What are the most common Mazda MX-5 Miata problems?
According to Au7o's analysis of 6,100+ owner reports, the 2018 Mazda MX-5 Miata has 4 documented issues. The most frequently reported are: Denso Low-Pressure Fuel Pump Impeller Cracking Causing Stall - NHTSA Recall 21V875, Soft Top Wear and Rear Window Delamination, Differential Whine (ND). Of these, 1 is rated critical and should be addressed promptly.
Is the Mazda MX-5 Miata reliable?
The 2018 Mazda MX-5 Miata has 4 known issues documented across 6,100+ owner reports. 1 issue is rated critical: Denso Low-Pressure Fuel Pump Impeller Cracking Causing Stall - NHTSA Recall 21V875. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Mazda MX-5 Miata problems?
Repair costs for known Mazda MX-5 Miata issues range from $0 to $1,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Denso Low-Pressure Fuel Pump Impeller Cracking Causing Stall - NHTSA Recall 21V875, typically costs $0-$0 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2018-2019 Mazda MX-5 Miata Denso Low-Pressure Fuel Pump Impeller Cracking Causing Stall - NHTSA Recall 21V875?
2018-2019 MX-5 models are among 121,038 Mazdas recalled in November 2021 (NHTSA 21V875, Mazda campaign 5321K) for a defective Denso in-tank low-pressure fuel pump. Impellers manufactured with lower-than-specified density and exposed to production drying solvent for too long devel… Repairs typically run $0-$0. Severity: high.
What is the 1990-2025 Mazda MX-5 Miata Soft Top Wear and Rear Window Delamination?
Miata soft tops deteriorate over time from UV exposure, flexing during operation, and age. Vinyl tops develop cracks and tears, cloth tops fade and shrink. The rear plastic window (NA/NB) or glass window (NC/ND) can delaminate from the top material, causing water leaks and reduce… Repairs typically run $300-$1,500. Severity: medium.
What is the 2016-2025 Mazda MX-5 Miata Differential Whine (ND)?
The ND Miata (2016+) rear differential produces a noticeable whine or hum at highway speeds (50-70 mph) under light load. The noise is gear mesh related and varies with speed and throttle position. While not typically indicative of imminent failure, the noise is audible in the ca… Repairs typically run $50-$1,500. Severity: low.
What is the 2016-2025 Mazda MX-5 Miata Mazda Connect Infotainment USB and Bluetooth Connectivity Issues (ND)?
The ND Miata's Mazda Connect infotainment system is plagued by USB connectivity drops, Bluetooth pairing failures, and occasional system freezes. USB-connected phones may disconnect repeatedly, and Bluetooth audio can cut out or develop significant delay. The 7-inch screen can fr… Repairs typically run $0-$500. Severity: low.
