Pull up Google's Keyword Planner for our example market, Portland, Oregon, and type in two searches a general repair shop might want. "Tire shop near me": past top-of-page bids from $1.35 to $5.15. "Transmission repair near me": $3.26 to $11.32. Across the US the gap holds. The high end for the transmission search, $8.50, is 1.8 times the tire search's $4.67.
The auction is telling you something a shop already knows from its own repair orders. A set of tires and a rebuilt transmission are not the same ticket. A shop that runs both under one bid is either overpaying for tire clicks or losing every transmission auction it enters. Usually both.
Chapter 6 launched the searches a shop can name on exact match. This chapter puts a price on each of them, by hand, job by job, and shows the three reports that tell you whether the price is right.
One Bid for the Whole Shop Pays Tire Prices for Transmissions and Transmission Prices for Tires
Isolation, the opening campaign in our build and our name rather than a Google setting, uses manual CPC. A person types the bid. Google describes the setting plainly: you "set a maximum price on the cost of someone clicking on your ads." That maximum is a ceiling, not the bill. Google's words: your max bid is the most you'll be charged, "but you'll often be charged less, sometimes much less."
The useful part is where the bid lives. Chapter 4 split the account into ad groups by service and by make, so each one carries its own price: brakes at one number, transmission at another, Subaru at a third. The tire ad group can sit low while the transmission group bids up, and neither drags the other along.
At launch, bid on the high side. A new account has no history and no proven quality, so Google has little reason to favor its ads, and a timid bid on day one mostly buys silence. As the ads and pages earn their keep, the same position usually costs less, and the bids come down.
The Most a Brake Click Is Worth Comes From Your Repair Orders, Not Keyword Planner
Keyword Planner tells you what other advertisers paid. It can't tell you what a click is worth to your shop. That number is yours alone, and Chapter 3 laid out the pieces: the value of a car in the bay, the share of clicks that book, and the share of bookings that roll in and say yes to the work.
Here's the math with made-up shop numbers, so the steps are clear. Say a shop's repair orders show a brake customer is worth enough that it will spend up to $60 in ads to bring one in. For the booking rate, borrow LocaliQ's typical figure for auto repair campaigns until your own account has a number: 15.39% of clicks turned into a lead, meaning a call, a form or a booking. For show-and-approve, use 50% as a placeholder until your shop software says otherwise.
- $60 per brake car
- times 15.39% of clicks that become a lead
- times 50% of bookings that show and approve
- equals about $4.62, the most a brake click can cost and still pay
Run the same three numbers for every ad group. If the shop would spend $300 to land a transmission job, the same rates put that click's ceiling near $23. If the same shop would spend only $38 to land a tire customer, that ceiling comes out under $3.
Then hold the ceiling up against Keyword Planner's range. Portland's "brake repair near me" runs $2.63 to $10.00. A $4.62 ceiling sits near the bottom of that band, which tells the shop something useful before it spends a dollar: it can compete for brake clicks, but it won't win the top spot on every search, and it shouldn't try.
Below 75% Top Impression Share, a Shop's Best Brake Searches Are Going to Someone Else
Once bids are set, the question is whether they're winning. Google's answer is impression share: the share of impressions your ads got out of all the ones they could have gotten. You can see it for each campaign, ad group and keyword.
Two versions matter most for a repair shop. Search top impression share counts how many of the brake searches your ad could have reached it actually reached in the top ad slots. The absolute version is stricter: it only credits the brake ad when it was the very first ad among the top ads.
On the searches that pay the shop's bills, its main services and the makes it knows best, we want the ad in those top slots at least three times out of four, and rarely past nine in ten. Much lower, and a rival shop is answering a big slice of the drivers who typed exactly what you fix. Chasing 100% on every keyword is a different mistake: the last few top spots cost more than the cars they bring.
