2018 BMW 4 Series VIN Check, Recalls & Reliability

The 2018 BMW 4-Series has mixed reliability. There are 21 recalls and 261 owner complaints on file for the 2018 BMW 4-Series. Severity signals include 21 crash-related complaints and 6 fire-related complaints. The most commonly reported problem areas are: Air Bags (64), Electrical System (35), Engine (31).

4-Series reliability snapshot

54/100

Latest model-year reliability score

3.0/5

RepairPal rating (overall)

Data sourced from Auto Reliability Index, aggregating NHTSA recalls, owner complaints, and RepairPal repair-cost records.

Used-car research

Research the BMW 4-Series before checking the VIN

Compare model years, recurring problems, safety campaigns and market value first. Then use the VIN to verify the history of the individual car.

Years to avoidThe weakest years and stronger alternatives Common problemsComplaint patterns across model years Recall historyNHTSA campaigns grouped by model year

Most-reported 2018 BMW 4-Series issues

Owner-reported problem categories from NHTSA complaint filings. Counts reflect complaints per category for the most-recent model year on file.

Air Bags64
Electrical System35
Engine31
Seat Belts23
Unknown Or Other20
Engine And Engine Cooling13

Pre-purchase inspection checklist for the 2018 BMW 4-Series

Hands-on checks distilled from real NHTSA complaint patterns and recall histories. Bring this list to a test drive or mechanic inspection.

Inspect oil filter housing for leaks or cracks
Check coolant system for leaks, especially hoses and pump
Test passenger airbag sensor and seat belt alerts
Verify electrical system functionality, including rear defroster
Ensure no unintended acceleration or cruise control issues
Check for recalls on fuel system components

What owners reported

2018 BMW 4-Series owner complaints in detail

Owners have reported 21 crashes, 6 fires and 23 injuries to NHTSA for the 2018 BMW 4-Series. These are unverified owner reports, not confirmed defect rates.

Owner complaints38

AIR BAGS

Owners of the 2018 BMW 4-Series frequently report issues with the passenger seat occupancy sensor, which often leads to a "Passenger restraint system malfunction" warning. This problem typically results in the deactivation of the passenger airbag, posing a significant safety risk. Complaints commonly involve vehicles with mileage under 40,000, and repairs for this issue can be costly, exceeding $2,000. Additionally, there are reports of airbags failing to deploy during accidents, leading to injuries. Used car buyers should be aware of these potential safety and financial implications.

Severity signals: 3 crash, 0 fire, 5 injury reports

Owner complaints26

ELECTRICAL SYSTEM

Owners of the 2018 BMW 4-Series frequently report electrical system issues, with common problems including passenger restraint system malfunctions, electrical call system failures, and intermittent electrical issues affecting various vehicle functions. Typical symptoms described involve warning lights, malfunctioning audio and navigation systems, and problems with the rear window defroster wiring, which in some cases lead to fires. Complaints often arise around the mid-range mileage of approximately 10,000 to 51,000 miles. Safety implications are significant, with reports of two crashes, two fires, and two injuries linked to these electrical problems. Potential buyers should be aware of these issues, as they may impact vehicle reliability and safety.

Severity signals: 2 crash, 2 fire, 2 injury reports

Owner complaints25

ENGINE

Owners of the 2018 BMW 4-Series frequently report issues with the engine related to coolant system failures, particularly involving the oil filter housing and coolant hoses. Common symptoms include overheating warnings, coolant leaks, and sudden engine shutdowns, often occurring around 50,000 to 65,000 miles. Several complaints also mention fires, with three incidents involving engine compartment fires and one report of an injury due to sudden speed reduction. Buyers should be aware of the potential for significant repair costs and the risk of engine damage if these issues are not addressed promptly.

Severity signals: 0 crash, 3 fire, 1 injury reports

Owner complaints15

UNKNOWN OR OTHER

Owners of the 2018 BMW 4-Series frequently report issues related to coolant and oil system leaks, often citing cracked plastic components as the cause, particularly around 60,000 to 70,000 miles. Symptoms include overheating and potential mixing of oil and coolant, which can lead to further engine damage. Several complaints also mention malfunctions in the vehicle's safety systems, such as ineffective rear cross-traffic alerts and inadequate lane departure warnings, which may compromise driving safety. Notably, there are reports of unintended acceleration and a fire incident, both of which resulted in injuries, highlighting significant safety concerns. Buyers should be aware of these recurring issues and their potential impact on vehicle reliability and safety.

Severity signals: 1 crash, 1 fire, 4 injury reports

Owner complaints14

SEAT BELTS

Owners of the 2018 BMW 4-Series frequently report issues with the passenger restraint system and seat belts. Common symptoms include a persistent "passenger restraint system malfunction" warning and false seat belt alerts, even when the seat is unoccupied or the seat belt is fastened. Some complaints mention the need for expensive repairs, such as sensor mat replacements, typically costing around $2000 to $2800. One report involves a crash where the passenger seat belt failed to lock properly, resulting in an injury. These issues often occur at varying mileages, with at least one case noted at 77,000 miles. Potential buyers should be aware of these reported malfunctions and the associated repair costs.

