Buying a used ND Miata: the gearbox to check, the years to target, and soft top vs RF

The ND Miata is the newest, lightest and most livable Miata you can buy used, and the 2.0-liter engine has a clean record. The thing to check is the manual gearbox. Of the 84 owner complaints NHTSA holds for 2016-2026 MX-5s, 17 describe a manual transmission that failed, ground or refused gears. Eight of those are on 2016 cars, none on 2019-2021, and seven on 2022-2024. Mazda's own bulletin for the early cars covers 2016-2017 soft tops built before September 6, 2016, and the fix was a whole new transmission.

I'm Dana, Revnut's editor. Revnut doesn't road-test cars, so I won't pretend I've driven an ND. What I did do is read every complaint and recall NHTSA holds for the 2016-2026 MX-5, pull Mazda's service bulletins for the gearbox, the RF roof and the headlights, and turn them into the checklist below.

The specs, by year and market

Every US ND has the same 2.0-liter four. What changed is how much it makes.

	US 2016-2018	US 2019-2023	US 2024 on	Europe 1.5
Power	155 hp @ 6,000 rpm	181 hp @ 7,000 rpm	181 hp @ 7,000 rpm	131 PS, then 132 PS from 2019
Torque	148 lb-ft @ 4,600 rpm	151 lb-ft @ 4,000 rpm	151 lb-ft @ 4,000 rpm	152 Nm (2019 on)
Redline	6,800 rpm	7,500 rpm	7,500 rpm
Gearbox	6-speed manual or 6-speed automatic	same	same
EPA combined (manual / auto)	30 / 30 mpg (2016), 29 / 29 (2017-18)	29 / 30 mpg	29 / 29 mpg	not sold in the US

Why the numbers don't line up: Mazda reworked the 2.0 for the 2019 model year. Lighter pistons (27 g each) and connecting rods (41 g lighter), bigger valve lift and a wider exhaust manifold took it from 155 to 181 hp and raised the redline from 6,800 to 7,500 rpm, per Mazda USA. The same update added a telescoping steering wheel and a standard rearview camera. Owners call the cars ND1 (2016-2018) and ND2 (2019 on).

The market difference is simpler than it looks. Europe and the UK got two engines: a 1.5 with 131 PS and a 2.0 with 160 PS at launch, per Mazda UK, rising to 132 PS and 184 PS with the 2019 update (Mazda UK). The US only ever got the 2.0: Mazda's 2016 US spec sheet lists one engine, and its 2024 pricing release says "all MX-5 Miata models" use the 2.0 (Mazda USA). So a "132 hp" figure you see quoted is the European 1.5, in PS, and doesn't apply to any US car.

The base 2016 Sport with the manual weighs 2,332 lb, per Mazda's spec sheet. Mazda recommends 91-octane premium and lists 87 as the minimum, and the EPA rates it on premium.

The failure that matters: the manual gearbox

This is the one that strands people, usually without a warning light.

I sorted all 84 complaints by what the owner described. Manual gearbox failure or shift trouble shows up in 17 of them. By model year: 8 on 2016 cars, 1 on 2017, 1 on 2018, none on 2019, 2020 or 2021, then 2 on 2022, 4 on 2023 and 1 on 2024.

The early cars have a paper trail. Mazda's Technical Service Bulletin 05-001/17 describes "a grinding noise" shifting from 1st to 2nd or 2nd to 3rd, or cars where "it is impossible to shift into 2nd and/or 3rd gear while there is no problem shifting into other gears." Mazda blamed damage to 2nd and 3rd gears "if the vehicle was driven with rapid acceleration and deceleration using frequent shift changes," and changed their configuration "to increase the rigidity." The repair is to replace the complete transmission with a modified one. The bulletin applies to 2016-2017 MX-5 soft tops built before September 6, 2016, and notes that transmissions with serial number 6TJ0701679 or higher are already modified (Mazda TSB 05-001/17).

The narratives match it. A 2016 owner upshifting into 3rd "at about 6,500 rpm" had the transmission fail at 65 mph; the dealer "diagnosed a manual transmission failure, 3rd gear specifically" and replaced the whole unit free (complaint 11287640). Another 2016 owner was on a second transmission: "the second time I could only use 4th gear and had to limp home" (complaint 11208153). A 2018 Club owner's gearbox started whining in 6th and worked its way down: "I never expected my transmission to fail before I reached 20,000 miles," and with the car just out of warranty they were "out $2000+" (complaint 11595229).

