Thank you for using our calculator tool. This article examines the real-world cost of ownership and common problems for the MAZDA MX-5 II (NB) 2004 with the 1.6 16V (NB6C) engine in the United Kingdom at 100000 miles.
ESTIMATED MARKET PRICE
In the UK, a 2004 Mazda MX-5 NB 1.6 typically costs between £1500 and £4500 depending on condition. Fair condition examples sell for £1800-£2500, good condition £2800-£3500, while excellent or low-mileage cars reach £4000-£5000.
DEPRECIATION — PAST YEAR
Over the past year the model has lost approximately £300-£500 in value, equating to a 10-15% depreciation on typical examples.
DEPRECIATION FORECAST
- 1 year: £200-£400 (resale £1600-£4100)
- 3 years: £600-£1200 (resale £900-£3300)
- 5 years: £900-£1800 (resale £600-£2700)
BREAKDOWN FREQUENCY & REPAIR COSTS
The MX-5 NB is generally reliable but age-related issues increase at 100k miles. Average repair bills range from £150 to £600 per visit.
ENGINE RELIABILITY & REPAIR COSTS
The 1.6 16V (NB6C) engine scores high reliability. Common issues include VVT rattle, oil leaks from the rocker cover and water pump failure. At 100000 miles expect £250-£450 for water pump and timing belt service, £120 for rocker cover gasket.
TRANSMISSION & GEARBOX RELIABILITY
The 5-speed manual gearbox is robust. Occasional synchro wear on 2nd/3rd gear appears after 90000 miles. Rebuild costs £800-£1200.
ELECTRICAL SYSTEM & MULTIMEDIA RELIABILITY
Electrics are simple and reliable. Window regulator failures and alternator issues occur occasionally. Repairs average £150-£350.
SUSPENSION & CHASSIS RELIABILITY
Suspension components wear at higher mileage. Common replacements include wishbone bushes (£180), shock absorbers (£400 per axle) and ARB drop links (£80).
BODY & EXTERIOR
Rust protection is average; check sills, rear arches and boot floor. New bumpers cost £200-£400, wings £150-£300, glass £100-£250 in the UK.
SCHEDULED MAINTENANCE COSTS
At 100000 miles, oil and filter service £80-£120, spark plugs £60, brake pads £120 per axle, timing belt kit £250-£350.
TAXES, REGISTRATION & INSURANCE
Road tax is £180-£210 per year. Average insurance for a 40-year-old driver is £250-£400 annually.
FUEL / ENERGY COSTS
Real-world consumption is 7.5-8.5 L/100km. Monthly fuel cost £90-£120, annual £1100-£1400 at current UK prices.
TYRES
Factory size 185/60R14. OEM tyres £70-£95 each, quality alternatives £50-£70 each.
FILTERS & CONSUMABLES
Cabin filter £15-£25, oil filter £8-£12, air filter £12-£20.
TOTAL ANNUAL OWNERSHIP COST
- Fuel: £1200
- Insurance: £350
- Tax: £200
- Maintenance: £400
- Tyres & repairs: £300
- Total: approx £2450
PROS & CONS
- Pros: Fun to drive, reliable engine, low parts cost, strong community support
- Cons: Rust issues, limited practicality, higher insurance for younger drivers
WHAT TO CHECK BEFORE BUYING
Inspect for rust on sills and boot floor, check service history for timing belt, test for VVT noise, verify gearbox synchros and examine soft-top condition.
VERDICT
The 2004 MX-5 NB 1.6 offers excellent value and reliability for the price. It is recommended for enthusiasts seeking affordable fun, provided rust and maintenance history are verified.
