Do You Have to Take a Breathalyzer in Michigan?

Red and blue lights behind you, and an officer asks you to "just blow into this." In the moment, most people don't realize there are actually two different breath tests in Michigan — and the right answer isn't the same for both. Whether you have to take a breathalyzer in Michigan depends on which test you're being asked to take, and getting that distinction wrong can cost you your license before you ever see a courtroom. Here's the plain-English version. If you're facing an OWI, see our criminal defense practice.

Two different "breathalyzers" — this is the whole thing

Michigan law treats the roadside handheld test and the station test very differently, and blurring them is the mistake that hurts people:

• The roadside PBT (Preliminary Breath Test) is the small handheld device an officer uses before an arrest, on the side of the road. For most drivers (non-commercial, over 21), refusing the PBT is a civil infraction — a small fine, not a crime. You generally can decline it.
• The evidentiary chemical test is the bigger machine (or a blood draw) done after you're arrested, usually at the station. This one is governed by implied consent — and refusing it carries serious, automatic consequences.

That difference — roadside vs. post-arrest — is the single most important thing to understand about this question.

Michigan's implied consent law

By driving on Michigan roads, you've already agreed to something. Under the state's implied consent law (MCL 257.625c), anyone who drives is considered to have consented to a chemical test of their breath, blood, or urine if lawfully arrested for operating while intoxicated.

Refuse that post-arrest evidentiary test, and here's what happens automatically — separate from the OWI case itself:

• Six points added to your driving record, and
• A one-year license suspension for a first refusal (longer for a second within seven years).
• The refusal is reported and the suspension is administrative — it can take effect even if you're never convicted of the OWI.

And refusing usually doesn't even stop the test: police can, and often do, get a search warrant to draw your blood anyway.

So what should you actually do?

This is where general information ends and real legal judgment begins — because the right move depends on facts we can't cover in a blog post. What's worth knowing going in:

• The roadside PBT and the post-arrest chemical test are not the same decision, and they carry very different consequences.
• Refusing the evidentiary test triggers a license suspension on its own, and you have a very short window (14 days) to request a hearing to challenge it.
• Staying calm, polite, and non-combative helps you no matter what you decide. Arguing on the roadside never does.

The one universal move: if you've been arrested for OWI — whether you took the test or refused it — talk to a lawyer immediately, because both the criminal case and the license consequences move fast.

The clock you don't know is running

Most people focus on the criminal charge and miss the administrative one. That 14-day window to contest an implied-consent suspension runs quietly in the background, and missing it can cost you your license even in a case you'd otherwise win. It's one of the most common — and most avoidable — ways a stop turns into a year without driving.

When to call ELN

If you refused a breath test, took one, or aren't sure what you agreed to, don't sort it out alone against a deadline. ELN Law defends Michigan drivers on OWI charges and the implied-consent license fight that rides alongside them — because winning one and losing the other still leaves you off the road. Reach out through our criminal defense practice or schedule a consultation before the clock runs out.

You Call You Win.