Then the complaints pick up again on newer cars, with no bulletin I could find. A 2023 owner reports the transmission "has been replaced once and is scheduled to go in 9/23/24 for a possible second transmission replacement" (complaint 11613520). A 2024 car "could not get the manual transmission into 3rd gear... The vehicle only had 5,700 miles," and the dealer replaced the entire transmission (complaint 11705699).

Here's the catch on warranty: Mazda says the TSB repair is "covered under Mazda's Powertrain Limited Warranty term," and that term is 5 years or 60,000 miles, per Mazda's 2016 spec sheet (Mazda USA). Every 2016-2017 car is past it. One 2017 owner inside the TSB range says the dealer offered "only 50% goodwill" (complaint 11725675). Newer cars may still be inside 60,000 miles; check the original in-service date.

What I'd do:

• On a 2016-2017 soft top, ask whether the transmission was replaced under TSB 05-001/17. A dealer invoice for a transmission replacement is the best line you can find in an early ND's history.
• No record? Do the shift test in the inspection section below, and price a used or rebuilt gearbox into your offer.
• On a 2022-2024 car, ask the same question. Several owners report replacements under warranty. A car that's had one is a car whose gearbox is newer than its odometer.

Soft top, RF or automatic

Soft top or RF. The RF (retractable fastback) arrived for the 2017 model year in Club and Grand Touring trims (plus a Launch Edition), never as a base Sport, with the same engine and a choice of manual or automatic. Mazda says its roof opens or closes in about 13 seconds (Mazda USA). NHTSA files RF complaints under the plain MX-5 name, so they're inside the 84 above. Two practical differences:

• The RF has roof drains, and they clog. Mazda's bulletin for 2016-2022 RFs warns that clogged drains "may flood the interior of the vehicle." The owner's manual says to clean them at least every six months, or every one to three months if the car is parked near trees (Mazda TSB). Look under the RF's carpets for damp.
• The soft top's inner liner can sag. Three owners complained it droops across the small rear window. Mazda has a bulletin for it covering 2016-2024 soft tops, with clips added to hold the liner's J-hook (Mazda TSB 09-034/24). Cheap to fix, but check it with the roof up.

Note that the gearbox bulletin above names soft tops only. RF owners still file gearbox complaints, so do the same shift test.

Manual or automatic. The automatic has its own recall: campaign 19V072000, where Mazda's summary says incorrect transmission-control software on "certain 2016-2019 MX-5 (Miata) vehicles with automatic transmissions" can cause an unexpected downshift. The fix is a free software update. Beyond that, the automatic barely shows up in complaints.

Buy the manual. It's why the car exists, and the 2019-2021 manual cars have the cleanest record in the tally. Pick the automatic only if you genuinely won't drive a manual, and confirm the recall was done.

What else the complaints flag

• Air bags: 10 complaints. Most are about recall 24V695000, which covers 77,670 2016-2023 MX-5s: a software error in the air bag control module "may cause the front air bags to deploy with excessive force." Six owners report trouble getting the repair done, from dealers who didn't know about the recall to parts and tools that weren't available; in May 2026 one wrote "I've been on a waiting list for over 4 months and no tool is available yet" (complaint 11737415). Run the VIN and ask the seller whether it's been done.
• Steering: 6 complaints. Three describe steering that gets sticky once the car is fully warm: "the steering requires some pressure to 'break free'" (complaint 11728605, a 2023). Three more describe a momentary loss of power assist with a warning light. For 2024, Mazda says it fitted a new steering rack "revised internally, resulting in reduced friction" (Mazda USA). Mazda doesn't link that to the complaints, and 2024-on cars are still young.
• Adaptive headlights on 2024-2025 cars: 4 complaints. A "Headlight System Malfunction" warning keeps coming back. Mazda's bulletin for 2024-2025 MX-5s built before September 27, 2025, blames the AFS module "detecting a false headlight malfunction" and fixes it with software (Mazda TSB 09-011/26). One owner says a headlamp was replaced as well.
• Fuel pump, soft-top liner, glass and tires: 3 each. The fuel pump has a recall (21V875000, 2018-2019 cars: the pump's impeller "may crack and deform").

