iFixit iPhone 18 Pro Teardown: Variable Aperture, Under-Display Face ID, Frame Damage

iFixit opens the iPhone 18 Pro

On September 20, 2026, iFixit published its first independent teardown of Apple's iPhone 18 Pro (and Pro Max). Coverage from 9to5Mac and iFixit's own write-up walks through the new variable-aperture main camera, a larger vapor chamber, under-display Face ID infrared hardware, and a repair red flag: the plastic display frame was damaged on three of the four units iFixit opened. Both Pro models carry a provisional 7/10 repairability score while parts and further tests continue.

This deep dive is the long-form briefing behind the BSH Technologies Instagram carousel — with primary sources linked throughout.

What happened

iFixit tore down brand-new iPhone 18 Pro hardware and published article + video teardowns the same day. 9to5Mac summarized the findings the afternoon of Sep 20, 2026 (PT). The teardown is the first hands-on look at how the year's camera and Face ID changes hold up when the display needs work.

• Primary teardown: iFixit — Inside the Tiny Unfixable Eye (Sep 20, 2026)
• News summary: 9to5Mac — iFixit tears down iPhone 18 Pro (Sep 20, 2026)

What iFixit found

Variable-aperture main camera

The main camera uses a six-blade, electromagnet-driven variable aperture (camera-app presets reported at ƒ/1.48, ƒ/1.8, ƒ/2.8, and ƒ/4.0). During disassembly, one tiny aperture blade flew out — underscoring how impractical component-level iris repair would be. iFixit says a stuck aperture would likely mean replacing the entire main camera assembly (modular and relatively accessible once the phone is open), not fixing individual blades.

Larger vapor chamber

Cooling is a headline change: iFixit describes a much larger vapor chamber (Apple specifies roughly 3× surface area) paired with a layout that moves the A20 Pro toward the thermal path. Better sustained performance is the upside; the logic-board sandwich change also puts NAND inside the board layers, which complicates storage-level repair and data recovery.

Under-display Face ID IR

The infrared camera has moved beneath the display (upper-left), while the selfie camera and IR dot projector stay in the Dynamic Island opening. Pixel gaps over the IR path make the under-display punch subtle to the naked eye. That is a design win for screen real estate — and another reason display assemblies matter for Face ID serviceability.

Plastic display frame damaged on 3 of 4 units

iFixit reports the white plastic frame around the display cracked or pulled away on three of the four iPhone 18 Pro units they opened. Display panels themselves still worked after removal; the frame is integral to the assembly, so broken plastic may keep a re-sealed phone from sitting flush and can compromise water resistance. iFixit notes other teardowns have avoided the issue, Apple has used a similar plastic frame since the 15 Pro, and four samples are too few to prove a rate — but it is the concerning repair finding called out in 9to5Mac's coverage.

Provisional repairability: 7/10

Both the iPhone 18 Pro and Pro Max score a provisional 7 out of 10 while iFixit waits on parts, runs more tests, and watches whether frame damage proves widespread. Credit goes to the screwed-in battery tray and modular camera assemblies; the score still reflects front-entry repairs that route nearly everything through the glued display.

Why it matters for buyers and repair

• Screen swaps are higher stakes. If frame damage shows up in the field, a battery or camera job can become a display-assembly job — cost and downtime go up.
• Camera failures lean toward full-module replacement. Variable aperture adds moving parts and failure modes; expect higher camera-assembly cost than prior Pros once Apple lists parts.
• Cooling vs. serviceability tradeoff. Bigger vapor chamber and board layout help thermals; NAND buried in the sandwich hurts storage repair and recovery paths.
• Score is provisional. Treat 7/10 as an early read, not a final verdict — parts pairing, Repair Assistant calibration, and frame-failure rates are still open questions.

Primary sources

• iFixit — Inside the Tiny Unfixable Eye: iPhone 18 Pro and Pro Max Teardown
• 9to5Mac — iFixit tears down iPhone 18 Pro, explores variable aperture, finds concerning repair issue

How BSH can help

At BSH Technologies we help teams think through device lifecycle, repairability, and the security/ops side of fleets — from how hardware changes affect support cost to how you document risk for buyers and internal IT. If you are evaluating the iPhone 18 Pro for a rollout, or you need a clear briefing your stakeholders can trust (with sources), our Thrissur engineers can turn teardown findings into a practical decision memo.