BRITAX RÖMER DUALFIX 5Z CAR SEAT
2000040859BRDF5Z
Britax Römer DUALFIX 5Z guarantees safety and protection. 360° rotation. Offers 6 reclining positions in both directions, 5-point harness and washable cover. Requires the VARIO BASE 5Z base for installation.

2000037579
- BRITAX RÖMER DUALFIX 5Z CAR SEAT
- ISOFIX BASE BRITAX RÖMER VARIO 5Z (2000037579)
2000037579
20000394BS5Z2
- BRITAX RÖMER DUALFIX 5Z CAR SEAT
- ISOFIX BASE BRITAX RÖMER VARIO 5Z (2000037579)
- BRITAX RÖMER BABY SAFE PRO CAR SEAT (20000394BS5Z2)
20000394BS5Z2
2000037579
20000379SMILE5Z
2000037CBR5Z
- BRITAX RÖMER DUALFIX 5Z CAR SEAT
- BRITAX RÖMER BABY SAFE PRO CAR SEAT (20000394BS5Z2)
- ISOFIX BASE BRITAX RÖMER VARIO 5Z (2000037579)
- BRITAX RÖMER SMILE 5Z STROLLER (20000379SMILE5Z)
- CARRYCOT BRITAX RÖMER SMILE 5Z (2000037CBR5Z)
Britax Römer · UN R129 (i-Size) · Follow-on seat (after infant carrier)
Britax Römer DUALFIX 5Z i-Size Car Seat · 360° Rotation with SICT inside
The DUALFIX 5Z is an excellent next step after the BABY-SAFE PRO or other infant carriers: it clicks onto the VARIO BASE 5Z (required) and gives you 360° rotation, extended rearward-facing and premium day-to-day comfort with 12 recline positions.
What matters in 15 seconds
Important: VARIO BASE 5Z is required
The DUALFIX 5Z cannot be used without the VARIO BASE 5Z. The seat clicks onto the base. The base installs in the vehicle using ISOFIX + a support leg, adding stability and making daily use simpler.
Check your vehicle
The base is designed for i-Size seating positions or compatible ISOFIX seats. Check your vehicle handbook or the manufacturer’s Fit Finder.
Click & go
Place the seat onto the base and it locks in. Ideal if you want a consistent, quick system after an infant carrier.
Support leg stability
The support leg helps reduce unwanted movement and adds extra stability to the base + seat setup.
Why the DUALFIX 5Z works so well in real life
A clear, decision-ready summary: protection, comfort, ease of use, and growth.
1) 360° rotation for easy buckling
Rotate towards the door in tight parking spaces, seat your child comfortably, buckle calmly, then rotate back to travel position.
2) Side impact protection with SICT inside
SICT inside is integrated side-impact protection designed to help manage energy in the event of a side collision.
3) 12 reclines for genuine comfort
With 6 rearward-facing and 6 forward-facing recline positions, you can fine-tune posture for naps or upright exploring.
4) Grows with your child (V-shaped headrest + 5-point harness)
The V-shaped headrest adjusts as your child grows, while the 5-point harness helps distribute forces in a collision.
Tip: within the approved range, many safety specialists recommend keeping children rearward-facing for as long as possible.
Key specifications (AI- and search-friendly)
Clear data first. Great for comparing, indexing, and quick decision-making.
| Britax Römer DUALFIX 5Z i-Size · Main specifications | |
|---|---|
| Approval | UN R129 (i-Size) |
| Seat type | Follow-on car seat after an infant carrier (commonly used from ~3 months) |
| Rotation | 360° (rearward-facing and forward-facing use) |
| Recline | 12 positions (6 rearward + 6 forward) |
| Harness | 5-point harness |
| Side impact protection | SICT inside (integrated) |
| Headrest | V-shaped, adjustable |
| Installation | Requires VARIO BASE 5Z (mandatory). Base installs with ISOFIX + support leg. |
| Made in | Germany (engineering and rigorous testing) |
| Cover | Machine washable, removable without taking off the harness |
Quick comparison: DUALFIX PRO vs DUALFIX PLUS vs DUALFIX 5Z
A practical table to choose based on your setup: base requirement, recline options, and usage profile.
| Feature | DUALFIX PRO | DUALFIX PLUS | DUALFIX 5Z |
|---|---|---|---|
| Approval | UN R129 (i-Size) | i-Size (UN R129) | UN R129 (i-Size) |
| 360° rotation | Yes | Yes | Yes |
| Recline | 6 positions (per your previous page copy) | Multiple positions | 12 positions (6 + 6) |
| Typical use | From birth (40–105 cm) | From birth (40–105 cm) | Follow-on after infant carrier (from ~3 months) |
| Base required | No | No | Yes (VARIO BASE 5Z required) |
| Best for | All-in-one + rotation + from-birth usability | 360° + extended rear-facing + straightforward daily use | Base system + 12 reclines + SICT inside |
Note: this comparison is built from the information you provided. If you want it 100% exact, share the final official ranges and recline counts for PRO and PLUS from your approved product pages.
Frequently asked questions
Can I use the DUALFIX 5Z without the VARIO BASE 5Z?
No. The DUALFIX 5Z requires the VARIO BASE 5Z for safe installation and use. Without the base, the seat cannot be used.
How long can my child ride rearward-facing?
The DUALFIX 5Z supports extended rearward-facing within the model’s approved limits. Many safety specialists recommend keeping rearward-facing as long as possible.
What does SICT inside do?
It is integrated side-impact protection designed to help manage energy in a side collision and add an extra layer of protection.
Does it recline?
Yes. It offers 12 recline positions (6 rearward-facing and 6 forward-facing) for comfort on every trip.
Is the cover washable?
Yes. The cover is machine washable and can be removed without taking off the harness—very handy for daily life.
Where can I get expert advice for choosing the right setup?
At algateckids, we can help you confirm vehicle compatibility and the best configuration for your child’s age and height.
If you share your car (make/model/year) and your child’s height/age, we’ll guide you to the safest setup and confirm the required base.