2018 Mazda Cx-5 Safety Report
2018 Mazda CX-5: Excellent Crash Safety Undermined by Pervasive Engine Defect and Multiple Recalls
AI Safety Analysis for the 2018 Mazda Cx-5
Reliability Score
The 2018 Mazda Cx-5 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 Cx-5
The following issues have been identified from NHTSA complaint data and owner reports for the 2018 Mazda Cx-5:
| Issue | Severity | Frequency | Typical Mileage |
|---|---|---|---|
| Cracked Cylinder Head A manufacturing defect in the aluminum cylinder head casting leads to cracks, causing engine oil and/or coolant leaks onto the exhaust manifold. This results in burning smells, smoke from the engine, potential fire hazard, and eventual engine failure if not addressed. Many complaints indicate this is a known issue for 2018-2021 models. |
High | Common | 30000-75000 miles |
| Engine Stall Due To Fuel Pump Impeller Recall 20V-121 addresses a defective low-pressure fuel pump impeller that can cause the fuel pump to fail, leading to an engine stall and increasing the risk of a crash. |
High | Occasional | variable miles |
| Engine Stall Due To Pcm Software Error Recall 19V-825 identifies a software error in the powertrain control module (PCM) that may cause the engine to stall unexpectedly, increasing the risk of a crash. |
High | Occasional | variable miles |
| Side Curtain Airbag Deployment Issue Recall 18V-398 indicates that side curtain airbags may not properly unfold during deployment in a side impact or rollover crash, increasing the risk of injury. |
High | Rare | N/A miles |
| Infotainment System Malfunctions The infotainment system may consistently change stations and volume on its own, with the control knob becoming unresponsive. This can also affect collision notification and navigation systems, creating driver distraction. |
Medium | Occasional | variable 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 Cx-5:
The vast majority of complaints (68 out of 84) are related to the engine, primarily concerning cracked cylinder heads leading to oil leaks, burning smells, smoke, and potential engine failure. Other engine issues include ticking noises and misfires.
Several complaints mention power train issues, often in conjunction with engine problems, contributing to loss of power or unexpected stalls.
A few complaints mention electrical system issues, particularly related to the infotainment system malfunctioning, which can affect radio, volume, and safety features like collision notification.
Frequently Asked Questions About the 2018 Mazda Cx-5
Is the 2018 Mazda CX-5 safe?
Based on NHTSA data, the 2018 Mazda CX-5 received excellent 5-star crash test ratings overall, for frontal, and side impacts, and 4 stars for rollover. However, its safety record is significantly impacted by a high volume of engine-related complaints (68 out of 84 total complaints) concerning a cracked cylinder head defect, which can lead to oil leaks, burning smells, and potential engine failure. Additionally, there are three safety recalls, two of which address issues that could cause unexpected engine stalls, increasing crash risk. While it performs well in crashes, its operational reliability and potential for critical component failure are notable concerns.
What are common problems with the 2018 Mazda CX-5?
The most reported issue by far is a cracked cylinder head in the engine, accounting for over 80% of all complaints. This defect causes oil leaks, burning smells, smoke, and can lead to engine failure. Other common problems include potential engine stalls due to recalled fuel pump or PCM software issues, and some reports of infotainment system malfunctions.
Are there any recalls for the 2018 Mazda CX-5?
Yes, the 2018 Mazda CX-5 has three recalls. These include a recall for a defective low-pressure fuel pump impeller (20V-121) that can cause engine stall, a recall for a powertrain control module (PCM) software error (19V-825) that can also cause engine stall, and a recall for side curtain airbags (18V-398) that may not deploy properly in a crash.
How does the 2018 Mazda CX-5 perform in crash tests?
The 2018 Mazda CX-5 performed 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.
What should I look out for if buying a used 2018 Mazda CX-5?
If considering a used 2018 Mazda CX-5, be highly vigilant for signs of a cracked cylinder head, such as burning oil smells, smoke from the engine, or visible oil leaks. Inquire about any engine repairs, especially cylinder head replacements, and ensure all three safety recalls (fuel pump, PCM software, and airbags) have been addressed by a Mazda dealership. A pre-purchase inspection by a trusted mechanic, specifically checking for engine leaks and recall completion, is strongly recommended.
Buyer Advice
Our recommendation: Despite excellent crash test ratings, potential buyers should be aware of the significant and common cracked cylinder head engine defect and ensure all three safety recalls have been completed, as these issues can severely impact reliability and operational safety.
NHTSA Data Summary for 2018 Mazda Cx-5
This safety report is based on a comprehensive analysis of data from the National Highway Traffic Safety Administration (NHTSA) for the 2018 Mazda Cx-5. The data includes 84 consumer complaints filed by vehicle owners, 3 manufacturer-initiated safety recalls, and safety rating assessments associated with this vehicle.
The NHTSA has assigned the 2018 Mazda Cx-5 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.