Ranked #224 car in the UK · Convertible · 7 units sold last year
The Porsche 718 Boxster (2018 on) is the Cayman's drop-top twin - the same superb mid-engined chassis with the roof down. Turbo flat-fours do the heavy lifting, with the flat-six GTS 4.0 and Spyder at the top for the purists. It's a genuine sports car rather than a soft cruiser: sharp, fast and beautifully balanced, and one of the best-handling convertibles you can buy at any sensible price.
combined
The short version
Forecourt score
Value 70 · Reliability 60 · Insurance 1
The Porsche 718 Boxster holds its value well and is dearer to run than most. Its MOT-based reliability is good, 76 out of 100, ahead of 60% of the cars we track. On three-year value retention it ranks better than 70% of models.
The Forecourt score blends how this car ranks against the catalogue on value retention, reliability and insurance cost (weighted 40/40/20). Higher is better; running cost is not yet folded in.
Estimates are tuned to the version you choose.
Fuel
Petrol · 1988cc
Power
300 ps
Drivetrain
RWD
Cam drive
Chain
Quoted MPG
34 mpg
The volume Boxster - 2.0 flat-four turbo, 300 PS, manual or PDK. Polarising sound vs the flat-six, but quick and economical. Chain-driven.
Tidy and well looked-after for its age — the typical car.
Remembered as you browse other cars.
Optional — fills in the exact year and ULEZ status for your specific car. The registration isn’t stored.
Estimated market value
How we got this number — click for the breakdown, or to challenge it.£37,450
Range £31,050 – £44,400
medium confidence
Fair value — depreciation is moderating.
At 16,269 miles it’s about the ~20,161 typical for a 3-year-old.
Seen one for sale?
A data-led guide from the depreciation curve, UK parc trend and reliability — not financial advice.
How a 2023-registration Porsche 718 Boxster loses value over time.
Based on the 2023 car with 16,269 miles you entered above — worth about £37,450 today — here is the cost of owning it for the next 5 years, at roughly 5,423 miles a year.
5-year total
£23,680
Per year
£4,736
All-in per mile
£0.87
Fuel per mile
23.2p
Best age to buy — around 7 years
A 7-year-old example loses roughly £3,050 a year — under half the £7,200 a one-year-old sheds. The steepest drop is behind it.
Uses current UK pump and home-charging prices (DESNZ weekly), typical-driver insurance and manufacturer service intervals. "Fuel per mile" is just the energy input — so an EV at ~9p and a diesel at ~22p make running-cost comparison direct. A guide; your own costs will vary.
Where this car ranks against the 340 vehicles in our index — higher is better.
Percentile rank across our full index. A measure is shown only where the data spreads meaningfully across the index.
How the available versions compare on price, running cost, and the headaches each tends to develop.
The default choice: lowest purchase price and easy upkeep, at the cost of higher fuel bills than a hybrid.
Watch for
Makes sense for high motorway mileage; less so for short urban hops, where the DPF struggles.
Watch for
Fuel/energy costs based on this week’s UK averages (w/c 22/06/2026) · Petrol 153.3p/L, Diesel 172.5p/L, Electricity 27.0p/kWh · DESNZ
Group 48 of 50 (very high — top of the scale) · Comprehensive · 3 years NCB
Indicative annual comprehensive premiums for this car, by driver age band and risk profile. Pick the combination closest to your circumstances.
Estimated annual premium · typical, age 33-39
£2,008/ year
Roughly £167 per month
Typical
Average UK driver — 3 years NCB, average postcode, no recent claims.| Age band | Lower risk | Typical | Higher risk |
|---|---|---|---|
| Age 17-25 | £4,578 | £5,723 | £7,440 |
| Age 26-32 | £2,390 | £2,811 | £3,430 |
| Age 33-39Selected | £1,767 | £2,008 | £2,369 |
| Age 40-49 | £1,500 | £1,667 | £1,933 |
| Age 50+ | £1,337 | £1,486 | £1,753 |
How we estimate this
Indicative annual comprehensive premium estimates. The 'Typical' figure represents an average UK driver in each age band; Lower and Higher risk show the realistic spread driven by factors UK insurers legitimately price on (postcode, occupation, claims history, NCB, voluntary excess, modifications). Based on 10,000 miles/yr, £250 voluntary excess, and the no-claims bonus selected above. Always get individual quotes before buying.
