Mazda MX-5 problems, reliability and years to avoid
If you are considering buying a used Mazda MX-5, these are the common problems worth knowing about first. Our garage database tracks 7 known faults for this model, 2 of them rated high severity. Every one below is a repair bill a seller has good reason not to mention.
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Is the Mazda MX-5 reliable?
The Mazda MX-5 has 7 known faults in our database across 3 generations, 2 of them rated high severity. The most serious are bodywork (the Mk2 rusts through its sills and rear wheel arches as badly as the Mk1 did) and gearbox (the limited slip differential fitted to the sportier versions can break up internally). None of them makes the car a bad buy on its own; the risk is a seller who knows and says nothing.
That is a count of the faults we hold, not a reliability score. Popular cars get written about more, and a newer generation has had less time to show its faults.
Which Mazda MX-5 years should you avoid?
No year is a write-off on its own. What matters is which serious faults a given year and engine can have, and whether the car in front of you has had them fixed.
Mk2 NB, 1998 to 20051 high severity
1 known fault, the serious ones in the bodywork
Mk3 NC, 2005 to 20151 high severity
4 known faults, the serious ones in the gearbox
Mk4 ND, 2015 to 2024
2 known faults, none rated high severity
Years and engines with a serious known fault
1998 to 2005, All (1.6 and 1.8 petrol): the Mk2 rusts through its sills and rear wheel arches as badly as the Mk1 did
1998 to 2015, Cars with the limited slip differential: NB 1.8 Sport versions and NC 2.0i Sport and Sport Tech (not the 1.6 NB or the 1.8 NC): the limited slip differential fitted to the sportier versions can break up
Each one is set out in full below, with the symptoms, the typical mileage and a rough repair cost.
Generation 1 of 31 known fault · 1 owner report · 9 good notes
Mazda MX-5 Mk2 NB (1998 to 2005) problems
Bodywork/ChassisHigh severity💬 4 owner reports, 2012 to 2016
The Mk2 rusts through its sills and rear wheel arches as badly as the Mk1 did: two 2003 cars had rusted-through sills by 2014, and a dealer-serviced 2003 car had rust perforation through both rear arches and sills with a £1,400 repair estimate in 2016. From the spring 2001 facelift the deformable front crossmember is laminated in a way that makes it a rust trap, and it can suffer dangerous structural corrosion; it needs careful checking because replacing it is a difficult and expensive job. The archive's own advice is to check the rear arches and wings very carefully.
Rough guide
£800-2500
Typical symptoms
bubbling or holes in the sills behind the front wheels and ahead of the rear arches
rust along the rear wheel arch lips
flaking or soft metal on the front crossmember under the radiator
MOT advisories for corrosion
Affected vehicles
Engines:
All (1.6 and 1.8 petrol)
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What owners report on the Mk2 NB
1 single report, unconfirmed
One owner each, in their own words rewritten as a line, and not counted in our risk scoring. A fault joins the list above once a second report or an editorial source backs it.
Gearbox and clutch · September 2012Limited slip differentials in some MX5s appear to be failing, with internal components breaking up and requiring expensive replacement.
What owners like about the Mk2 NB
9 notes
The car achieved a good four-star rating for crash safety, scoring 74% in the 2002 NCAP tests.
The MX5 ranked 8th from the top for reliability in the 2002 Auto Express survey.
This model achieved 17th place out of 144 vehicles in a 2002 customer satisfaction poll for V and W registered cars.
Even in 2002, the 1.8 Sport with a 6-speed gearbox was considered the definitive small, reliable sports car.
The MX5 topped the 2002 'Which?' reliability survey for cars from 2000 to 2002, and ranked 5th for 1997 to 1999 models.
Mazda generally had the fourth lowest average warranty repair costs in the 2003 Warranty Direct Reliability index.
The car was rated 6th out of 137 vehicles in the 2003 Top Gear survey.
Mazda was the third top marque in the 2004 J.D. Power Customer Satisfaction Survey.
Mazda topped the Reliability Index again in 2004, combining low average repair costs of £244.41 with few failures.
The limited slip differential fitted to the sportier versions can break up internally. On the Mk2 the archive noted the diffs breaking up, with a new unit costing over £2,000, and advised draining the oil and removing any broken pieces before they are churned round; on the Mk3 a 2009 2.0 Sport Tech's diff failed at just over three years old and 25,000 miles, a £3,000 repair.
Rough guide
£1000-3000
Typical symptoms
whine from the rear that rises with road speed
clunk or grinding from the back on and off the throttle or on tight turns
metal fragments in the differential oil
Affected vehicles
Engines:
Cars with the limited slip differential: NB 1.8 Sport versions and NC 2.0i Sport and Sport Tech (not the 1.6 NB or the 1.8 NC)
Typical mileage:
25000-80000 miles
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Engine/EmissionsMedium severity💬 2 owner reports, 2011 to 2012
On the 2.0i the variable valve timing gear and the timing chain can fail early: one owner's went at four years old and 54,000 miles despite frequent oil changes, a £1,000 job, and a second 2.0i case was reported within months.
