How to fix inaccurate dealership marketing attribution

What to check before you decide

Then find where the chain breaks. Do all leads enter the CRM with a source?

Are phone calls tied to the ad or page that produced them, and to the caller? Do walk-ins get a source question at the desk?

Does the DMS sale record carry the CRM customer ID? Each missing link is a blind spot.

Define your terms before you buy anything. What counts as a lead?

What counts as a sale, and when is it recorded? Which touch gets credit: the first, the last or a shared rule?

Write the definitions down and apply them to every channel, because two vendors using two definitions will give you two answers.

Close the loop with the ad platforms. Send sold-deal events back to Google and Meta as offline conversions, so the platforms can learn from real results.

Reconcile the platforms' claimed conversions against your own sales each month. Expect the claims to exceed the sales, and track the gap.

Finally, measure the things attribution cannot see. Run a simple test: pause one channel in one market for a few weeks and watch total sales and leads.

Compare cost per matched sale across channels, and treat any channel that looks free with suspicion. Good attribution tells you what to cut, not only what to credit.

Ask every vendor to show one sold deal traced end to end, with the touches found and the method used for each. A tool that cannot trace one deal will not trace a thousand.

Keep that example in the file. Repeat the test each quarter, because sources and forms change without warning.

Accept that some influence will never be traced to a click or a call, since a buyer may have seen a billboard, heard a recommendation or driven past the lot, and treat attribution reports as a way to find the obvious waste rather than as proof of which channel deserves all the credit.