Adjust the annual mileage to match how you'll actually use the car. Insurance is what you selected above (age 33-39, typical risk, 3 yrs NCB).
Routine service
£290
Annual main-dealer service
Major service
£280
Every 2 years, annualised
Road tax
£195
Standard rate, post year-one
Fuel
£1,080
30 mpg, £1.49/L
Insurance
£2,008
Age 33-39, group 52
Clean-air zones
⚠ Depends on variantBased on London ULEZ standards — Birmingham, Bath, Bristol, Sheffield, Glasgow and other UK clean-air zones generally follow the same rules.
Excludes depreciation and unscheduled repairs (see next section).
What out-of-warranty repairs typically run, by mileage band. Your selected mileage is highlighted.
0-30k miles
£120
per year · low risk
30-60k miles
£360
per year · low risk
60-100k miles
£780
per year · medium risk
100k+ miles
£1,350
per year · high risk
235/40 R18 · 245/35 R19
What a full set of four will cost you (including fit and balance), and which brand each tier of buyer should pick. A typical set lasts about 15,000 miles.
Budget
£400
set of 4, fitted · £85 per tyre
Mid-range
£580
set of 4, fitted · £130 per tyre
Premium
£840
set of 4, fitted · £195 per tyre
Factory options ranked by how much of their original cost they recover at resale. Anything above 70% return tends to make money back; below 40% is paying for your own enjoyment.
| Option | New cost | Added used value | Return |
|---|---|---|---|
Tow bar (factory-fit) Niche, but the buyers who want one will pay for it. | £650 | £450 | 69% |
Parking sensors & reversing camera Near-expected now — its absence costs more than its presence returns. | £500 | £300 | 60% |
Heated seats / cold-weather pack | £450 | £200 | 44% |
Adaptive / matrix LED headlights | £900 | £400 | 44% |
Metallic or premium paint Almost universal — an unusual colour is the bigger resale risk. | £600 | £200 | 33% |
Panoramic / opening roof | £1,100 | £350 | 32% |
Advanced driver-assistance pack | £1,500 | £450 | 30% |
Larger alloy wheels | £700 | £200 | 29% |
Premium sound system | £800 | £200 | 25% |
Drawn from owner reports and warranty data. Filtered for relevance to 16,269 miles.
Watch now
Failure typically happens around your current mileage.
Upcoming
A known weak point — but you haven't reached its usual mileage yet.
Already due
Past its usual failure mileage. Either already fixed, or about to.
Recorded in 8.6% of MOT tests over 100k miles — from 725,475 DVSA MOT tests analysed.
Recorded in 7.3% of MOT tests over 100k miles — from 725,475 DVSA MOT tests analysed.
Recorded in 7.6% of MOT tests over 100k miles — from 725,475 DVSA MOT tests analysed.
Recorded in 4.9% of MOT tests over 100k miles — from 725,475 DVSA MOT tests analysed.
Recorded in 7.0% of MOT tests over 100k miles — from 725,475 DVSA MOT tests analysed.
Recorded in 2.9% of MOT tests over 100k miles — from 725,475 DVSA MOT tests analysed.
"Parts low/medium/high" indicates how easy the replacement part is to source — discontinued or specialist parts mean longer workshop time and bigger bills.
How this model fares at its MOT as it ages — from 743,431 real DVSA test records.
MOT pass rate by age
A 3-year-old 718 Boxster passes its MOT 91% of the time; by 25 years that has slipped to 77.3%. The y-axis is zoomed to this model’s range so the trend is readable.
Longevity
From 55 vehicles registered in 1996.
Survival by registration year
Each point is one registration cohort. Older cars on the left, newer on the right. A flatter line means the model holds up over time; a steep drop means cohorts disappear from UK roads faster.
What’s on the road
The fuel-type split of every 718 Boxster currently MOT’d in the UK. From 48,118 vehicles.
Common MOT failures by mileage
The defect categories this 718 Boxster fails on most often, and how the failure rate climbs as the miles add up — from the same DVSA test records.
| Category | 0-30k | 30-60k | 60-100k | 100k+ |
|---|---|---|---|---|
| Suspension | 1% | 2% | 5% | 9% |
| Brakes | 1% | 3% | 5% | 7% |
| Lighting & signalling | 1% | 2% | 5% | 8% |
| Tyres & wheels | 3% | 4% | 4% | 5% |
| Emissions | — | 1% | 4% | 7% |
| Driver's view | — | 1% | 2% | 3% |
Share of MOT tests in each mileage band with at least one defect in that category. The peak band for each is highlighted.
