Dooring is a collision in Ontario law, so the duty to stay applies
The Highway Traffic Act says nobody may open a vehicle door on a road without first making sure it will not endanger anyone else, and a bicycle counts as a vehicle under the same Act. So when a door swings into a passing rider, you are a driver involved in a collision, with the same duties as any other: remain, help, and give your name, address, licence and insurance details. A conviction for the dooring offence also carries three demerit points.
Look after the person first. A rider who gets up quickly and says they are fine may be running on adrenaline, with a wrist, a shoulder or a head injury that shows itself an hour later. Offer to call 911, and call it if there is any sign of injury. Police will then attend, and may lay a charge.
Then document. Photograph the open door at the angle it stopped, the bike and where it landed, the bike lane or road markings beside your car, and your parking position against the curb. Ask any pedestrians or nearby drivers for a name and number. Write down the rider’s details even if they say they will not be making a claim.
Who pays for the rider, the bicycle and your own door
Three different things get paid three different ways. A cyclist injured by a car can claim Ontario accident benefits through auto insurance: their own policy if they have one, otherwise through yours. The damaged bicycle is a property claim against your liability coverage, because DCPD works only between automobiles. Your own door is a collision claim on your own policy, with your deductible, and because you opened it, expect the incident to be treated as at fault.
Notify your insurance company within the week even if the rider rode away and the door looks repairable. The policy expects prompt notice of any collision, and the rider has two years under Ontario’s limitation rules to make a property claim. You want your account on file before theirs arrives.
Resist settling with cash on the sidewalk. A payment for a bent wheel does nothing about an injury claim that surfaces later, and it can muddy the file if one does. Exchange details, be decent about it, and let the insurance company handle the rider’s side.
A door forced past its stop bends the parts that hold it, not just the skin
When a rider hits an open door, the force usually drives it forward, beyond the point where the door check would normally stop it. The check strap, the arm that holds a door open at its detents, is often bent or torn from its mount. The hinges get sprung, so the door drops slightly at its rear edge and meets the striker low. The leading edge of the door can strike the back of the front fender and chip it.
The outer skin takes the visible part: a dent where a handlebar or shoulder landed, often near the window frame or along the trailing edge. On a door with a thin window frame, the frame itself can be bent outward, which shows up later as wind noise on the 401 and water on the sill after a car wash.
Check it before you drive away. Close the door slowly and watch whether it lines up with the body lines on either side, whether the gap is even top to bottom, and whether it latches on the first push. A door that will not latch should not be driven; that is a tow, not a cautious trip home.
Straightening and refitting a sprung door
The door usually comes off the car. On most modern vehicles the hinges bolt on, so the bent check strap and any hinge that has taken a set are replaced rather than bent back, and the door is rehung and adjusted until its gaps match the opposite side. Where a hinge is welded to the body, or the hinge pillar itself has moved, the job grows into measuring the opening and correcting the pillar, which takes longer.
If the paint on the skin is intact, the dent can often be worked out without refinishing. If the paint cracked, the door is repaired and refinished and the colour is blended into the fender so the eye never finds an edge. Some cars carry side-airbag sensors or wiring in the door, and a diagnostic scan may be required after the door has been off. The wiring boot between door and pillar is checked too, because a stretched harness can fail in the first cold snap.
Our estimator can tell a lot from a short video of the door opening and closing, along with photos of the hinge area and the gap at the fender. That separates a strap-and-skin job from a pillar job before anyone books a day for it.
The habit that prevents the next one
The Dutch reach is the simplest fix: open the driver’s door with your right hand, which turns your body and puts your eyes on the mirror and over your shoulder before the door moves. Check the mirror for a rider in the bike lane, and open the door a few centimetres first. On Toronto streets where a painted lane runs right beside the parking lane, passengers need the same habit on their side, especially when they hop out of a rideshare in traffic.
Questions people ask
The cyclist rode off saying they were fine. Do I still need to do anything?
Yes. Write down the time, the exact location and whatever you know about the rider, and notify your insurance company. Injuries sometimes appear the next day, and a claim can arrive long after the incident. Having your own dated account on file protects you.
Will a dooring charge affect my insurance rate?
It can. Insurance companies look at convictions and at at-fault claims when a policy renews, and how much weight they give each varies by company. Ask yours how the incident and any conviction will be recorded before you decide how to pay for your own door.
My door now needs a hard slam to shut. Is that only the check strap?
Probably not. A strap mainly controls how far the door opens and where it holds. A door that has to be slammed is usually sitting low on sprung hinges and catching the striker badly. Get it looked at before winter, when ice in a misaligned latch can stop it closing at all.
Can I replace the check strap myself?
On some cars it is a few bolts behind the door trim panel, but the trim clips break easily, and a new strap will not correct a door that has dropped on its hinges. If the gaps look uneven, the fix is alignment, not just the strap.