Two more recalls depending on the year: 19V496000 on 2016 cars, where the skid plate "may detach," and 25V336000 on 2024-2025 cars, where a software error can stop the traction and stability control warning light from coming on (dealers replace the DSC unit).

Modified and track cars: what you're actually buying

Miatas get modified and taken to track days more than almost anything else. Neither is a reason to walk. Both change what you check.

• Suspension. The most common change. Flyin' Miata, a big Miata parts maker, sells ND springs that it says lower the car to a 13-inch front ride height, with different rear rates for the soft top and RF (Flyin' Miata). Coilovers, sway bars and a lowered stance are mostly harmless on a well-set-up car. Look for uneven tire wear and scrape marks underneath.
• Forced induction. There are supercharger and turbo kits, mostly for the 2016-2018 cars. One is legal in California: the Edelbrock E-Force supercharger has CARB Executive Order D-215-95 covering "2016 to 2018 model year 2.0L Mazda Miatas," with boost rated up to 8.25 psi (CARB). Others aren't: HKS lists its GT2 supercharger kit for the 2.0 ND built up to September 2018 and notes "engine management part is not included" (HKS). More torque through a gearbox with the history above is a real risk.
• Clutch. Flyin' Miata says "the stock ND clutch can actually handle more power than stock," and sells an upgrade rated for 340 lb-ft (Flyin' Miata). An aftermarket clutch and flywheel usually means more power is or was on the car.
• Emissions. EPA's tampering policy says the Clean Air Act's prohibitions "apply for the entire life of vehicles, engines, and equipment. They apply regardless of whether the regulatory 'useful life' or warranty period has ended" (EPA). A boosted car without an Executive Order, or with the catalytic converter gone, can fail an emissions test however old it is.

How to spot a hard-used track car:

• An oil cooler. Flyin' Miata, which sells one, says the ND's oil "can get a little hot under hard use" and that the car "doesn't have an oil temperature sensor" (Flyin' Miata). Nobody fits one for commuting.
• Brake ducts, track pads, a roll bar, a tow hook, racing-belt mounts, or a set of spare wheels with worn performance tires in the deal.
• Heavy paint chipping or tape residue on the nose and mirrors, and a lot of tire wear on the outer shoulders.
• The service records. Mazda's severe schedule, which covers "driving with extended use of brakes," changes the manual transmission oil every 30,000 miles or 2 years instead of 60,000 or 4 (Mazda owner's manual). A tracked car that never had its gearbox oil changed is the worst combination on this page.

Ask a seller of a modified or tracked car: which parts, who fitted them, how many track days, and whether the stock parts come with it.

Reading the listing

• Year and build date. 2016-2018 is the 155 hp car; 2019 on is 181 hp. On a 2016-2017 soft top, the door-jamb build date tells you whether it's before September 6, 2016.
• Transmission history. "Transmission replaced under warranty" or "TSB done" is good news on an early car, not bad. Ask for the invoice.
• Service records. Mazda's normal schedule (from the 2021 owner's manual) calls for oil and filter whenever the wrench light comes on, at most every 12 months or 7,500 miles, and manual transmission oil every 60,000 miles or 4 years (Mazda owner's manual).
• The VIN. Run it through NHTSA's recall lookup, and get a title history from an approved NMVTIS provider. NMVTIS is the U.S. Department of Justice's title database, which all states, insurers and junk and salvage yards are required by federal law to report to, so it flags salvage and total-loss history (NMVTIS). A light roadster that's been off a track is worth that check.
• Modification wording. "Supercharged," "turbo," "Edelbrock," "FM," "coilovers," "track ready," "HPDE," "lightly tracked." Each one sends you back to the section above.

The first inspection

See the car cold, with the roof the way the seller usually keeps it.