Typical mileage by age
The average odometer reading for a 718 Boxster at MOT, by age — measured from the same DVSA records, not assumed. A useful yardstick for whether a given car has done more or fewer miles than its age suggests.
Mean recorded mileage at MOT by vehicle age, from DVSA test records (ages with at least 10 tests shown).
Good
Composite of MOT pass rate, defect prevalence and cohort survival from 725,475 tests — high confidence.
MOT outlook · age 5 years
79th percentile — Better than most comparable cars
Based on 40,257 MOT tests · ranked against 248 catalogue models with comparable data
Where this car sits in the catalogue
Pass-rate distribution across 248 catalogue models
Safety recalls
Manufacturers occasionally issue safety recalls to fix a fault free of charge. You can check whether the Porsche 718 Boxster, or your exact vehicle, has any outstanding recalls on the official DVSA service.
Check on GOV.UKOpens the Driver & Vehicle Standards Agency recall checker. Choose the make, model and year of manufacture — no registration needed.
A general indicator from UK 2025 theft data and this car’s characteristics — not a prediction for any one vehicle.
Whole-car theft
Higher
Higher-value cars like this are relay-theft targets — keyless entry can be exploited from the driveway in under a minute.
Parts theft
Around average
Parts-theft risk is around average — catalytic-converter theft is the main thing to be aware of on any petrol or diesel car.
Worth doing
Whether driving a Porsche 718 Boxster into a UK clean-air zone will cost you anything. Rules use the same Euro standard across most zones — petrol from 2006 and diesel from 2015 onwards are exempt; pure electric is always exempt.
| City | Area | Daily charge | Likely outcome |
|---|---|---|---|
| London | All of Greater London (within the M25) | £12.50 | Likely exempt Petrol from 2006 meets Euro 4. |
| Birmingham | Inside the A4540 Middleway | £8.00 | Likely exempt Petrol from 2006 meets Euro 4. |
| Bristol | City centre and part of the Portway | £9.00 | Likely exempt Petrol from 2006 meets Euro 4. |
| Glasgow | City centre | — | Likely exempt Petrol from 2006 meets Euro 4. |
| Edinburgh | City centre | — | Likely exempt Petrol from 2006 meets Euro 4. |
| Aberdeen | City centre | — | Likely exempt Petrol from 2006 meets Euro 4. |
| Dundee | City centre | — | Likely exempt Petrol from 2006 meets Euro 4. |
Model-level guidance only. To check a specific registration, use the official gov.uk clean-air zone checker. Zone charges and boundaries are set by local councils and change over time.
How well-supported Porsche is across the UK — a practical read on how easy servicing, parts and warranty work will be to find.
Franchised UK dealers
~45
Limited network
Performance premium
Network size relative to the UK's largest (Porsche is 1% of all franchised outlets)
A limited network — you may need to travel for main-dealer servicing, though independent specialists can often help.
For context, the UK has roughly 4,500 franchised car-dealer outlets in total, plus about 15,500 independent garages.
Approximate figures, curated from public UK industry sources (NFDA, Car Dealer Magazine). Franchised networks shrink year on year — these indicate network size, not an exact count.
Length
4,400 mm
Width
1,850 mm
Height
1,300 mm
Kerb weight
1,500 kg
Boot
280–320 L
Fuel tank
48 L
Of every Porsche 718 Boxster ever registered in the UK, this is what's actively on the road, parked off the road on a SORN, or gone for good.
Total ever registered
34,821
Currently taxed & on road
21,699
62% of all registered
SORN (off road)
10,877
31% of all registered
Scrapped or exported
2,245
UK fleet trend — 2014 to 2025
-1.9% vs 2024Source: DfT VEH0124 vehicle licensing statistics (year-end 2025) · Updated 1 Jul 2026
Common questions
Same underpinnings
Mid-engine sports-car platform shared between 718 Boxster and 718 Cayman. Different badges, often substantially different residuals, but broadly the same mechanicals and repair cost profile.
Porsche 982 platform · Porsche
Common questions
Answers are generated from this car's Forecourt data — DVSA MOT records, DfT licensing statistics and our valuation model — and update with the weekly data refresh.