2014-2018 Kia Forte Back Glass: Fitment Warnings and Shattering Issues
This guide covers the critical differences between Sedan, Koup, and Forte5 back glass, common shattering problems, and how to inspect a used replacement.
- This back glass is ONLY for the 4-door Sedan; it will NOT fit the 2-door Koup or 5-door Hatchback.
- There are two different OEM part numbers: 87110A7020 for 2014-2016 Sedans and 87111B0020 for 2017-2018 Sedans.
- When buying used, carefully inspect the defroster grid lines and electrical connectors for any damage, as this is a common failure point.
- Professional installation is required because the glass is secured with urethane adhesive, which is critical for safety and preventing leaks.
Critical Compatibility Warning: Sedan Only
Warning: The back glass for the 2014-2018 Kia Forte is specific to the 4-door Sedan body style. It will NOT fit the 2-door Koup or the 5-door Hatchback (Forte5) models. These three body styles have different rooflines and dimensions, making their glass parts completely non-interchangeable. Always verify the donor vehicle was a 4-door Sedan before purchasing a used back glass.
There is also a split in part numbers within the sedan generation:
- 2014-2016 Forte Sedan uses part number 87110A7020.
- 2017-2018 Forte Sedan uses part number 87111B0020.
You must match the correct part number to your vehicle's year to ensure proper fitment.
Symptoms of a Failing Back Glass
Failure of a back glass is usually obvious, but related electrical issues can also be a symptom.
Spontaneous Shattering
The most alarming issue is the back glass shattering completely, seemingly without cause. This is a known characteristic of tempered glass used in rear and side windows. Unlike a laminated windshield that cracks, tempered glass is under high tension and can disintegrate into thousands of small pieces 🎬 Watch: An example of spontaneous tempered glass shattering from a single point of impact, thermal shock (like a rapid temperature change), or a pre-existing flaw. On some vehicles, it has been found that the urethane adhesive used during installation can make contact with the defroster grid, creating a hot spot that weakens the glass over time and can lead to failure.
Defroster Not Working
If your rear defroster fails to clear fog or frost, the problem could be in the back glass itself. This can be caused by:
- Broken Grid Lines: A scratch or break in one of the thin orange or brown lines on the glass can interrupt the electrical circuit.
- Damaged Electrical Tabs: The main power connectors, typically soldered to the side of the glass, can break off, cutting power to the entire grid.
- Blown Fuse or Bad Relay: Before blaming the glass, it's worth checking the fuse box for a blown defroster fuse or a faulty relay 🎬 Watch: How to test a rear defroster relay, as this system draws significant power.
Buying a Used 2014-2018 Forte Back Glass
A used OEM back glass is an excellent, cost-effective option, as it guarantees the correct fit, tint, and defroster performance. However, a thorough inspection is crucial before you buy.
Step 1: Verify Vehicle of Origin
Confirm the glass came from a 2014-2018 Kia Forte 4-door Sedan. Do not purchase glass from a Koup or Forte5. Also, ensure the part number matches the year range for your vehicle (87110A7020 for 2014-2016, 87111B0020 for 2017-2018).
Step 2: Inspect the Defroster Grid and Connectors
This is the most important check. Hold the glass up to a light source and carefully inspect every horizontal line of the defroster grid. Look for any breaks, scratches, or gaps. A single broken line can render the entire system useless. Then, check the two main electrical tabs on the sides of the glass. Ensure they are firmly attached and not cracked or broken off. These are very difficult to repair properly.
Pro Tip: Use a multimeter set to continuity to test the grid. Place one probe on each of the main electrical tabs. A good grid will show continuity (a beep or a low resistance reading).
Step 3: Check for Scratches and Damage
Look for deep scratches that your fingernail can catch on. While minor scuffs are normal, deep scratches can compromise the glass's integrity. Check the edges for any chips or flaking, as this is where stress fractures often begin.
Step 4: Confirm OEM Markings
Look for the Kia or Hyundai logo and DOT (Department of Transportation) number etched into a corner of the glass. This confirms it is a genuine OEM part that meets factory specifications for fit and quality, which is often superior to cheaper aftermarket glass.
Recalls and Technical Service Bulletins (TSBs)
As of mid-2026, there are no specific recalls or Technical Service Bulletins (TSBs) from Kia or the NHTSA for spontaneously shattering back glass on the 2014-2018 Kia Forte. While owners have reported the issue on forums, it has not led to an official campaign.
Cost Comparison for Back Glass Replacement
| Part Type | Estimated Cost |
|---|---|
| New OEM (2014-2016) | $280 - $410 (Part Only) |
| New OEM (2017-2018) | $425 - $650 (Part Only) |
| New Aftermarket | $200 - $350 (Part Only) |
| Used OEM | $100 - $250 (Part Only) |
| Shop Labor | $200 - $450 |
Frequently Asked Questions (FAQ)
Will this back glass fit my 2015 Kia Forte Koup?
No. The back glass for the 4-door Sedan, 2-door Koup, and 5-door Hatchback are all different and cannot be interchanged due to their unique body shapes and rooflines.
Why did my rear window shatter for no reason?
This is called spontaneous breakage and is a known, though uncommon, issue with tempered glass. It can be caused by a nearly invisible chip on the edge, extreme temperature changes, or a manufacturing defect. The glass is under immense tension, and a small trigger can cause the entire pane to release its energy at once.
Can I repair a broken line on my rear defroster?
Yes, in many cases you can. Special repair kits are available that contain a conductive paint or epoxy. 🎬 Watch: Easy DIY rear window defroster grid repair You mask off the area around the break and apply the material to bridge the gap, restoring the electrical connection. However, if the main electrical tab has broken off the glass, the repair is much more difficult and often fails.
Is professional installation necessary for a back glass?
Yes, professional installation is highly recommended. The back glass is held in place with a strong urethane adhesive that requires special tools to remove the old glass and proper primers and techniques to install the new one. An improper installation can lead to dangerous water leaks, wind noise, and a weak bond that compromises vehicle safety and structural integrity.
Helpful Videos
Technical Specifications
OEM Part Numbers: 87110A7020 (For 2014-2016 Sedan) 87111B0020 (For 2017-2018 Sedan) 87110A7220 (For Coupe) 87110A7520 (For Hatchback)
Tempered safety glass with integrated heating element for defrost function. May also contain the radio antenna.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Kia Forte:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Critical Compatibility Warning: Sedan Only
- Symptoms of a Failing Back Glass
- Spontaneous Shattering
- Defroster Not Working
- Buying a Used 2014-2018 Forte Back Glass
- Step 1: Verify Vehicle of Origin
- Step 2: Inspect the Defroster Grid and Connectors
- Step 3: Check for Scratches and Damage
- Step 4: Confirm OEM Markings
- Recalls and Technical Service Bulletins (TSBs)
- Cost Comparison for Back Glass Replacement
- Frequently Asked Questions (FAQ)
- 🎟️ Get 5% Off