Aftermarket Speed Limiters: 2026 Buyer’s Guide

Not every vehicle leaves the factory with the speed limiter your operation needs, and even those that do rarely offer the calibration, tracking, and support a fleet wants. That is where aftermarket speed limiters come in. This guide explains what an aftermarket speed limiter is, the six criteria that separate a good system from a poor one, and how AutoKontrol compares to the alternatives you may be weighing up, including Zemco.

What Is an Aftermarket Speed Limiter?

An aftermarket speed limiter is one fitted to a vehicle after it has been built, rather than installed on the production line by the manufacturer. It is also called a retrofit speed limiter.

Aftermarket systems are the norm in UK fleets for good reasons:

• They can be fitted to almost any make and model, old or new, so you standardise one system across a mixed fleet.
• They are calibrated to the exact limit your vehicle class requires, and recalibrated when the vehicle or the rules change.
• The better systems add capability the factory unit does not have, such as GPS tracking or geofenced speed zones.

If you are still deciding whether you need one at all, start with our guide to what a speed limiter is.

The 6 Things to Compare Before You Buy

Whichever supplier you look at, judge them against these six criteria. They are the factors that decide whether a speed limiter keeps you compliant and saves you money, or becomes a maintenance headache.

1. Type approval and certification

A speed limiter is only worth fitting if it is legally recognised. Look for EU/ECE R89 type approval and independent certification from bodies such as UTAC, TUV, and the UK’s VCA. Without approval, the device may not satisfy a DVSA inspection.

2. Electronic (DBW) or mechanical

Drive-By-Wire (DBW) electronic limiters intercept the throttle signal and are accurate to around +/- 1 km/h. Mechanical limiters restrict fuel and are less precise. For modern vehicles, DBW is almost always the better choice. Our guide on electronic vs mechanical speed limiters explains the trade-offs.

3. Tracking and telematics integration

A basic limiter caps speed and nothing else. If you also want to know where your vehicles are and how they are driven, choosing a limiter that includes GPS tracking saves you a second installation and a second supplier.

4. Installation network and lead times

A speed limiter is only as good as its fitting. Check whether the supplier has a nationwide network of approved installers who can come to your depot, and what the lead time is. A national network keeps vehicles on the road and downtime low.

5. Support, warranty, and recalibration

Vehicles change, rules change, and devices need periodic recalibration. Ask about warranty length, technical support, and how recalibration is handled across the life of the vehicle.

6. Total cost of ownership

Look past the unit price. Factor in installation, any subscription for tracking, recalibration, and the fuel and insurance savings the system delivers. The cheapest device is rarely the lowest total cost.

How AutoKontrol Compares to Zemco and Other Suppliers

Zemco is a long-established UK speed limiter brand, and it is one of the alternatives fleets consider alongside AutoKontrol. Rather than make claims about another company’s current products, the fair way to compare is to hold every supplier, including us, to the six criteria above and ask for their documentation.

Here is where AutoKontrol stands on each:

What to check	AutoKontrol
Type approval	EU/ECE R89 approved; UTAC, TUV, and VCA certified
Technology	We pioneered the Drive-By-Wire (DBW) limiter the industry now treats as standard
Tracking built in	Yes, via TrackSpeed, the only combined speed limiter and GPS tracker on the market
Geofenced zones	Yes, via GeoKontrol, for depots, school zones, and low-speed areas
Installation	Nationwide approved-installer network through SGH Connect
Track record	UK designed and built in Chorley since 1985, part of Scorpion Group Holdings

When you request quotes, ask each supplier to confirm their type approval, whether tracking is included, and the size of their installation network. Those three answers usually make the decision clear.

Where AutoKontrol Is Different: One Device, Two Jobs

The biggest practical difference between AutoKontrol and a limiter-only supplier is TrackSpeed. Most fleets that fit a speed limiter also want telematics. Buy them separately and you pay for two installations, run two systems, and reconcile two sets of data. TrackSpeed combines a compliant, type-approved speed limiter with live GPS tracking and driver-behaviour reporting in a single unit, developed with our sister brand ScorpionTrack Fleet.

For operations that need different limits in different places, GeoKontrol adds automatic geofenced speed control on top.

Making the Decision

If your priority is simply meeting the 56mph goods-vehicle rule, any type-approved DBW limiter fitted by an approved installer will do the job, and AutoKontrol’s System 80 is a proven choice. If you also want tracking, geofencing, and a single supplier backed by four decades of UK manufacturing, that is where AutoKontrol pulls ahead.

• Get a free quote and we will recommend the right system for your fleet
• View the full product range, including System 80, TrackSpeed, and GeoKontrol
• Call our technical team to compare options for your specific vehicles