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ProblemsByVin File / 2018-INFINITI-Q50
2018 · infiniti

infiniti Q50 problems

1 safety recall. 39 owner complaints. We mapped every trouble spot before you sign the papers.

0 5 10
Reliability score
8.0 / 10

Solid reliability overall. Common issues are concentrated in a few systems.

0
Critical
1
Severe
0
Moderate

Top trouble spots 4 categories with 3+ complaints

engine
11 reports · avg $3,100
severe
airbags
4 reports · avg $1,100
moderate
electrical
4 reports · avg $850
moderate
wheels
3 reports · avg $400
moderate

What owners are saying recent NHTSA-filed complaints · verbatim

2018 Q50 · wheels
WHILE I WAS DRIVING MY INFINITI ON THE HIGHWAY MY SERPENTINE BELT SNAPPED 4 DIFFERENT TIMES WHILE IN MOTION. ALL WITHIN ONE YEAR. INCLUDING ME GETTING MY CAR BACK FROM THE DEALER AND THEM LETTING ME HAVE IT BACK THAT WAY. ALSO, THE TIRES ARE HORRENDOUS, FROM DAY ONE, THEY PULLED…
12/15/2018 · NHTSA ODI #11161699.0
2018 Q50 · other
The serpentine belt on my 2018 Infiniti Q50 Sport became contaminated with oil immediately after dealer turbo replacement at the end of August 2025, causing the belt to slip, shred, and be pulled into the engine. This resulted in sudden loss of essential engine functions and…
11/28/2025 · NHTSA ODI #11701863.0
2018 Q50 · other
GAS MILEAGE IS VERRY BAD ! IN CITY ONLY MY CAR GIVE ME 14 MPG AND HWY 18MPG INFINITI SAY IS. 20MPG CITY AND 29HWY. AND COMBINED 22MPG
11/20/2019 · NHTSA ODI #11281287.0
2018 Q50 · wheels
RUN FLAT TIRES WENT FLAT ON A POTHOLE THAT WAS NOT EVEN REALIZED ON A SUNDAY WITH NO SERVICE STATION OPEN. EVEN IF THEY WERE, THE TIRE HAS TO BE REPLACED, CANNOT BE REPAIRED. THERE IS NO SPARE TIRE OPTION- WHEN CONTACTED, COMPANY REFUSED " NOT POSSIBLE". THIS IS NOT SAFE AT ALL…
11/10/2018 · NHTSA ODI #11150686.0

Estimate your repair exposure

Drag to your current mileage. Numbers are derived from this vehicle's complaint history.

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At 80,000 miles
Likely repair cost in next 24 months
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Active recalls showing 1 of 1

severe NHTSA 17V476000 27/07/2017

Nissan North America, Inc

An engine stall can increase the risk of a crash.

Fix: Nissan will notify owners, and Infiniti dealers will reprogram the Fuel Pump Control Module (FPCM) with corrected software, free of charge. The recall began August 29, 2017. Owners may contact Infiniti customer service at 1-800-662-6200.

Common questions

Is the 2018 Infiniti Q50 reliable?

Mostly yes. With a reliability score of 8.0 out of 10 based on 39 owner complaints filed with NHTSA, the 2018 Infiniti Q50 is generally a sound vehicle. The areas to watch are listed in the top problem section above — most are budget items, not deal-breakers.

What's the most common problem on the 2018 Infiniti Q50?

Based on NHTSA records, the most-reported issue is engine, with 11 complaints filed. Average repair cost runs about $3,100 at an independent shop.

What's the most expensive thing that goes wrong?

The engine is one of the costlier repair items. Average repair cost runs about $3,100 at an independent shop. Catching early warning signs can sometimes extend life by 20–30,000 miles.

How do I check if my Infiniti Q50 has open recalls?

Paste your VIN into the decoder at the top of this page. We pull live from NHTSA, so you'll see exactly which campaigns apply to your vehicle and whether the dealer has logged the fix. Recall repairs are always free regardless of mileage or warranty status.

Is an extended warranty worth it on a 2018 Infiniti Q50?

Math is straightforward: a quality service contract runs $1,800–3,500 over 3 years. With 39 complaints on file and the costliest repair averaging $3,100, one major failure more than pays for it. The catch is reading the contract — many providers exclude wear items and require pre-authorization, so cheaper plans aren't always better value.

Related vehicles

Recall and complaint data sourced from the National Highway Traffic Safety Administration (NHTSA) public records database, last synced 15 hours ago. Editorial commentary written by ProblemsByVin contributors and reviewed by ASE-certified mechanics. We are not affiliated with infiniti. Some links on this page are affiliate links and we may earn a commission if you complete a quote or purchase.
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