Potential Manufacturing Defect Could Pose Significant Safety Risks

A BMW 740Li Long (2014) owner has reported a critical safety-related manufacturing defect involving the windshield bonding of their vehicle. According to an authorized BMW service center in Konstanz, Germany, a ~20 cm section of the upper edge of the windshield was not sealed at the factory. This absence of adhesive is not the result of wear or external influence and represents a serious deviation from production and safety standards.

The owner emphasizes that this is not a warranty issue, but a matter of product liability and road safety, raising concerns that at high speeds or in the event of a collision, the windshield could potentially detach, leading to potentially fatal consequences.

BMW’s Official Response

BMW’s customer service Bayerische Motoren Werke Aktiengesellschaft i. V. i. V. Michael Granseuer Head of Complaints Management Torsten Mundry Complaints Management Team Leader Board Matters, in correspondence dated January 8, 2026, stated that the issue had been considered and the case was considered answered, refusing to engage further on the matter. This response has raised serious concerns about corporate accountability and transparency regarding vehicle safety.

BMW Customer Service executives, including Michael Granseuer (Head of Complaints Management) and Torsten Mundry (Team Leader, Board Matters), appear to have minimized or dismissed a serious safety concern regarding the unbonded upper windshield section in 2014 BMW 740Li vehicles.

It remains unclear whether this stems from negligence, internal oversight, or other interests, but the lack of action raises serious questions. BMW provides factory-level warranty and quality assurance before a vehicle is sold, yet there is no guarantee that drivers can detect an unbonded windshield.

Such a defect can only be discovered through inspection or in extreme cases at high speed, highlighting the potential danger. Forum reports and consumer complaints indicate that hundreds of thousands of vehicles may be affected, suggesting this is not an isolated incident.

Regulators, including German safety authorities, and BMW’s top management are now being asked: How will these responsible parties respond to this safety issue, and what measures will be taken to prevent similar oversights in the future? How will BMW ensure that the factory-level quality assurance process truly guarantees that critical components, like the windshield, are properly bonded before vehicles reach customers?

Technical Risk

The windshield is a structural element of vehicle safety. Its bonding contributes to:

• Passenger compartment rigidity
• Airbag deployment effectiveness
• Prevention of windshield detachment in collisions or high-speed travel

Failure to properly bond the windshield compromises these safety functions, even if the risk is subtle in daily driving.

Similar Cases Worldwide

Investigation shows that similar problems have been reported across multiple BMW 7 Series vehicles:

• NHTSA complaints (USA) highlight windshield adhesion issues in several 2013–2016 7 Series vehicles.
• BMW Technical Service Bulletins (TSBs) document cases of windshield sealant gaps, advising factory-level re-sealing procedures.
• Online forums and consumer reports confirm multiple instances of windshields with incomplete bonding, leading to customer concern and potential safety risk.

These cases indicate that the defect may affect more than a single vehicle.

Call for Immediate Action

The vehicle owner and safety advocates are calling on:

1. German Federal Motor Transport Authority (KBA) to launch an immediate investigation.
2. European Union road safety authorities to evaluate potential risks in affected BMW 7 Series vehicles.
3. BMW Board and Top Management to provide a detailed public explanation of how such a defect passed production and quality control checks, and what measures will be taken to prevent further risk.
4. BMW Customer Service representatives, including Michael Granseuer (Head of Complaints Management) and Torsten Mundry (Team Leader, Board Matters), have been cited in official correspondence as responsible for handling this safety-related complaint.
5. While BMW has formally considered the issue as if “answered,” the failure to provide a transparent, thorough investigation raises serious questions about accountability and oversight. Regulators and the public are calling for independent review of decision-making processes by these officials to ensure that potential safety defects are properly addressed.

Legal and Ethical Implications

While BMW has dismissed the individual claim, unaddressed safety defects in high-speed vehicles constitute a serious corporate responsibility issue. Industry experts stress that product liability, even in the absence of accidents, must be taken seriously to protect human lives and maintain public trust.

“If these concerns remain uninvestigated, it raises serious questions about corporate responsibility, quality control, and potential negligence in vehicle safety assurance.”

Conclusion

BMW 7 Series owners, regulators, and safety watchdogs are urged to pay attention to these findings. With potentially thousands of vehicles affected, immediate review

BMW Sunroof / Front Windshield Seal Gap Issue

Yes — such an issue is documented in BMW technical sources. In certain BMW models, the front windshield / sunroof (panoramic roof) sealing and gap problem has been officially recorded. Some service centers recommend inspecting and correcting the adhesive and sealing on affected vehicles.

• TSB titled “Front sunroof glass seal gap” (2021, 2023, and earlier) notes that a gap can form in the front sunroof glass seal, potentially causing wind noise or water leakage. BMW recommends proper sealing and application of new adhesive.
• This is not limited to 2014 models; newer models also exhibit this issue, and BMW advises sealant application to correct gaps.