Severity signals: 1 crash, 0 fire, 2 injury reports

Owner complaints12

ENGINE AND ENGINE COOLING

Owners of the 2018 BMW 4-Series frequently report issues related to coolant leaks, with multiple complaints indicating problems with the water pump and coolant hoses. Symptoms commonly described include illuminated coolant warning lights, engine overheating, and visible coolant leaks under the vehicle. These issues often occur around 50,000 to 80,000 miles, with some reports of repeated failures after repairs. Additionally, some owners experience engine stalling and reduced power, with one instance of engine combustion and smoke entering the cabin, which could have safety implications. Buyers should be aware of these recurring cooling system problems when considering this model.

Owner complaints8

POWER TRAIN

Owners of the 2018 BMW 4-Series frequently report powertrain issues, particularly involving stalling and sudden acceleration. Common symptoms include the vehicle shutting off unexpectedly while driving or at a stop, error messages such as "drivetrain malfunction," and significant rattling or shaking during cold starts. Some complaints involve serious safety implications, including two crashes with injuries, one involving unexpected acceleration and another involving loss of control at higher speeds. These issues often occur at relatively low mileages, such as 22,000 miles, and are sometimes associated with fuel pump and driveshaft flex disc failures. Buyers should be aware of these potential problems and the associated safety risks when considering this model.

Severity signals: 2 crash, 0 fire, 2 injury reports

Owner complaints7

FUEL SYSTEM

Owners of the 2018 BMW 4-Series frequently report issues related to the fuel system, particularly with diesel models. Complaints often mention problems such as the vehicle shuddering or stalling while driving, failure to start, and abnormal fuel odors. These issues are sometimes linked to a recall that owners indicate has not been resolved due to unavailable parts. The failure mileage reported by owners varies, with some incidents occurring around 34,914 miles and others at higher mileages like 102,000 miles. While no crashes or fires are reported, the stalling and shuddering at highway speeds may pose safety risks.

Owner complaints4

VEHICLE SPEED CONTROL

Owners of the 2018 BMW 4-Series report issues with vehicle speed control, particularly involving the cruise control system and sudden unintended acceleration. One complaint describes a stuck cruise control rocker switch that causes the vehicle to accelerate uncontrollably, increasing speed from 61 mph to over 80 mph, posing a risk of collision. Another owner reports a crash resulting from unexpected acceleration while parking, which mirrors a similar issue experienced with a previous BMW model. These incidents typically occur at varying mileages and involve scenarios where precise speed control is crucial, such as merging or parking. Two complaints involve crashes, highlighting potential safety implications, including loss of control and collision with stationary objects.

Severity signals: 2 crash, 0 fire, 0 injury reports

Owner complaints4

SERVICE BRAKES

Owners of the 2018 BMW 4-Series report issues related to unexpected acceleration and brake failure, with some incidents leading to crashes. Complaints frequently mention the vehicle accelerating while the brake is applied, occurring in both stationary and moving situations. One owner describes the brakes failing to stop the vehicle, resulting in a collision, while another notes the absence of a brake wear warning light despite severe pad wear. These issues are reported at various mileage points, including around 25,000 and 40,000 miles. The safety implications are significant, as multiple reports involve crashes or near-misses, highlighting potential risks for used car buyers.

Severity signals: 1 crash, 0 fire, 0 injury reports

2018 4-Series recalls (10)

Every NHTSA safety recall logged against the 2018 4-Series. A VIN check confirms whether any recall remains unrepaired on a specific vehicle.

