Alpine A390 Seat Belt Extender | Certified Safety & Perfect Fit
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Alpine A390 Seat Belt Extender | Certified Safety & Perfect Fit
Buckle Up Comfortably in Your Alpine A390
The A390 is Alpine's five-seat electric sports fastback, and the cabin was deliberately narrowed to give the car its wide haunches. Add a two-tier center console up front and a low fastback roofline over the rear bench, and buckling up gets fiddly. A seat belt extender brings the latch back within comfortable reach.
The Problem
Alpine narrowed the A390's cabin for the sake of its exterior shape, so there is less lateral room than the car's footprint suggests. Up front, a tall two-tier console sits alongside the buckle stalk, and on GTS models the Alcantara bucket seats add firm side bolsters on top of that. In the rear, the sloping fastback roof means passengers duck in and settle low, with a protruding trim element on the central tunnel eating into the space. For broader passengers, anyone in a coat, or people with restricted reach, the latch ends up somewhere you cannot easily see or grab.
The Solution
A purpose-built extender lifts the connection point clear of the console and the seat bolster, into open space where your hand already sits. One click into the car's buckle, one click with your existing belt tongue, and you are secured comfortably, with no reaching and no risk of a penalty for riding unbelted.
Why safety-first matters here
E4 & E8 Certified
Tested and type-approved to European safety standards.
UK Registered Factory
Manufactured in a facility operating to ISO/TS quality standards.
Exceeds Break-Strength
Built to surpass international break-strength tests for three-point belts.
Choose the style that fits how you drive
Browse the full range on our Alpine seat belt extenders page, then pick the style that matches your seat, your trim, and your reach.
| Style | Best for |
|---|---|
| Regular | Woven webbing that adds flexible reach between your belt tongue and the receptacle. The usual choice for the rear bench, and often enough up front on GT trim with its flatter seats. |
| Rigid | A solid section that stands upright and holds the buckle above the bolster line. The stronger choice on GTS trim, where the bucket seats have deeper sides. |
| Universal | Fits compatible seat belt systems across multiple vehicles. Confirm the buckle and fitment specifications before ordering. |
Alpine A390 fitment details
| Feature | Detail |
|---|---|
| Model years | 2025 onward (all-electric A390 sports fastback, GT and GTS) |
| Tongue width | [8mm to 11mm] buckle configuration |
| Material | Woven seat belt webbing or rigid metal extension, with a smooth-finish metal latch |
| Seat positions | Front driver, front passenger, second row window, second row middle |
| Cabin space | Cabin space varies sharply across the range. The A290 extender fits the smaller electric hatch, and the A110 extender fits the two-seater, where the seat bolster rather than the console is the obstacle. |
| Trim note | GT uses Nappa leather seats, GTS uses deeper leather and Alcantara buckets, so front-seat clearance differs between the two |
| Rear seat note | The centre rear belt uses a different stalk from the window seats, so order it separately |
| Finish | Sleek design in multiple colour choices to blend with your interior |
| Certification | E4 or E8 type-approved |
Pick the shortest length that works
We recommend adding only the minimum length you need to buckle comfortably. More webbing is not safer, it just adds slack.
1.Find your seat and trim
Select the exact position, and note whether you have GT or GTS seats up front.
2.Measure the gap
Up front, measure the height needed to clear the console and seat side. In the rear, measure the reach across your lap while seated normally.
3.Need help?
Our team offers step-by-step support to confirm the optimal length and style for your A390.
Made for
- ✦Plus-sized drivers and passengers
- ✦GTS owners sitting inside deeper bucket bolsters
- ✦Rear passengers under the low fastback roofline
- ✦Anyone with mobility or reach limitations
Good to know
- ✦Fitment is buckle-specific, so always match your vehicle, trim, and seat
- ✦The A390 shares its underpinnings with the Renault Scenic E-Tech, though Alpine fits its own seats
- ✦After folding the 60/40 rear bench, check that belts and stalks are sitting clear before use
Satisfaction Guarantee
Try it in your A390. If it is not right for you, return it within the guarantee window.
Certified Quality
E4/E8 approved and built in a registered facility to exceed break-strength tests.
Free Shipping
Your extender ships free, so there is nothing extra to worry about at checkout.
Questions, answered
Free standard UK & US shipping on all orders, with processing in 1–2 business days and delivery in 2–5 business days after dispatch (longer during peak periods). You'll get a confirmation email with tracking once your order ships. Plus, every purchase is backed by a 30-day money-back guarantee — if you're not happy with the product, just return it for a full refund.