MX-5 NB (1998–2005) · UK value guide · updated 2026

What's a fair price for a Mazda MX-5 NB?

Q: How much is a Mazda MX-5 NB worth in 2026?

Roughly 1,500 pounds for a project, around 2,800 for a usable car, about 5,000 for a clean example and 8,000 or more for a minter. Spec, a sound shell and history move a car within those bands.

Q: Is a Mazda MX-5 NB a good investment?

Buy it to enjoy rather than as a pension, but a sound, sensibly priced NB is one of the few cheap sports cars where careful buyers tend to get most or all of their money back. The risk is rust, not depreciation.

"It feels a bit much" is not a negotiating position. The fair price for an NB isn't a single number — it's a clean-car baseline for the exact spec, minus the cost of everything that car needs doing. This guide gives you the 2026 UK baselines by condition, the factors that move them, and a surveyor's method for turning a specific car into a defensible offer and a walk-away figure.

Mazda MX-5 NB being valued — Value an NB from a clean baseline, then deduct what it needs. Never the other way round.

The short answer: NB prices by condition (2026 UK)

Benchmarks for a 1.8 at around 90,000 miles. A 1.6 sits a little below; a genuine hardtop, a tidy Sport, or a numbered limited edition sits above. Treat these as your anchor, then adjust:

Condition	What it means	Ballpark
Project	Needs work to be reliable or road-legal; likely rust or overdue jobs	~£1,500
Usable	Drivable daily but with deferred maintenance and cosmetic wear	~£2,800
Clean	Well kept, sound shell, only minor jobs due	~£5,000
Minter	Exceptional, sorted, low owners, full history	~£8,000+

What moves an NB's value

Rust — the big one. A sound shell can be worth thousands more than a rotten one with the same MOT. See our rust spots guide; it's the single biggest swing in price.
Spec. The Mk2.5 1.8 Sport (6-speed, Bilsteins, limited-slip diff) commands a premium. So does a genuine factory hardtop and any numbered limited edition.
History. A thick folder of receipts — especially a recent cambelt — adds real money and removes risk. No history is a discount.
Mileage. Matters less than condition on these. A cared-for 120k car beats a neglected 50k one every time.
Engine. The 1.8 is worth more than the 1.6; see 1.6 vs 1.8.

Are they going up?

Clean, unmolested NBs are appreciating, while rough ones get broken for parts because repairs cost more than the car is worth. That's shrinking the supply of good cars and pulling their values up. Buy a sound one well and your money largely survives.

The surveyor's method: build the offer from the baseline down

This is exactly how a cost professional values anything. Don't start from the asking price and haggle down — start from what a clean example of that spec is worth, then subtract the cost of every job the car in front of you needs:

Set the baseline. Pick the clean-condition figure for the right engine and spec.
List the faults and price each one (rust, cambelt, clutch, tyres, MOT advisories).
Subtract. Baseline minus the total of those costs = your fair price.
Set a walk-away. Add a margin for the unknowns; above that number, you walk.

Example: a Clean 1.8 baseline of £5,000, but it needs a cambelt (£350), two tyres (£180) and has bubbling arches you'll want done (£500) = a fair offer nearer £3,970, not the £4,800 on the windscreen.

Let the calculator do the sums

Our MX-5 NB calculator runs this exact method for you: enter the car's price, mileage, condition, rust and history and it returns a fair price, a walk-away figure, and the true cost of ownership.

Frequently asked questions

How much is a Mazda MX-5 NB worth in 2026?

Roughly £1,500 for a project, around £2,800 for a usable car, about £5,000 for a clean example and £8,000+ for a minter. Spec, a sound shell and history move a car within those bands.

Are MX-5 NBs going up in value?

Good ones are. The supply of rust-free, original cars is shrinking as rough examples are scrapped, which supports and slowly lifts prices for the best cars.

What counts as high mileage for an NB?

These engines routinely pass 150,000 miles with servicing, so mileage matters far less than condition and history. A well-maintained high-miler is a better buy than a neglected low-miler.

Is a Mazda MX-5 NB a good investment?

Buy it to enjoy, not as a pension — but a sound, sensibly-priced NB is one of the few cheap sports cars where careful buyers tend to get most or all of their money back. The risk is rust, not depreciation.

Before you offer

Inspect it properly: take the free 40-point inspection checklist to the viewing.
Price it from evidence: run the numbers in the calculator and read the full buyer's guide.
Negotiate with the receipts: the Buyer's Pack gives you fault-cost references and word-for-word scripts to bring the price down from the faults you found.