2016-2019 Smart Fortwo Back Glass: Coupe Fitment, Spoilers, and Wiper Options
This guide covers the critical details for replacing the back glass on a third-generation (W453) Smart Fortwo, including how to buy the correct used assembly.
- This back glass fits 2016-2019 Smart Fortwo COUPE (W453/C453) models ONLY; it will not fit the Cabriolet.
- Before buying a used part, you must verify if your car has the rear wiper option and purchase a glass that matches (with or without the wiper motor hole).
- The part is almost always sold as a complete assembly with the upper spoiler and third brake light bonded to the glass.
- New aftermarket versions are not widely available, making used OEM the most practical replacement option.
Symptoms of a Damaged Back Glass
Because the rear window is made of tempered glass, it typically fails completely rather than just cracking. This is a safety design to prevent large, sharp shards.
- Complete Shattering: The most common failure is the glass shattering into hundreds of small, cube-like pieces. This can be caused by an impact from road debris, vandalism, or even significant thermal stress from the defroster or rear-engine heat.
- Stress Cracks: Hairline cracks may appear, usually starting from an edge. Due to the tension in tempered glass, these cracks compromise the entire pane's integrity and often lead to shattering.
- Water Leaks or Wind Noise: A failing adhesive bond between the glass and the body can allow water to enter the cabin or cause excessive wind noise at speed. This indicates the seal has been compromised. 🎬 Watch: How to find and fix a leaking rear window
- Rear Defroster Failure: If the horizontal lines in your rear glass no longer clear frost or fog, it means the printed electrical grid has been damaged. While the glass may be intact, this is a functional failure.
Warning: A damaged or shattered back glass requires immediate attention. It exposes the vehicle's interior to weather and theft and compromises the vehicle's structural integrity.
Buyer's Guide: What to Check on a Used 2016-2019 Fortwo Back Glass
Sourcing a used OEM back glass is often the most cost-effective solution, especially since new aftermarket options are difficult to find. Pay close attention to these details to ensure you get the right part.
1. Critical: Coupe (C453) vs. Cabriolet (A453)
The single most important check is confirming the donor vehicle. The back glass from a Coupe (hatchback) is completely different from the rear window on a Cabriolet (convertible) model. They are not interchangeable. This guide and the specified part numbers are for the Coupe model only.
2. Inspect the Full Assembly
This part is almost always sold as a complete assembly, including the glass, the upper spoiler, and the third brake light. Do not assume you can easily swap these components from your old glass, as they are often bonded together.
- Spoiler Condition: Check the plastic spoiler for cracks, deep scuffs, and broken mounting tabs.
- Third Brake Light: Ensure the lens isn't cracked or faded and that the wiring pigtail is intact.
3. Verify the Rear Wiper Option
The back glass was available in two versions: one with a hole for the rear wiper motor and one without. You must purchase the version that matches your car's factory equipment. Inspect the used glass to confirm the presence or absence of the wiper motor hole near the bottom center.
4. Physical Glass Inspection
- Scratches and Chips: Run your hand over the entire surface to feel for deep scratches or chips that could compromise strength. Minor surface scuffs are cosmetic, but anything you can catch a fingernail on is a red flag.
- Defroster Grid: Look closely at the thin orange or brown horizontal lines of the defroster grid. Check for any breaks or scratches in these lines. A single broken line will cause the entire defroster to fail.
- Seals and Bonding: If any of the original adhesive or rubber trim is still attached, check that it isn't brittle, cracked, or peeling away from the glass.
Pro Tip: When buying online, ask the seller for high-resolution photos of the defroster grid and the area around the wiper motor hole (or lack thereof). Confirm the part number (e.g., A4536780100) matches what is listed for your vehicle.
Known Issues, TSBs, and Recalls
As of mid-2024, there are no official recalls or Technical Service Bulletins (TSBs) from the National Highway Traffic Safety Administration (NHTSA) specifically for the back glass, hatch, or spoiler on 2016-2019 Smart Fortwo models. Failures are typically due to external factors like impact or thermal stress rather than a manufacturing defect.
Cost Comparison for Fortwo Back Glass Replacement
| Part Type | Estimated Cost | Notes |
|---|---|---|
| New OEM | $700 - $950 | May require special order from a Mercedes-Benz/Smart dealer. Price is for the full assembly. |
| New Aftermarket | Not Widely Available | Aftermarket manufacturers do not appear to widely produce this specific back glass assembly, making this option rare or nonexistent. |
| Used OEM | $350 - $550 | The most common replacement option. Price varies based on condition and included components (spoiler, wiper motor). |
| Shop Labor | $200 - $450 | Labor for a bonded glass installation typically takes 2-3 hours. | 🎬 See this DIY rear windshield replacement walkthrough
Frequently Asked Questions (FAQ)
Is this the same as the rear hatch?
Yes and no. The Smart Fortwo has a unique two-piece tailgate. The lower part is a small, fold-down metal tailgate. The upper part is this back glass assembly, which functions as a top-hinged hatch. 🎬 Watch: How to replace the rear hatch window struts When people refer to the 'rear hatch,' they are typically talking about this glass part.
Can I just replace the glass and keep my old spoiler?
This is not recommended. The spoiler is typically bonded to the glass from the factory. Attempting to separate them without damaging the spoiler is very difficult and often results in breakage. It is best to purchase a complete assembly.
Will this back glass fit a 2015 or older Smart Fortwo?
No. This part is specific to the third-generation (W453) Fortwo, sold from 2016-2019 in the US. The back glass from the previous generation (W451, sold up to 2015) is a different size and shape and will not fit.
Does replacing the back glass require camera recalibration?
Generally, no. The 2016-2019 Smart Fortwo's advanced driver-assistance systems (ADAS) do not typically rely on cameras mounted in the rear glass. However, if your vehicle has an optional rearview camera mounted near the hatch area, it is good practice to verify its function after the replacement is complete.
Helpful Videos
Technical Specifications
OEM Part Numbers: 4536780100 A4536780100 4537900088 A4537900088
Material: Tempered Glass. Includes: Integrated upper spoiler, high-mount third brake light. Options: Available with or without opening for rear wiper motor.
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.
- Smart Fortwo:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Symptoms of a Damaged Back Glass
- Buyer's Guide: What to Check on a Used 2016-2019 Fortwo Back Glass
- 1. Critical: Coupe (C453) vs. Cabriolet (A453)
- 2. Inspect the Full Assembly
- 3. Verify the Rear Wiper Option
- 4. Physical Glass Inspection
- Known Issues, TSBs, and Recalls
- Cost Comparison for Fortwo Back Glass Replacement
- Frequently Asked Questions (FAQ)
- 🎟️ Get 5% Off