Rough guide
£800-1200
Typical symptoms
rattle from the front of the engine, loudest in the first seconds after a cold start
engine warning light with a camshaft timing fault code
rough or hesitant running if the timing has slipped
Affected vehicles
Engines:
2.0i MZR petrol (not the 1.8)
Typical mileage:
50000+ miles
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Bodywork/ChassisMedium severity💬 3 owner reports, 2011 to 2014
On the Roadster Coupe a rubber drain pipe runs from a drain hole in the seal between the powered roof and the panel that lifts to let it stow, but it stops well short of the drain in the boot floor; parked facing up a slope, the water misses the drain and leaks into the load area, eventually causing corrosion. Roof motors have also started failing, which the archive linked to the same leak, with Mazda dealers quoting £2,700 to fix them on a 39,000-mile 2008 car.
Rough guide
£100-2700
Typical symptoms
water in the load area behind the seats, worst after parking on a slope
roof slow, straining or stopping part way
rust on the boot floor
Affected vehicles
Engines:
Roadster Coupe (powered folding hard top) only
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Transmission/ClutchMedium severity📝 Editorial
The six-speed manual gearbox is liable to pop out of third or fourth into neutral, again and again, when the car is first driven on a cold morning. A new baulk ring cures it.
Typical symptoms
gear lever jumping back to neutral from third or fourth
problem worst when the gearbox is cold
Affected vehicles
Engines:
six-speed manual gearbox
Typical mileage:
unknown miles
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What owners report on the Mk3 NC
17 single reports, unconfirmed
One owner each, in their own words rewritten as a line, and not counted in our risk scoring. A fault joins the list above once a second report or an editorial source backs it.
Bodywork · February 2020A windscreen replacement can lead to leaks into the footwells if scuttle cover bolts are not sealed, allowing rainwater to enter the cabin.
Bodywork · January 2020Screenwasher jets became detached and went missing from a 2011 Mazda MX-5 Roadster Coupe.
Suspension and steering · August 2019A 2008 Mazda MX-5 with 68,000 miles developed a clunking noise from the rear when cornering, possibly due to CV joints.
Engine · May 2019A 2005 MX-5 2.0i engine developed a tapping or rattling noise between 2,500 and 4,000 revolutions per minute.
Brakes · June 2018A 2011 Mazda MX-5 developed a grating sound from the rear offside wheel area when slowing down and applying the brakes.
Bodywork · May 2018Paint was peeling on a 2010 Mazda MX-5 Roadster Coupe, specifically between the rear window and the boot lid.
Suspension and steering · November 2017A Mazda MX-5 Mk III failed its MoT due to broken front springs, which were replaced with incorrect, longer springs.
Bodywork · June 2017A 2011 Mazda MX-5 Roadster Coupe developed a rattle from its roof mechanism at 12,000 miles, which was resolved by adjusting a screw bolt.
Engine · March 2017A 2006 Mazda MX-5 2.0i Sport with 38,000 miles had a momentary hesitation in 6th gear at constant speeds, which dealers could not resolve.
Electrics · January 2017The radio in a 2013 MX-5 with 35,000 miles would not stay on its selected station.
Electrics · November 2016A 2012 Mazda MX-5 developed a problem where the driver's seatbelt alarm light remained on, requiring a new pressure pad.
Electrics · September 2016Two heating elements of the rear screen failed on a 2014 Mazda MX-5, with a repair quoted at £1,550.
Bodywork · August 2015A rattle from the boot area was identified as a spring from the hinge mechanism that had come loose.
Bodywork · August 2014Roof motors on a 2008 Mazda MX-5 Roadster Coupe with 39,000 miles began to fail, with dealers quoting £2,700 for repairs.
Engine · April 2014A 2007 Mazda MX-5 with 90,000 miles and full Mazda service history experienced a connecting rod failure.
Gearbox and clutch · December 2012A 2009 MX-5 2.0 Sport-Tech experienced limited slip differential failure at 25,000 miles, costing £3,000 to repair.
Engine · August 2012A 2012 2.0i engine developed an engine management problem, requiring a new oxygen sensor and catalytic converter.
What owners like about the Mk3 NC
10 notes
This Mazda MX5 is a sweet, neat, back-to-basics sports car, considered the best small and affordable model ever produced.
The MX5 features twin-cam 16-valve engines, with 1.6-litre units producing 114bhp and 1.8-litre versions offering 130bhp.
The car features a well-designed factory hard-top, and the soft hood can be opened easily with one hand from the driver's seat.
The MX5 demonstrated strong reliability, ranking 8th in a 2002 Auto Express survey and showing low warranty repair costs in 2003.
The 1989 MX5 engine is a non-interference design, preventing valves from striking pistons if the timing belt breaks below 4,000rpm.
The Mazda MX-5 was ranked the highest sports car in a 2011 survey for its driving dynamics, reliability, and low ownership costs.
The Mazda MX-5 achieved an 82.4 percent satisfaction rating, showing an increase from the previous year's score.
