2018 Mazda Mazda6 Safety Report
2018 Mazda Mazda6: Excellent Crash Safety, but Significant Engine Reliability and Stall Risks Identified by Recalls and Complaints
AI Safety Analysis for the 2018 Mazda Mazda6
Reliability Score
The 2018 Mazda Mazda6 receives a reliability score of 55 out of 100 based on analysis of NHTSA complaint data, recall history, crash reports, and safety ratings. This indicates average reliability — some notable concerns exist that prospective buyers should be aware of.
Known Issues for the 2018 Mazda Mazda6
The following issues have been identified from NHTSA complaint data and owner reports for the 2018 Mazda Mazda6:
| Issue | Severity | Frequency | Typical Mileage |
|---|---|---|---|
| Cracked Cylinder Head / Oil & Coolant Leaks Numerous complaints detail cracked cylinder heads leading to significant oil and coolant leaks, often onto the exhaust manifold, posing a fire hazard and causing engine overheating or failure. Mazda has acknowledged this with TSBs for some engine types, but non-turbo owners report similar issues. |
High | Common | 40000-80000 miles |
| Engine Stall (Software/Fuel Pump) Two recalls address engine stalling: one due to a faulty fuel pump impeller and another due to a powertrain control module (PCM) software error. Multiple complaints describe sudden loss of power or stalling while driving, increasing crash risk. |
High | Occasional | variable miles |
| Brake Caliper/Rotor Premature Failure Reports of premature caliper failure and rusted rotors at relatively low mileage, leading to grinding sounds and inability to change pads. |
Medium | Occasional | 30000-50000 miles |
| Hydraulic Lash Adjuster (Hla) Noise/Failure Loud knocking/tapping from the valve cover, attributed to hydraulic lash adjusters, with Mazda often stating it's out of warranty or suggesting high RPM driving. |
Medium | Occasional | 60000+ miles |
Common Problems Reported by Owners
Based on NHTSA complaint data, the following components account for the majority of reported issues with the 2018 Mazda Mazda6:
The most frequent complaints (18 out of 50) are related to the engine, specifically cracked cylinder heads, oil/coolant leaks, and unexpected stalls.
Complaints include fuel leaks and are supported by a recall for a faulty fuel pump impeller.
Issues reported include premature caliper failure, rusted rotors, and stuck brake pistons.
Includes issues like engine stalling due to PCM software errors, as addressed by a recall.
Frequently Asked Questions About the 2018 Mazda Mazda6
Is the 2018 Mazda Mazda6 safe?
Based on NHTSA data, the 2018 Mazda Mazda6 has excellent crash test ratings, achieving 5 stars overall. However, it has significant reliability concerns, particularly with engine issues like cracked cylinder heads and unexpected stalls, which have led to 50 complaints, 1 crash, 1 fire, and 1 injury, and are addressed by two safety recalls.
What are common problems with the 2018 Mazda Mazda6?
The most reported issues for the 2018 Mazda Mazda6 are engine-related, accounting for 18 complaints. These frequently involve cracked cylinder heads leading to oil and coolant leaks, and engine stalls due to either fuel pump issues or powertrain control module software errors, both of which have been subject to recalls. Brake system issues like premature caliper failure are also reported.
Are there any recalls for the 2018 Mazda Mazda6?
Yes, the 2018 Mazda Mazda6 has two recalls. One recall (NHTSA ID: 19V885000) addresses a faulty low-pressure fuel pump impeller that can cause an engine stall. The second recall (NHTSA ID: 19V497000) is for a powertrain control module (PCM) software error that may also cause the engine to stall.
Does the 2018 Mazda Mazda6 have engine problems?
Yes, the 2018 Mazda Mazda6 has notable engine problems. 'ENGINE' is the top complaint component with 18 reports, frequently detailing cracked cylinder heads, significant oil and coolant leaks (some posing fire hazards), and unexpected engine stalls. These issues are also reflected in one of the two safety recalls.
How does the 2018 Mazda Mazda6 perform in crash tests?
The 2018 Mazda Mazda6 performs exceptionally well in NHTSA crash tests, earning a 5-star Overall Safety Rating. It received 5 stars for Frontal Crash, 5 stars for Side Crash, and 4 stars for Rollover resistance.
Buyer Advice
Our recommendation: While the 2018 Mazda Mazda6 offers excellent crash protection, potential buyers should be aware of significant engine reliability issues, particularly cracked cylinder heads and stalling risks, and verify all recall repairs have been completed.
NHTSA Data Summary for 2018 Mazda Mazda6
This safety report is based on a comprehensive analysis of data from the National Highway Traffic Safety Administration (NHTSA) for the 2018 Mazda Mazda6. The data includes 50 consumer complaints filed by vehicle owners, 2 manufacturer-initiated safety recalls, 1 reported crashes, 1 fire incidents, 1 reported injuries, and safety rating assessments associated with this vehicle.
The NHTSA has assigned the 2018 Mazda Mazda6 an overall safety rating of 5 out of 5 stars, with a frontal crash rating of 5 stars, a side crash rating of 5 stars, and a rollover rating of 4 stars. These ratings are determined through controlled crash testing conducted by the NHTSA.
All data presented in this report is sourced from public NHTSA databases. Our AI analysis identifies patterns across complaint narratives, correlates them with recall history, and produces the safety assessment above. This analysis is updated as new complaints and recalls are filed with the NHTSA.
Consumers are encouraged to report vehicle safety problems to the NHTSA at nhtsa.gov. If your vehicle is subject to a recall, contact your dealer to schedule the free repair.