2010-2018 Kia Forte Back Glass: Decoding Sedan, Koup & Forte5 Differences
This guide explains critical compatibility differences, known issues, and what to inspect when buying a used rear window for your 2010-2018 Kia Forte.
- Body style is the most critical compatibility factor; Sedan, Koup (coupe), and Forte5 (hatchback) back glass are NOT interchangeable.
- There are two distinct generations: 2010-2013 (first gen) and 2014-2018 (second gen), which use different part numbers.
- When buying used, carefully inspect the defroster grid lines and electrical connectors for any damage, as this is a common failure point.
- Due to the need for a perfect, leak-proof seal and the risk of breaking the glass, professional installation is strongly recommended.
The back glass on the 2010-2018 Kia Forte is more than just a window. It's a key part of the car's electronics and body structure. When it fails, it can be due to impact, stress, or electronic issues with the built-in defroster. This guide covers the primary failure points, part variations, and what to look for when sourcing a replacement, especially a used OEM part.
Symptoms of a Failing Back Glass
Unlike a mechanical part, back glass failure is often sudden and obvious. However, there are a few symptoms to watch for that can indicate a problem before a complete failure occurs.
- Visible Cracks or Chips: The most common failure. A small chip from a rock or other debris can quickly spread into a large crack, compromising the glass's integrity.
- Spontaneous Shattering: Tempered glass, which is used for back windows, can sometimes shatter without any apparent impact. This can be caused by internal stress from manufacturing defects, extreme temperature changes, or a small, unnoticed chip that finally gives way.
- Water Leaks: A wet headliner, trunk, or a musty smell inside the car can point to a failing urethane seal around the back glass. Over time, this seal can dry out, crack, or pull away from the body, allowing water to seep in.
- Rear Defroster Not Working: If some or all of the lines in your defroster grid don't heat up, it indicates a break in the electrical circuit. This can happen from scratches on the grid (often from loading cargo) or a failure in the electrical connectors at the edge of the glass.
- Wind Noise: A new or unusual whistling or rushing sound from the rear of the vehicle at speed can be a sign of a bad seal around the back glass.
Known Issues, Recalls, and TSBs
As of mid-2024, there are no specific recalls or widespread Technical Service Bulletins (TSBs) from Kia or the NHTSA directly related to the back glass shattering or failing on 2010-2018 Kia Forte models. While individual owners have reported spontaneous shattering online, it has not been identified as a manufacturing defect requiring a recall. The most common issues reported by owners are related to the defroster grid failing or water leaks from aging seals, which are generally considered wear-and-tear items.
🎬 Watch: How to diagnose a Kia Forte water leakWarning: The single most important factor for this part is vehicle body style. The back glass for the 4-door Sedan, 2-door Koup, and 5-door Hatchback (Forte5) are NOT interchangeable. They have different shapes, sizes, and curvatures. You must purchase the correct glass for your specific model.
Buying a Used 2010-2018 Kia Forte Back Glass
A used OEM back glass is an excellent value, offering the same fit, quality, and features as a new one at a lower price. However, you must inspect it carefully before purchase.
Physical Inspection Checklist:
- Confirm the Body Style: First and foremost, verify the donor vehicle was the same body style as yours (Sedan, Koup, or Hatchback). A seller might not know the difference.
- Check for Scratches and Chips: Run your hand over the entire surface, inside and out. Pay close attention to the edges, where chips can hide and lead to future cracks. Deep scratches on the interior side can damage the defroster grid.
- Inspect the Defroster Grid: Look closely at the horizontal lines of the defroster grid. Any breaks, scratches, or peeling sections mean that line will not work. Also, check the main power connectors (bus bars) at the sides of the glass to ensure they are intact and not corroded.
- Look for Antenna Wires: If your Forte uses an in-glass antenna, verify those wires are also intact and undamaged. They will look similar to the defroster grid but are often in a different pattern.
- Check for Tint Film: Many owners apply aftermarket tint. If you want the original factory look, ensure you're not buying glass with a film that you'll have to remove. Factory tint is embedded in the glass itself.
- Examine the Edges: Look for signs of delamination (where the layers of glass start to separate) or excessive urethane residue from a sloppy removal, which can make installation more difficult.
Pro Tip: To quickly test a defroster grid on an uninstalled back glass, you can use a multimeter set to continuity mode. Place one probe on the bus bar on one side of the glass and touch the other probe to the end of a single grid line on the opposite side. A beep or a reading of near-zero ohms indicates that specific line is intact.
🎬 See: How to test a rear defroster gridCost Comparison: 2010-2018 Kia Forte Back Glass
Prices can vary based on your location and the specific features of the glass (like an integrated antenna). The costs below are estimates for a standard tinted back glass for a Sedan model.
| Part Type | Estimated Cost |
|---|---|
| New OEM (Dealer) | $550 - $750 |
| New Aftermarket | $250 - $400 |
| Used OEM | $100 - $250 |
| Shop Labor for Installation | $150 - $300 |
Replacement Overview
Replacing a back glass is a complex job that requires precision and special tools. It involves carefully cutting the old glass out of the car's frame without damaging the paint, thoroughly cleaning the old urethane adhesive from the pinch weld, applying a chemical primer, and then laying a perfect bead of new urethane before setting the new glass in place. Because a perfect seal is critical to prevent water leaks and wind noise, and because the glass itself is large and fragile, this job is not recommended for beginners.
Frequently Asked Questions (FAQ)
Will the back glass from a 2015 Forte Koup fit my 2016 Forte Sedan?
No. The back glass for the Sedan, Koup (2-door), and Forte5 (hatchback) are all unique parts. They have different shapes and sizes and are not interchangeable under any circumstances.
What is the difference between part number 87110-1M010 and 87110-A7020?
These part numbers correspond to different generations of the Forte Sedan. Part numbers starting with '1M' (like 87110-1M010) generally fit the first generation (2010-2013), while part numbers starting with 'A7' (like 87110-A7020) fit the second generation (2014-2018). Always verify the part number with your vehicle's VIN.
Is it safe to drive with a cracked back window?
It is not recommended. Unlike a laminated windshield, the back glass is tempered, meaning it is designed to shatter into many small, pebble-like pieces when it breaks. A crack indicates the integrity is compromised, and a pothole or even closing a door too hard could cause it to shatter completely, posing a safety risk and leaving your vehicle exposed.
Can I repair a broken defroster line on my back glass?
Yes, in many cases you can. Auto parts stores sell special conductive paint or epoxy kits specifically for repairing breaks in defroster grid lines. It requires a steady hand to apply a thin, neat line over the break to restore the electrical connection.
🎬 Watch: Easy DIY rear window defroster grid repairHelpful Videos
Technical Specifications
OEM Part Numbers: 871101M010 (2010-2013 Sedan) 871101M020 (2010-2013 Sedan) 87110A7020 (2014-2018 Sedan) 87111B0020 (2017-2018 Sedan)
The back glass is made of tempered safety glass. It includes an integrated heating grid for defrosting. Some versions may also include an integrated radio antenna. The glass is typically tinted from the factory (privacy glass).
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: