# TLDR Review: BAKFlip MX4 Tonneau Cover for 2021 Ford F150

*Published: 2026-03-14 | Updated: 2026-03-14 | Source: https://shopsavvy.com/reviews-tldr/bakflip-mx4-tonneau-cover-for-2021-ford-f150*

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## Verdict

The BAKFlip MX4 Hard Folding Tonneau Cover for the 2021 Ford F150 5'7" bed delivers a solid mix of style, ease of installation, and improved functionality compared to earlier versions. It’s a great choice if you want a secure, sleek cover that offers full bed access without removal and is lighter than previous models. However, if you live in a colder climate or require completely watertight performance under heavy rain, you might want to carefully consider potential minor leaks and latch issues. For those seeking a very rugged option with enhanced locking or cold-weather resilience, exploring other tonneau covers might be worth it, but overall, the MX4 remains a premium, popular pick.

**Top pro:** Installs relatively easily with clear instructions and helpful YouTube videos, typically taking about 45 minutes to 1.5 hours.
**Top con:** Some users report minor leaks near the tailgate corners and recommend applying additional sealant for better water resistance.

## Product: BAKFlip MX4 Tonneau Cover for 2021 Ford F150
**Brand:** BAK
[Compare prices and price history on ShopSavvy](https://shopsavvy.com/products/bakflip-mx4-tonneau-cover-for-2021-ford-f150)

## Pros
- Installs relatively easily with clear instructions and helpful YouTube videos, typically taking about 45 minutes to 1.5 hours.
- Fits the 2021 Ford F150 5'7" bed perfectly, providing a clean and high-quality finish that improves truck appearance.
- Lightweight design compared to older models, making handling and folding back easier.
- Hard folding cover offers full bed access without removal, folding compactly and secured by straps when rolled up.
- Provides good security by keeping bed contents out of sight and effectively locked when tailgate is closed.
- Durable construction with a rigid, leak-resistant design that doesn’t encroach on bed space.
- Minor adjustments and included sealant tape improve water sealing around the tailgate area.
- Overall, owners praise the cover’s combination of style, functionality, and quality materials.

## Cons
- Some users report minor leaks near the tailgate corners and recommend applying additional sealant for better water resistance.
- Metal edges near the tailgate can be sharp and may scratch items if not filed down carefully.
- Rubber bumpers attached with 3M tape can occasionally come loose but don’t impact overall performance.
- Latches and locking mechanisms may freeze or feel cheap, particularly in colder climates, making this less ideal for northern users.
- A few users experienced water ingress during car washes or heavy rain, suggesting it’s fairly water-resistant but not fully waterproof in all conditions.
- Some negative feedback regarding product quality decline linked to manufacturer changes, with parts like end caps reportedly prone to breakage over time.
- No dedicated lock on the cover itself; security relies on the truck’s tailgate lock.

## Pros vs Cons at a Glance

| Pros | Cons |
|------|------|
| Installs relatively easily with clear instructions and helpful YouTube videos, typically taking about 45 minutes to 1.5 hours. | Some users report minor leaks near the tailgate corners and recommend applying additional sealant for better water resistance. |
| Fits the 2021 Ford F150 5'7" bed perfectly, providing a clean and high-quality finish that improves truck appearance. | Metal edges near the tailgate can be sharp and may scratch items if not filed down carefully. |
| Lightweight design compared to older models, making handling and folding back easier. | Rubber bumpers attached with 3M tape can occasionally come loose but don’t impact overall performance. |
| Hard folding cover offers full bed access without removal, folding compactly and secured by straps when rolled up. | Latches and locking mechanisms may freeze or feel cheap, particularly in colder climates, making this less ideal for northern users. |
| Provides good security by keeping bed contents out of sight and effectively locked when tailgate is closed. | A few users experienced water ingress during car washes or heavy rain, suggesting it’s fairly water-resistant but not fully waterproof in all conditions. |
| Durable construction with a rigid, leak-resistant design that doesn’t encroach on bed space. | Some negative feedback regarding product quality decline linked to manufacturer changes, with parts like end caps reportedly prone to breakage over time. |
| Minor adjustments and included sealant tape improve water sealing around the tailgate area. | No dedicated lock on the cover itself; security relies on the truck’s tailgate lock. |
| Overall, owners praise the cover’s combination of style, functionality, and quality materials. |  |

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