How Old Is A 66 Plate Car: Complete Guide & Key Details

You know, I was chatting with my neighbour, Brenda, the other day. She’s a lovely lady, but bless her heart, she gets a bit flustered by all this modern car registration stuff. She was looking at a used car advert and saw something about a “66 plate” and her eyes just glazed over. “Darling,” she said, clutching her pearls (yes, Brenda still wears pearls), “is that… like… old?” It got me thinking. How do people figure out the age of a car based on those seemingly random numbers and letters on the plate? It's not as simple as just remembering your own car’s age, is it? It's like a secret code, and Brenda – and probably a good few of you reading this – are wondering what on earth it all means.
So, let’s crack this code together. We’re going to dive deep into the world of UK car registrations, specifically focusing on that mysterious “66 plate.” Forget dusty encyclopedias; this is going to be your friendly, no-nonsense guide to understanding how old a 66 plate car really is, and what other juicy details you can glean from those little metal rectangles.
Unpacking the Mystery: What Exactly is a "66 Plate" Car?
Alright, let’s cut to the chase. Brenda wasn't entirely wrong to think it might be old. But compared to what? In the UK, car registrations follow a pretty straightforward, albeit sometimes confusing, system. It's all about the age identifier, and that’s where the magic (or confusion) happens.
The registration plate itself is a bit like a car’s birth certificate. It tells you when it was first registered. And that "66" bit? It's not a model number, or a secret agent code, it's a direct indicator of when that car rolled off the production line and onto the road for the very first time.
The Anatomy of a UK Registration Plate
Before we get super specific about the 66 plate, let’s just quickly break down what you’re usually looking at on a standard UK plate. You’ll typically see something like: AB12 CDE.
- The First Two Letters: These are the local memory tags. They tell you where the vehicle was first registered. For example, ‘AB’ might be linked to a specific registration office. It’s like the car’s hometown address, but for its registration. Handy, right?
- The Two Numbers (The Age Identifier): THIS is the crucial part for Brenda’s question. These two numbers change every six months and tell you the age of the car. It’s the key to unlocking its birthdate.
- The Last Three Letters: These are random and are generated sequentially by the DVLA (Driver and Vehicle Licensing Agency). They help ensure that every car has a unique registration number. So, don't try to find a hidden meaning in those last three; they’re just there to make sure your car isn’t twins with your neighbour’s.
See? Not so scary when you break it down. It's a bit like decoding a simple password.
So, How Old IS a 66 Plate Car? The Big Reveal!
Okay, drumroll please… A car with a 66 plate was first registered between 1st September 2016 and 29th February 2017.

There you have it! Brenda, if you’re still reading this, you can relax. It's not ancient history! It's also not brand spanking new, but it’s certainly not a classic (yet!).
Now, you might be thinking, “Why two different date ranges within a single number?” This is where the six-month age identifier system comes into play. The DVLA updates the age identifier twice a year to help distinguish between older and newer vehicles more effectively.
The Bi-Annual Registration Magic
Let’s break down how these numbers work, because this is the part that can trip people up:
- March to August: The age identifier is the last two digits of the year. So, a car registered between 1st March 2016 and 31st August 2016 would have a plate ending in 16.
- September to February: This is where the 66 plate comes in. For cars registered between 1st September 2016 and 29th February 2017, the age identifier is the last two digits of the year PLUS 50. So, 16 + 50 = 66.
It's a clever system, in a way. It allows them to have a consistent pattern for the entire year, and then just add that little bit of extra information for the second half of the year. Think of it like adding a special stamp for the autumn/winter babies.