1. Shift through every gear, cold and warm. Pay attention to 2nd and 3rd. Grinding, a gear that feels blocked, or whine under load in 3rd and 4th are the symptoms in Mazda's bulletin and in the complaints. One owner's car "spontaneously jumps out of 4th gear into neutral" on a downhill under engine braking (complaint 11206038).
2. Clutch. Check where it bites, and whether revs flare without the car speeding up in a high gear. One 2021 owner's clutch "had melted" at about 1,000 miles (complaint 11479986), so don't assume low miles means a fresh clutch.
3. Steering after 20 minutes. Drive long enough to get it fully hot, then make small corrections at highway speed. Sticky, notchy steering is what the complaints describe; a dealer couldn't reproduce one because it took "20-30 minutes of continuous driving" to show (complaint 11728605).
4. Roof. Cycle it. On a soft top, look at the rear window with the roof up for a sagging liner. On an RF, check the drains and the carpets.
5. Warning lights. Headlight warnings on 2024-2025 cars, power steering or DSC lights on any. Plug in an OBD scanner if you can.
6. Under the car. Scrapes, a bent or missing skid plate (2016 recall), fresh oil around the gearbox or differential.
7. An independent inspection. Even the Department of Justice's NMVTIS leaflet tells used-car buyers to "consider an independent inspection before purchasing." Ask a Miata specialist to check the gearbox shift quality specifically.

After you buy: the first jobs

• Manual transmission oil. If there's no record, do it now. Mazda's interval is 60,000 miles or 4 years on the normal schedule, half that on the severe one. Do it on the severe schedule if the car sees track days.
• Oil and filter, and reset the oil-life monitor, as Mazda's schedule says to do after every change.
• Recalls. Air bag software (2016-2023), fuel pump (2018-2019), automatic transmission software (2016-2019 automatics), skid plate (2016), DSC (2024-2025). Any Mazda dealer does recall work free.
• RF drains. Clean them on day one, then every six months.
• Coolant. In the 2021 owner's manual, Mazda's first change is at 120,000 miles or 10 years, which most 2016 cars are reaching on time. Mazda recommends its FL-22 coolant.
• Spark plugs every 75,000 miles. Check the records.

Which one I'd buy

A 2019-2021 manual. It's the 181 hp engine, after Mazda's gearbox redesign, and the tally has zero gearbox complaints for those three years. Soft top for the lightest car; RF if you live with it outside and will keep the drains clean.

A 2016-2017 soft top only with a transmission invoice, or a clean shift test priced accordingly. These are the cheapest NDs, and 8 of the 17 gearbox complaints are on 2016 cars.

A 2022 or newer car, with the warranty math done. The gearbox complaints came back for 2022-2024, so check whether it's still inside 5 years or 60,000 miles from its in-service date. The 2024-on cars get the new asymmetric limited-slip differential on the Club and the revised steering rack.

One honest limit on all of this: complaint counts aren't failure rates. They're self-reported, US-only, and not divided by how many cars were sold. The numbers are small, 84 complaints across 11 model years, and 2019-2021 together have just 15. The early-car pattern still lines up with Mazda's own bulletin, which is why I'd weight it most.

Who should skip it

If you need a car that never surprises you with a four-figure gearbox bill, skip the 2016-2017 soft tops without paperwork. If you'll track it hard and boost it, budget for the transmission, because nothing in the record says it gets stronger with more torque. And if you want a Miata for winter commuting on summer tires, one owner's original Yokohamas were told they had "micro cracks" after cold-weather use (complaint 11415450). Buy winter tires or buy something else.

For the generation before it, the NC is a heavier, simpler car with a different set of problems; see its Revnut page.

Where it sits on Revnut

On Revnut the ND sits at #53 of 378 generations by REVs, with 80, second of the four Miatas. Only the original NA ranks higher; the NB and the NC sit below it. If it's the one you'd buy, REV it on its page.

How this was made

Written by Dana Miles, Revnut's editor, from the sources below. The complaint figures come from NHTSA's public complaint database for 2016-2026 Mazda MX-5s (NHTSA lists the RF under the same name and has no separate RF entry), pulled on 12 October 2026: 84 complaints in all. I matched keywords in each owner's narrative, so one complaint can count toward more than one problem, and I read every gearbox match in full, dropping five that described clutches, automatics or unclear causes. Air bag complaints were counted by NHTSA's component field. Quotes from narratives filed in all capitals are set in sentence case; the words are unchanged. Recalls and Mazda's service bulletins come from NHTSA's recall and manufacturer-communication records. Revnut REV figures are from 12 October 2026.