When the number is low, Google says why in two more columns:
- Lost top impression share (rank) means your ads lost on Ad Rank, most often the bid or the ad and page quality. Raise the bid toward its ceiling, or fix the ad and the page. The Quality Score labels from Chapter 4 point at which one.
- Lost top impression share (budget) means the daily budget was spent before the drivers stopped searching. A higher bid only burns it faster. The fix is the budget.
Read the columns for each service and make, never only the account total. A fine-looking total can hide a transmission group sitting at 30% while tires soak up the budget.
Chains Ran Every Oil Change Price Ad We Found. Auction Insights Shows When to Bid Somewhere Else.
Impression share shows how often you win. The auction insights report shows who you're up against. It names the other businesses bidding on your searches and scores each one six ways. Read two columns first. Overlap rate is how often a given rival turned up on the same brake or tire search as you. Position above rate is how often, on those shared pages, the rival's ad sat over yours.
For maintenance searches, the answer is predictable. We read the Search ads Portland's local shops ran and the ads the national chains run across the US. All 21 ads that priced or discounted an oil change came from five national chains: "$29.99 Oil Change Special," "$25 Off Oil Change," "Instant $15 Oil Change Deal." Tires and alignment made up 92 of the 205 chain ads we read. Local shops almost never put a price in an ad: 2 of their 229 ads carried a dollar figure.
So if auction insights shows the coupon chains overlapping your oil change and tire ad groups most of the time, believe it. A shop can still bid there at its own ceiling and take the clicks it can afford. What it shouldn't do is raise the bid until it outranks a coupon chain on "oil change near me." That auction rarely pays for itself on a $30 ticket, and the same money does more in the transmission, diagnostic and make ad groups, where a shop's own repair orders are bigger.
Walking away from an auction isn't losing. It's choosing which fights pay.
A Phone Call Isn't a Booked Car Until Someone Listens to It
Before raising a bid because an ad group "converts," check what it's converting. For a repair shop, much of that column is the phone ringing, and a ringing phone isn't a repair order.
Chapter 1 set calls to count past 30 seconds, and Google's recording option can grade them for you. Neither one knows your shop. Someone at the counter should still spot-check. A two-minute call asking whether you stock a part, a vendor pitching shop software and a driver who wanted the dealership all count the same as a booked brake job until a person hears them.
Pull a week of calls by ad group every so often. If the diagnostic group's calls are mostly "what does this light mean, can you just tell me over the phone," its cost per booked car is higher than the report says, and its bid should reflect that. The bid follows the cars, not the calls.
The Broad Match Campaign's Target CPA Starts at What Each Booked Car Already Cost
Manual bids are the right tool while a person can still read every search. Exploration, the broad match campaign from Chapter 6, can't work that way, because broad match brings in searches nobody listed. It runs on Maximize Conversions with a target CPA, Google's automated bidding with a cost-per-booking goal.
The target isn't a guess. Isolation has been recording what a booked car actually costs, ad group by ad group, for months. Google's own recommended target works the same way: "the average CPA from the last 30 days, adjusted for any conversion delays." Start there. Google is upfront that single bookings will land above and below that number while it tries to keep the average at the target, so judge it across weeks, not on one expensive Tuesday.
The gate hasn't moved. Exploration waits for at least 30 quality conversions a month, which most shops reach around months two or three and bigger accounts reach sooner. Google's own advice for judging a target CPA is the last 30 days with at least 30 conversions in them. Below that, there isn't enough to learn from.
Setting and adjusting these bids, ad group by ad group, is weekly work in every account our Google Ads management team runs.
Next: One Bad Repair Review in Five Says the Shop Pushed Work the Car Didn't Need. Say What Can Wait in Your Headline.
The bid gets a shop into the auction. The ad has to win the click. Chapter 8 builds repair ad headlines out of what Portland drivers wrote in their reviews, and the first thing it fixes is the fear of being upsold.
This chapter is part of Google Ads for Auto Repair, a sixteen-chapter guide for independent repair shops in every state.