So, if you see a car with a 66 plate, you know it’s not just any old 2016 car; it’s specifically from that latter half of the 2016-2017 registration year.
Why Does This Matter? The Practical Implications
Understanding the age identifier is more than just a pub quiz fact (though it’s a good one!). It has some very real-world implications, especially when you’re:
- Buying a Used Car: This is probably the most common reason people get stuck on registration plates. Knowing the age helps you assess the car’s value, its likely condition, and potential future maintenance needs. A car with a 66 plate will generally be newer than a car with a 16 plate, even if both are technically from the same year. This can affect pricing significantly. You don't want to overpay for a car that's actually a few months older than you thought!
- Selling Your Car: Similarly, knowing the exact registration period helps you price your car accurately and explain its age to potential buyers.
- Understanding Depreciation: Cars lose value over time, and the rate of depreciation is often tied to age. A 66 plate car will have depreciated differently than a 16 plate car.
- Insurance Premiums: Insurers often take the age of the vehicle into account when calculating premiums. Newer cars can sometimes be more expensive to insure, but this isn’t always the case.
- Road Tax (Vehicle Excise Duty - VED): While VED is now largely based on CO2 emissions for newer cars, the age of the vehicle can still play a role in older tax bands.
It’s essentially a shortcut to understanding a car’s relative age and, by extension, its potential market value and condition. Pretty neat, huh?
Is a 66 Plate Car “Old”? Let’s Be Real.
So, to answer Brenda’s initial question definitively: No, a 66 plate car is not "old" in the general sense of the word.

In the grand scheme of things, it's a relatively modern vehicle. We’re talking about a car that’s around 7-8 years old as of 2024. It's likely to be a solid, reliable car with most of the modern features you’d expect. It’s not a vintage car, nor is it a brand-new model.
Think about it this way: when Brenda was younger, cars from the late 1990s might have felt "old" to her. But now, a car from the late 1990s is definitely in the classic or definitely "old" category. The perception of "old" changes with time, doesn't it? A 66 plate is firmly in the "used but not ancient" bracket.
It's more about its place in the market. It’s no longer the latest model, but it’s still got plenty of life and modern appeal. It's the kind of car you might find as a great value option when looking for a reliable family car or a sensible commuter.
Beyond the 66 Plate: What Other Identifiers Are There?
Just for your general knowledge, and to make you the undisputed expert at your next car-related gathering, here’s a quick peek at other age identifiers:

- 17 Plate: 1st March 2017 - 31st August 2017
- 67 Plate: 1st September 2017 - 28th February 2018 (17 + 50)
- 18 Plate: 1st March 2018 - 31st August 2018
- 68 Plate: 1st September 2018 - 28th February 2019 (18 + 50)
- 19 Plate: 1st March 2019 - 31st August 2019
- 69 Plate: 1st September 2019 - 29th February 2020 (19 + 50)
- 20 Plate: 1st March 2020 - 31st August 2020
- 70 Plate: 1st September 2020 - 28th February 2021 (20 + 50)
- 21 Plate: 1st March 2021 - 31st August 2021
- 71 Plate: 1st September 2021 - 28th February 2022 (21 + 50)
- 22 Plate: 1st March 2022 - 31st August 2022
- 72 Plate: 1st September 2022 - 28th February 2023 (22 + 50)
- 23 Plate: 1st March 2023 - 31st August 2023
- 73 Plate: 1st September 2023 - 29th February 2024 (23 + 50)
- 24 Plate: 1st March 2024 - 31st August 2024
- 74 Plate: 1st September 2024 - 28th February 2025 (24 + 50)
See how that "+ 50" rule consistently applies for the September-to-February registrations? It's a pattern you can definitely get your head around. So, when you see a 74 plate, you know it’s from September 2024 to February 2025. It's a way to distinguish between cars that are roughly 6 months apart in age, even though they fall into the same calendar year.
Final Thoughts: Decoding the Plate Like a Pro
So there you have it. The mystery of the 66 plate car is solved. It's a car registered between September 2016 and February 2017. It’s not ancient, but it’s also not fresh off the showroom floor. It sits comfortably in the used car market, often offering a great balance of price and modernity.
Next time you’re looking at a car advert, or even just glancing at the cars around you, you’ll be able to instantly gauge their approximate age. You'll be the one in the know, nodding sagely as others scratch their heads. Brenda will be forever grateful, and you’ll have a new trick up your sleeve.
It's a little piece of UK motoring trivia that's actually incredibly useful. And who doesn't love feeling like they've cracked a code? Happy motoring, and may your plates always be decipherable!
