2018 BMW 330i Problems and Top Complaints – Is Your Car A Lemon?

Vehicle structure, fuel system and engine issues among the top complaints received by the NHTSA from vehicle owners

Luxury sedans aren’t as popular as they once were, but that doesn’t stop the 2018 BMW 330i from making waves. This model has been hailed as “an iconic sports sedan born to be driven,” during recent years. Yet, owners don’t agree. Between massive engine failures, a defective structure, a malfunctioning fuel system and a shattering sunroof, this model has a lot to answer for.

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Problems with the Engine

When it comes to having an engine placed in a luxury vehicle, owners expect to receive the best. Still, the 2018 BMW 330i leaves a lot to be desired.

Among the customer complaints listed with Consumer Reports, it’s estimated that that majority of engine-related issues include, “Engine rebuild or replacement, cylinder head, head gasket, turbo or supercharger, timing chain or timing belt.”

The company even issued a massive recall related to the engine. Recall Number 18V465000 talks about the crankshaft sensor that has the wrong firmware, which prevents the sensor from processing input and causing a stalling situation. This only proves that the 330i can’t be praised as something that’s “born to be driven,” especially when it can’t seem to stay running.

Problems with the Vehicle Structure

As far as the structure of the 2018 BMW 330i, it’s to be expected that this model would be manufactured from high-quality components that stand up to the test of time. However, owners claim something different is occurring.

Here is one review from Edmunds that discusses several structural concerns. “Service manager at the dealer just confirmed 330i has tons of issues,  hope I knew about it before started 3 years lease on it… 1. excessive wind noise from the driver side door in cruising, suspects the door not closing all the way 2. squish and squeaks driving in low speed.”

BMW doesn’t attempt to hide any structural malfunctions. The company even goes as far as issuing Service Bulletin #B513016, which points out how the trunk or tailgate might open on its own, even when the vehicle is locked. Does this sound like quality engineering? Honestly, it just sounds like an overpriced lemon that’s born to do lots of things other than drive.

Problems with the Fuel System

The fuel system contains numerous parts that supply gasoline to the engine. When something is defective within this system, the car can’t operate as it was intended.

One NHTSA complaint talks about fuel system issues by stating, “Car was in motion on a street. Engine stalled. Car wouldn’t start. Towed to BMW dealership. Catastrophic high pressure fuel pump failure at approximately 7,400 miles. Metal shavings throughout entire fuel system. Injectors, fuel lines, fuel pump, and fuel tank needed to be replaced.”

What a nightmare for this owner, but it’s not an isolated case. Failures such as this are common on the internet among other 330i drivers. Yet, BMW doesn’t want to discuss it in any written communication. After all, how can this vehicle be the sports sedan customers want to drive if it can’t even start?

Problems with the Shattering Sunroof

When someone thinks of vehicle visibility, it’s common to think about the windshield first. While that’s a vital component, it’s also necessary to talk about the sunroof.

One NHTSA complaint illustrates the dangerous condition of the 330i sunroof by saying, “I was on the Capital Beltway outside Washington DC going about 60 mph and my sunroof suddenly shattered. It was extremely scary because it sounded like a gunshot going off. It was a very hot day, low 90s. Luckily I had just closed the sun visor so the glass did not pour down on me or my passengers. When we pulled over, we found a large hole in the front panel of the panoramic sunroof and shattered glass sitting on the fabric sun visor. The remaining glass was crackled. I just got this car, brand new, 2 weeks ago and I know it had been in a hail storm and had dents that had to be repaired just before I leased it. I’m suspicious that the hail storm may have damaged the sunroof glass as well.”

There are other complaints expressing the same occurrence, without the history of a hail storm, so it appears to be something related to the quality of glass BMW used on this model. Yet, once again, the automaker doesn’t want to talk about any auto glass deficiencies and has chosen rather to ignore the complaints. After all of this insight, it’s clear that the 2018 BMW 330i is born to do a lot of things, but driving surely isn’t one of them. An expensive lawn ornament might be a better destiny for this model.

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Brian Jones

About the Author:

Brian Jones spent more than 20 years working as an ASE Certified Master Tech and Parts Specialist at multiple dealerships. Brian has become an authority in the industry, traveling across the country to consult for car dealerships and contributing his expertise as a writer for several major automotive publications. In his spare time, Brian enjoys working on pickup trucks, muscle cars, Jeeps and anything related to motorsports.

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  • Tracie S

    2018 330i with 40k miles in shop for massive coolant failure. Entire coolant systems has to be replaced cost of $6000. Common problem my mechanic said mines 4th he has seen in 4 months. If you are not original owner BMW has nothing to say. Never again. Soon as it’s back its sold. Steer clear of this car!!!!

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