Above a certain speed? Do you feel it in the wheel or the brake pedal? Is it using oil or coolant?

Say this instead. "Here is what it does and when. Can you find out why before we pick a part?"

3. Don't Say "The Parts Store Already Told Me What It Is"

A free code scan is useful. It tells you which system is unhappy. It does not tell you which part failed. Walking in with "the parts store said it's the O2 sensor" sets up an argument you do not need, and it can push a shop to just swap the part you named.

Treat the code as a clue, not a verdict. Bring the printout or a photo of the screen. The code number and the date it showed up help a lot more than the part name the scan guessed.

Say this instead. "The scan showed P0301 last Tuesday. Here is the printout."

4. Don't Say "It Just Started" When It Didn't

This one is about what you leave out. Drivers skip the light they cleared, the shop that already tried a fix, or the fact that the noise has been there since summer. Every missing fact is time on the clock that you pay for.

Clearing a check engine light right before a visit hurts the most. The stored freeze frame data shows the conditions when the fault set, and clearing codes can wipe it. The mechanic then has to wait for the fault to come back.

Also tell them about past repairs on that system. If another shop replaced the coil pack last month, that changes where the next hour of testing goes.

Say this instead. "It came on going up the 15 on Tuesday. I cleared it Wednesday and it came back today. Another shop replaced the plugs in June."

5. Don't Stay Quiet About Your Old Parts

This is the right most drivers lose without knowing it. In California you can get your replaced parts back, but only if you ask before the work is done. BAR says to say so when the technician gives you the estimate. Ask at pickup and the shop owes you nothing.

Two catches, both from BAR. If the shop puts in a rebuilt part, the old one usually goes back to the supplier as part payment, called a core charge. You may have to pay that charge to keep it. If the part goes back to the supplier under a warranty, you cannot keep it, but you have the right to see it.

Old parts are your proof the work was done. You do not have to want them. You just have to ask.

Say this instead. "Please write on the work order that I want my old parts back."

6. Don't Say "Yeah, Go Ahead" on the Phone With No Number

The call comes at ten in the morning. "We found something else." You are at work, you are busy, you say yes. Now the bill is whatever it turns out to be.

BAR says that when a job will cost more than the estimate, someone from the shop must contact you, describe the added work and cost, and get your permission to go on. You do not have to approve by phone. If you do, the shop has to note your name, phone number, and the date and time on the invoice. Approval can also come by email or text, per BAR's auto repairs page. You can also name someone else to approve for you.

Say this instead. "What is the new total, in dollars? Text me the revised estimate and I will reply."

7. Don't Lead With "Money Is No Object" or a Number

Both ends of this hurt you. "Money is no object" invites every nice to have. "I only have $300, make it work" before anyone has looked can bend the plan to fit the number instead of the fault.

Get the full list first. Then use your budget to rank it. BAR's guide says do not feel pressured to agree to any service, ask why it is needed and whether it would void a warranty, and decline it until you have done more research if you are unsure. Once you have the written estimate, you are free to take it to another shop for a second opinion.

Say this instead. "Which of these has to be done now for safety, and which can wait a month?"

8. Don't Say "I'll Just Bring My Own Parts" Without Asking

Some shops allow it. Many will not warranty a part they did not supply, and some will not install it at all. If that part fails in three months, you may pay the labor twice.

BAR notes that California does not require a shop to guarantee its work, but many do. If a shop offers one, ask for a copy. A written guarantee has to say what it covers, how long it lasts, what is excluded, what you must do to use it, and whether it moves to the next owner.

Say this instead. "If I bring the part, what does your warranty cover? Can I get that in writing?"

9. Don't Open a Dispute With a Threat

"I'm calling my lawyer" or "I'm posting you everywhere" ends the talk. It rarely gets you a free fix. BAR's advice is plain. Ask for the service manager. Stay calm. Explain the problem and what you think a fair settlement is. Say so if you are willing to meet in the middle. If that fails, tell the manager you plan to file a complaint with BAR.

That last step has teeth. BAR assigns a case number and tells you within 10 days that it got your complaint. It cannot go to court or collect money for you, but a BAR representative will contact the shop and try to work out a fix. Keep every receipt.

Say this instead. "Here is what I think is fair. If we can't settle it, I'll file with the Bureau of Automotive Repair."

The Cheat Sheet

Screenshot this before your next visit.

Don't Say	Say Instead	Why
"Just fix whatever it needs."	"Call me with a written estimate first."	California shops must give a written estimate before any work.
"It needs a new alternator."	"Here is what it does and when."	Naming a part orders the part, right or wrong.
"The parts store said it's the sensor."	"Here is the code printout."	A code names a system, not a failed part.
"It just started."	"It began in June. I cleared it once."	Missing history costs paid diagnosis time.
Nothing about old parts	"Write down that I want my old parts."	You must ask before the work is done.
"Yeah, go ahead."	"What is the new total? Text it to me."	Extra work needs your OK, noted on the invoice.
"Money is no object."	"What is safety now, and what can wait?"	You can decline and get a second opinion.
"I'll bring my own parts."	"What does your warranty cover then?"	Guarantees are optional and must be in writing.
"I'm calling my lawyer."	"Here is what I think is fair."	BAR's own steps start with the manager.

Before You Call a Temecula Valley Shop

Every auto repair shop in California has to be registered with BAR, and that includes mobile mechanics. Before you call anyone in Temecula, Murrieta or Menifee, look the business up on the state license search. BAR says to check for any past discipline there too, or call (800) 952-5210.

Every shop must post a sign that lists three rights. A written estimate. A detailed invoice of the work done and parts supplied. Your replaced parts back, if you ask when the work order is written. If you do not see the sign, BAR says to ask about it. A mobile mechanic has no lobby wall, so ask for the registration number instead. It has to be on the final invoice, along with every part replaced and whether it was used, rebuilt or reconditioned.

The federal view lines up. The Federal Trade Commission tells drivers to get a written estimate, to ask for replaced parts, and to keep records of every visit, in its auto repair basics.

How We Handle It

When you call us we price the job on the phone, the diagnostic fee comes off the repair, and nothing extra gets done without your yes. Book a visit or call (951) 618-1982.

What Not to Say to Your Mechanic

At A Glance