Tire Blowout: Defect or Maintenance Issue?

The Bottom Line

A tire blowout at highway speed is one of the most dangerous vehicle failures -- and the critical question after the crash is whether the blowout was caused by a defective tire or a maintenance failure. The answer determines who is liable. If the tire was defective, the manufacturer may owe you compensation under NC product liability law. If the blowout was caused by neglected maintenance, the liability falls on the driver. Either way, preserve the blown tire -- it is the most important piece of evidence in your case.

Signs of a Defective Tire

Certain failure patterns strongly suggest a manufacturing or design defect rather than a maintenance problem.

Tread Separation

Tread separation occurs when the tread layer peels away from the tire carcass -- the rubber literally comes apart in layers. This is almost always a manufacturing defect. It typically results from contamination during production (moisture, debris, or oils that prevent proper bonding between rubber layers), insufficient curing (the vulcanization process that bonds rubber layers was incomplete), or adhesion failure between the steel belts and the rubber compound.

Tread separation was at the center of the massive Firestone/Ford Explorer recall in the early 2000s, which involved tread separation on Firestone ATX and Wilderness tires at highway speeds. That defect caused rollovers and was linked to hundreds of deaths.

Blowout on a Relatively New Tire

If a tire with adequate tread depth and proper inflation pressure fails -- particularly a tire that is only a few years old -- a manufacturing defect is a strong possibility. New tires should not fail under normal driving conditions. A sudden blowout on a tire with 80 percent of its tread remaining and correct inflation pressure is not a maintenance failure.

Sidewall Blowout Without Impact Damage

Sidewall failures can result from impact damage (hitting a pothole or curb), but they can also result from a defect in the sidewall construction. If the tire expert finds no evidence of impact damage -- no bruising, cuts, or deformation from an external force -- the sidewall failure may be due to a manufacturing flaw in the sidewall rubber or reinforcement.

Pattern of Similar Failures

If other owners of the same tire model have reported similar failures, the pattern points to a systemic defect. Check the NHTSA complaints database at NHTSA.gov/complaints for reports involving your tire's brand, model, and size. A cluster of complaints about the same type of failure is powerful evidence.

Signs of a Maintenance Issue

Not every tire failure is a defect. Some blowouts result from the driver's failure to maintain the tires properly.

Low tire pressure. Under-inflated tires generate excessive heat, weaken the sidewalls, and are more prone to failure. Modern vehicles with tire pressure monitoring systems (TPMS) warn drivers when pressure drops below a threshold, but TPMS systems are not foolproof and many drivers ignore the warning light.

Worn tread. Tires with tread depth below 2/32 of an inch are legally bald in most states and significantly more prone to failure. Worn tread also dramatically reduces wet traction and increases hydroplaning risk.

Overloading. Every tire has a weight rating stamped on the sidewall. Exceeding that rating -- by overloading the vehicle with passengers, cargo, or towing beyond capacity -- puts excessive stress on the tire structure.

Tire age. Rubber degrades over time through a process called oxidation, regardless of tread depth. Tires that are 6 to 10 years old may look fine on the surface but have weakened internal structure. The rubber industry generally recommends replacing tires after 6 years, and most manufacturers set a hard limit of 10 years regardless of condition.

Impact damage. Hitting potholes, curbs, or road debris can damage the tire's internal structure without visible external signs. The damage weakens the tire and can lead to failure days, weeks, or months later.

Who Is Liable for a Tire Blowout Accident?

Liability depends entirely on the cause of the blowout.

If the tire was defective: The tire manufacturer is liable under NC product liability law. If the tire was original equipment (installed by the vehicle manufacturer at the factory), the vehicle manufacturer may also be liable for selecting a defective tire. Manufacturing defects are subject to strict liability in NC -- you need to prove the tire was defective and the defect caused your injuries, not that the manufacturer was negligent.

If the blowout was maintenance-related: The driver who failed to maintain the tires bears responsibility. If that driver caused an accident that injured you, their negligence in maintaining the vehicle is the basis of your claim against them.

If a tire shop recently serviced the tires: If a tire shop mounted the tire improperly, inflated it to the wrong pressure, failed to identify damage during a rotation or inspection, or installed the wrong size tire, the shop may be liable for negligent service. Keep all receipts and records from tire shops.