The Mazda MX-5 (2005-2009) was rated as the 7th most reliable car over 15 years based on 2012 warranty claims.
The Mazda MX-5 was voted the most reliable new sports car in a 2013 Which? survey.
The Roadster Coupe model offers a driving experience comparable to the standard fabric roof version.
Generation 3 of 32 known faults · 3 owner reports · 5 good notes
Mazda MX-5 Mk4 ND (2015 to 2024) problems
Bodywork/ChassisMedium severity💬 3 owner reports, 2016 to 2019
On soft-top cars (not the RF, which has a folding hard top) the fabric roof gives trouble on early Mk4s: the inner lining separates from the outer skin over the rear window and drops to block the view, which Mazda knew about, and the two metal clips dealers fit to hold it put tension on the fabric that can wear through in time; another owner was told his roof fouled the headrests as it went up and down and wore through, needing a third roof, and Mazda was said to have redesigned the frame; and folding the roof single-handed on a 2019 car rubbed a hole where it crosses the roll hoop, which Mazda replaced free once but said it would not again.
Rough guide
£800-1500
Typical symptoms
inner lining sagging over the rear window
worn or holed fabric near the headrests or roll hoops
roof catching as it folds
Affected vehicles
Engines:
Soft-top cars only (not the RF, which has a folding hard top)
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Transmission/DrivetrainMedium severity💬 2 owner reports, 2018 to 2019
Two owners of 2016 and 2017 MX-5s had rear differential trouble. A 2017 2.0 bought nearly new handled worse and worse until the diff was found to have failed at 3,300 miles and was replaced under warranty; a 2016 car's diff was noisy and was repaired after four dealer visits, with Mazda paying 90 per cent.
Typical symptoms
noise from the rear differential
handling getting progressively worse
Affected vehicles
Engines:
All engines
Typical mileage:
unknown miles
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What owners report on the Mk4 ND
3 single reports, unconfirmed
One owner each, in their own words rewritten as a line, and not counted in our risk scoring. A fault joins the list above once a second report or an editorial source backs it.
Interior · September 2019The air conditioning failed on a 2016 Mazda MX-5 at 12,000 miles due to a corroded pipe, with Mazda covering 90% of the cost.
Engine · March 2017A Mazda MX-5 1.5 experienced loss of power and fuel consumption issues before its first service.
Bodywork · November 2016The inner lining of the hood separated from the exterior over the back window, obscuring rear vision.
What owners like about the Mk4 ND
5 notes
This car offers an engaging driving experience with well-weighted controls and excellent road feedback, making it entertaining at all speeds.
The car provides a good level of equipment, especially in mid-specification models.
The convertible roof is very easy to operate, folding up or down single-handedly from the driver's seat.
The car's heater warms up very quickly, providing rapid comfort inside the cabin.
The car achieved a four-star Euro NCAP rating, with strong scores for adult occupant, passenger, and pedestrian safety.
Repair costs are typical UK ranges, not quotes. Actual cost depends on condition and garage.Data last verified: November 2026
Mazda MX-5 buying questions
What are the most common Mazda MX-5 problems?
Three stand out. Bodywork: the Mk2 rusts through its sills and rear wheel arches as badly as the Mk1 did. Gearbox: the limited slip differential fitted to the sportier versions can break up internally (typically 25000 to 80000 miles). Bodywork: on the Roadster Coupe a rubber drain pipe runs from a drain hole in the seal between the powered. The full list above is grouped by generation, with typical mileage and a rough repair cost for each.
Which Mazda MX-5 years should I avoid?
No Mazda MX-5 year is a write-off, but the Mk2 NB (1998 to 2005) carries the most serious faults: bodywork. The Mk3 NC (2005 to 2015) has high-severity faults on record too. The Mk4 ND (2015 to 2024) has none rated high severity. Year matters less than whether the specific car has had the known fixes, so check the history for them.
What should I check when viewing a used Mazda MX-5?
Ask the seller about the bodywork and gearbox faults on this page and whether they have been fixed, with invoices. On the test drive watch for bubbling or holes in the sills behind the front wheels and ahead of the rear arches, whine from the rear that rises with road speed and water in the load area behind the seats, worst after parking on a slope. Read the MOT history for repeat advisories, then paste the advert into the free check, which reads it against all 7 known faults before you travel. Check a Mazda MX-5 advert →
What is the real MPG of a Mazda MX-5?
Owners report 37.6 mpg on average across the Mazda MX-5 engines with data, about 99% of the official combined figure. The gap between official and real-world economy varies a lot by engine, so the Real MPG page lists every engine and generation separately, from 1,019 owner submissions. Mazda MX-5 Real MPG by engine →
If you used to check the Honest John “Good & Bad” section before the site closed in 2026, this page is where that information now lives. We rebuilt the Mazda MX-5 owner-report history from the archived Honest John dataset, added our own research, specialist and owner-club sources and DVSA recall data, and we keep it free. Each fault above is badged with its source. The same data feeds our free advert check, which reads a listing against every known fault for the exact engine and year.