Table 1 shows one common lane departure related problems of the 2021 Ford Bronco.
| Problem Category | Number of Problems |
|---|---|
| Blind Spot Detection problems |
My blis module on the passenger side does not work and I have a constant warning light displayed that there is a system malfunction. Under further investigation, this is a known design issue caused by the rear wiring harness that contains the blis sensor rubbing against components in the rear bumper. My vehicle has 31000 miles on it and is now out of warranty. Ford dealers are aware of this issue but claim it is not a recall and not under warranty. This is a safety issue.
The wiring harness is rubbing against the bumper, causing it to wear and eventually cut through. This causes an error to my bsm/cross traffic alert. I have an extended warranty, but it doesn't cover it. This is a problem I have seen on the Bronco6g forums.
I received an alert on the dash stating there was an issue with the blind spot monitoring/rear cross traffic system. It was erroring off and on for that entire drive. When I got home, I googled the issue and it appears it's a known issue with '21 and some early '22 Broncos where they factory installed the blind spot module wiring harness too close to the rear bumper. Over time, the wires rub and eventually rub bare and corrode or short out. I went out to take a look and sure enough, I had rubbed through on the driver side (photo) and the passenger side was nearly rubbed through. I have an extended warranty and it's at the dealership today. This is a manufacturing defect and should be covered (even if out of warranty) in my opinion. We will see what kind of story the dealer can come up with to wiggle out of it being covered under warranty.
While driving I lost most/all adas system. I received several alerts that kept repopulating. No cross traffic working no blind sport working no cruise control no forward collision working no lane departure working I took the rear assembly by the taillight and rear bumper. The wires and electrical components are corroded. Koons Ford annapolis maryland is requiring $1520 parts and labor. . This is a major safety problem as it was not designed correctly. Many Bronco owners are going through this. .
I have been getting a message that my blind spot and cross traffic alert deactivated because trailer is attached. I have never had a trailer attached but do have a trailer hitch- the dealer said Ford refuses to pay to have it fixed because the bumper to bumper warranty is out. The car has been garaged and has only 9,000 miles on it. This is a safety issue that I think they should cover as I have no blind spot or cross traffic warnings.
Cross traffic and blind spot monitoring/alert failed. Electrical wiring failed due to rubbing on the rear bumper causing failure of blind spot alert and cross traffic alert systems. Reliance on these systems is critical to safe operation of the vehicle.
Location of wiring from the factory for blind spot warning and cross traffic alert systems is not protected. The wiring has frayed and broken due to the wiring being unprotected, loose and rubbing on the rear bumper, causing the systems to not function. This is a blatant design defect from the factory, causing two safety systems to fail. Reporting now as, to the best of my knowledge, the manufacturer has not issued a TSB or recall and dealerships have acknowledged the issue.
I am receiving blind spot and cross traffic failure alerts in my vehicle dashboard indicating these systems are not working properly. This is a known issue by many Bronco owners. I believe its due to a bad installation design where the wires naturally rub up against the bumper and with weather exposure they are failing.
I had the cross-traffic sensor and blind spot detection sensors changed about a year after I bought my Bronco and the tech told me where the wires are housed it is wide open to the elements which cause the wires to fail. This was fixed under warranty and now 2 years later I have the same issue, and Ford will not fix since I am out of warranty. This is not only a design flaw but also a safety issue for someone who relies on those sensors to work.
The vehicle will throw a warning saying the cross trafic collision is in operable. A Ford tech looked at it and said a wiring harness is chaffed causing blind spot monitioring and cross traffic collision systems to not work. Cost of the part only is $700, not including labor. This is a very serious fault, which could result in injury and fatalitys.