Approved fitter · Immobiliser
Sterling Excel Transponder Immobiliser
Thatcham-approved transponder immobiliser that isolates two circuits when you park.
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Fitted at your home · Fixed quote before anything is booked
- Approved Scorpion fitter
- Manufacturer warranty
- No subscription
- Mobile fitting, West Midlands
01 · Overview
What it is.
A microprocessor immobiliser that works independently of the car's own system, isolating two electrical circuits once the ignition is off.
It arms itself after a period of inactivity and is disarmed by an anti-scan transponder tag, with a dash LED to show its state.
At a glance
- Thatcham
- Scorpion states Thatcham approved; no category given
- How you authorise
- Anti-scan transponder tag
- Immobilisation
- Isolates two electrical circuits
- Monitoring
- None
- Subscription
- None
- Manufacturer warranty
- 2 years (Scorpion)
- Price
- Fixed quote for your vehicle, fitted at your home. Nothing is booked until you agree.
Will the Sterling Excel Transponder Immobiliser fit your car?
Send the make, model and year. We'll check it against the manufacturer's list and come back with a fixed, fitted price.
02 · Compatibility
Will it fit?
Scorpion describes the Sterling Excel as working independently of the vehicle's own systems, isolating two electrical circuits whenever the ignition is off. It doesn't list vehicle types, so compatibility is checked by make and model before fitting.
Send us the make, model and year, or the registration, and we'll confirm it suits your vehicle before we quote.
- Vehicles
- Cars
- Works with
- Sterling Excel transponder tags; extra tags are sold separately by Scorpion
03 · Compare
How it stacks up.
| Feature | Sterling Excel Transponder Immobiliser | Scorpion X-Series ↗ | Pandora Storm ↗ |
|---|---|---|---|
| Thatcham | Scorpion states Thatcham approved; no category given | Not Thatcham-approved | Category 2 immobiliser (certificate TSC522, issued 17 October 2023) |
| How you authorise | Anti-scan transponder tag | Custom PIN on the car's own buttons, or a paired ScorpionTrack S5 driver tag | 128-bit Bluetooth tag, a secret code on the car's own buttons, or the app |
| Immobilisation | Isolates two electrical circuits | Arms automatically when the ignition goes off | At least two immobilisation points |
| Monitoring | None | None on its own; pairs with ScorpionTrack S5 | None: it doesn't track the car |
| App | Not stated | None | Pandora Connect |
| Subscription | None | None | None |
| Manufacturer warranty | 2 years (Scorpion) | 2 years (Scorpion) | Up to 3 years on the control unit, 12 months on tags, remotes and sensors (Pandora) |
| Vehicles | Not stated | Confirmed for your vehicle before fitting | Cars, vans and ATVs, on CAN bus, FD-CAN or older wiring |
Not sure it's the right one?
Tell us the car and what worries you — keyless theft, insurance wording, a van left on the street. We'll recommend a system and quote it fitted.
04 · On the day
What happens.
01
We check your vehicle
Make, model and year are checked against the system before we quote or book.
02
We come to you
At your home. All the equipment travels in the van.
03
Fitted out of sight
Hidden behind the trim, with no visible signs it's there.
04
Set up with you
We set your PIN or pair your tag, and show you service mode before we leave.
Before you enquire
Sterling Excel Transponder Immobiliser, answered.
01How does the Sterling Excel work?
Once the ignition is off it isolates two electrical circuits, independently of the car's own system. It arms itself after a period of inactivity, and an LED on the dash shows its state.
02How do I disarm it?
With its anti-scan transponder tag. Extra tags are sold separately by Scorpion.
03Is it Thatcham approved?
Scorpion states it is Thatcham approved, though it doesn't give a category.
04Is there a subscription?
No. It's a standalone immobiliser with nothing to renew.
Related
More from Scorpion.
Immobiliser
Scorpion X-Series
Hidden CAN-bus immobiliser that arms itself every time you switch off.
View Scorpion X-Series
Immobiliser
Scorpion X2 Spirit
Scorpion's next-generation immobiliser, with a Bluetooth tag and a customer app.
View Scorpion X2 Spirit
Thatcham S5Tracker
ScorpionTrack S5-VTS
Thatcham S5 tracker with driver-recognition tags and 24/7 monitoring.
View ScorpionTrack S5-VTSRead before you choose
19 September 2026Keyless car theft, and how an immobiliser stops itHow relay attacks, key programming through the OBD port and CAN injection work, and what a CAN-bus immobiliser adds to stop each one.
19 September 2026Pandora Microbot vs CAN-Phantom vs Scorpion X-SeriesThree CAN-bus immobilisers compared: how you authorise each, Thatcham status, subscriptions, warranty, and which suits which driver.- 24 September 2026Audi Q5 CAN-Bus Immobiliser Fitting in Sutton ColdfieldProtecting a keyless Audi Q5 in Sutton Coldfield: the CAN-bus immobilisers we fit, and where Meta Trak's Deadlock E-TEC suits push-to-start Audis.
Fitted at your door in
Check Sterling Excel Transponder Immobiliser fits
Tell us about the car.
Send the basics. We will check compatibility and contact you by your preferred method—no open calendar and no obligation.