Preserving the Tire as Evidence

If you suspect the blowout was caused by a defect, evidence preservation is critical.

Retrieve the tire immediately. If the tire came off the vehicle or was left at the scene, send someone to retrieve it as soon as possible. Highway cleanup crews and tow companies may discard road debris, including your tire, within hours.

Store it properly. Keep the tire in a dry, indoor location. Do not expose it to extreme heat or sunlight, which can further degrade the rubber and compromise the expert's analysis.

Do not attempt to repair or alter it. Leave the tire in its post-failure condition. Any alteration -- even well-intentioned cleaning -- can destroy evidence of the failure mechanism.

Have an independent tire expert examine it. A qualified tire engineer can analyze the failure pattern, examine the internal construction, test the rubber compound, and determine whether the failure was caused by a manufacturing defect, design flaw, or maintenance issue. Your attorney can arrange this examination.

The DOT Tire Identification Number

Every tire sold in the United States has a DOT tire identification number (TIN) molded into the sidewall. This number is a critical piece of evidence in tire defect cases.

The DOT TIN includes the manufacturer code identifying who made the tire, the plant code identifying which factory produced it, the tire size code, and the date code -- the last four digits show the week and year of production (for example, 2419 means the 24th week of 2019).

This information serves several purposes. It identifies the specific manufacturer for your claim. It determines the tire's age, which is relevant to both defect and maintenance analysis. It identifies the specific production run, which can be cross-referenced with recall notices and NHTSA complaints. And it connects your tire to other tires from the same batch if there is a pattern of failures from a specific production run.

NC Product Liability Law for Tire Defects

NC product liability law treats tire defects the same as other automotive component defects.

Manufacturing defects -- such as contamination during production, improper curing, or bonding failures -- are subject to strict liability. You prove the tire was defective and the defect caused your injuries. The manufacturer is liable regardless of how careful their quality control procedures were.

Design defects -- such as an inherently flawed tread pattern or sidewall construction that makes the tire prone to failure under normal conditions -- are subject to a negligence standard. You must prove the manufacturer knew or should have known the design was dangerous and that a safer alternative design existed.

When Both a Defect and Maintenance Contributed

Sometimes the analysis is not clean. A tire may have had a minor manufacturing flaw that would not have caused failure on its own -- but combined with the driver's under-inflation or overloading, the flaw became critical. In these situations, multiple parties may share liability.

This is where expert testimony becomes essential. A tire engineer can evaluate whether the defect alone was sufficient to cause the failure, or whether the maintenance failure was a contributing factor. Your attorney will navigate the allocation of liability among the tire manufacturer, the vehicle manufacturer (if applicable), and potentially the driver.

Frequently Asked Questions

Frequently Asked Questions

How do I know if my tire blowout was caused by a defect?▾

Signs of a defective tire include tread separation (the tread peels away from the tire body), blowout on a relatively new tire with adequate tread depth and proper inflation, sidewall failure without evidence of impact damage, and a history of similar failures in the same tire model in the NHTSA complaints database. If the tire was relatively new, properly inflated, had adequate tread, and there was no road hazard impact, a manufacturing defect should be investigated.

What should I do with the blown tire after an accident?▾

Do NOT discard the blown tire. It is the single most important piece of evidence in a potential product liability claim. Store it in a safe, dry location and do not allow anyone to dispose of it. Have your attorney send a spoliation letter to preserve the evidence. An independent tire expert can examine the tire to determine whether the failure was caused by a manufacturing defect, design flaw, or maintenance issue.

Who is liable for a tire blowout accident in NC?▾

Liability depends on the cause of the blowout. If the tire was defective, the tire manufacturer and potentially the vehicle manufacturer (if the tire was original equipment) are liable. If the blowout resulted from improper maintenance, the driver is responsible. If a tire shop recently serviced the tires and made an error such as improper mounting, over-inflation, or under-inflation, the tire shop may be liable for negligent service.

How do I find out if my tire model has been recalled or has known defects?▾

Check the NHTSA recall database at NHTSA.gov/recalls and the NHTSA complaints database at NHTSA.gov/complaints. You will need information from the DOT tire identification number on the tire's sidewall, which includes the manufacturer, production plant, tire size, and the week and year of production. This number identifies the exact tire for recall checks and can determine if your tire was part of a defective production batch.