FUEL SYSTEM, DIESELNHTSA 21V907000Nov 19, 2021
BMW of North America, LLC (BMW) is recalling certain 2013-2018 328d, 328d xDrive, 2014-2018 328d Sports Wagon, 328d xDrive Sports Wagon, 2014-2016 535d, 535d xDrive, 2015 740Ld xDrive, 2015-2017 X3 xDrive28d SAV, and 2014-2017 X5 xDrive35d SAV diesel vehicles equipped with an Exhaust Gas Recirculation (EGR) module with an integrated cooler. The EGR cooler may leak internally, causing coolant to mix with diesel engine soot, which could result in smoldering particles and a melting intake manifold.
Consequence: A melting intake manifold increases the risk of a fire.
Remedy
Dealers will replace the EGR cooler and inspect the intake manifold, replacing it as necessary, free of charge. This recall includes all vehicles previously recalled under 18V-755. Vehicles previously recalled under 18V-755 will need to have the new remedy performed for this recall. An interim owner notification letter was mailed on January 18, 2022. The remedy is expected to be available in June 2022. Owner notification letters were mailed on July 6, 2022. Owners may contact BMW customer service at 1-800-525-7417.
FUEL SYSTEM, DIESELNHTSA 21V586000Jul 29, 2021
BMW of North America, LLC (BMW) is recalling certain 2014-2018 328d, 328d xDrive, X5 xDrive35d, 2014-2016 535d, 535d xDrive, 2015 740Ld xDrive, and 2015-2017 X3 xDrive28d vehicles. The high-pressure fuel pump may fail.
Consequence: Fuel pump failure can cause an engine stall while driving, increasing the risk of a crash.
Remedy
Dealers will replace the high-pressure fuel pump, free of charge. Owner notification letters were mailed on January 14, 2022. Owners may contact BMW customer service at 1-800-525-7417.
ENGINE AND ENGINE COOLINGNHTSA 18V755000Oct 25, 2018
BMW of North America, LLC (BMW) is recalling certain 2013-2018 BMW 328d and 328d xDrive, 2014-2018 328d Sports Wagon and 328d xDrive Sports Wagon, 2014-2016 535d and 535d xDrive, 2015 740Ld xDrive, 2015-2017 X3 xDrive28d SAV and 2014-2017 X5 xDrive35d SAV vehicles equipped with an Exhaust Gas Recirculation (EGR) module with an integrated cooler. If the EGR cooler leaks internally, the coolant can mix with diesel engine soot. The high EGR temperatures may result in these particles possibly smoldering and melting the intake manifold.
Consequence: The melting intake manifold can increase the risk of a fire.
Remedy
BMW will notify owners, and dealers will inspect and replace the EGR cooler as necessary. If a leak has already occurred, the engine intake manifold will also be replaced. These repairs will be made free of charge. The recall began May 13, 2019. Owners may contact BMW customer service at 1-800-525-7417.
EQUIPMENTNHTSA 18V652000Sep 20, 2018
BMW of North America, LLC (BMW) is recalling certain 2018 BMW 330e iPerformance, i3 Rex, i3 Sport Rex, X5 xDrive40e, i3 BEV, i3 Sport BEV and 2019 i8 and i8 Roadster vehicles and 2018-2019 530e iPerformance, 530e xDrive iPerformance and 740Le xDrive iPerformance vehicles. Capacitors within the TurboCord Portable Chargers may fail, possibly resulting in a shock hazard or a fire.
Consequence: An electrical shock or a fire can increase the risk of injury or death.
Remedy
BMW will notify owners, and dealers will inspect the charging cable, and replace it if necessary, free of charge. The recall began February 22, 2019. Owners may contact BMW customer service at 1-800-525-7417.
ENGINE AND ENGINE COOLINGNHTSA 18V465000Jul 11, 2018
BMW of North America, LLC (BMW) is recalling certain 2018 BMW 540d xDrive vehicles. The crankshaft sensor may be equipped with incorrect firmware, preventing the sensor from properly processing input from the crankshaft reluctor ring, possibly resulting in a vehicle stall. On September 12, 2018, BMW expanded the recall to a total of 5,309 vehicles including certain 2018-2019 BMW 540d xDrive, 230i M240i, M240i xDrive, X2 sDrive28i, X2 xDrive28i, X1 sDrive28i, X1 xDrive28i, 330i, 330i xDrive, 340i, 340i xDrive, 330i xDrive Gran Turismo, 530i, 530i xDrive, 540i, 540i xDrive, 530e, 530e xDrive, 640i xDrive Gran Turismo, 330e, 2019 430i Gran Coupe, 430i xDrive Gran Coupe, 440i Gran Coupe, 440i xDrive Gran Coupe, 430i, 430i xDrive, 440i, 440i xDrive, 740i, 740i xDrive, MINI Cooper, Cooper S, JCW, MINI Countryman (Cooper, Cooper All4, Cooper S, Cooper S All4, JCW All4), and MINI Clubman (Cooper, Cooper S, Cooper All4, Cooper S All4, JCW All4) vehicles.
Consequence: A vehicle stall can increase the risk of a crash.
Remedy
BMW will notify owners, and dealers will replace the crankshaft sensor, free of charge. The recall began September 6, 2018. Owners may contact BMW customer service at 1-800-525-7417.
SEAT BELTSNHTSA 17V507000Aug 16, 2017
BMW of North America, LLC (BMW) is recalling certain 2018 430i, 430i xDrive, 440i, 440i xDrive, and M4 convertible vehicles. The Emergency Locking Retractors (ELR) within the front seat belt assemblies may have been produced with incompatible vehicle-sensitive locking mechanism housings.
Consequence: If the vehicle has an incompatible vehicle-sensitive locking mechanism, the seat belt may not restrain the seat occupant in the event of a crash, increasing the risk of injury.
Remedy
BMW will notify owners, and dealers will inspect and, if necessary replace, the front seat belt assemblies, free of charge. The recall began October 13, 2017. Owners may contact BMW customer service at 1-800-525-7417.
ENGINE AND ENGINE COOLINGNHTSA 24V588000Aug 8, 2024
BMW of North America, LLC. (BMW) is recalling certain 540d xDrive vehicles that were previously repaired under recall number 22V-614. The exhaust gas recirculation (EGR) cooler may leak internally, causing coolant to mix with diesel engine soot, which could result in smoldering particles and a melting intake manifold.
Consequence: An EGR valve with smoldering particles and a melting intake manifold increases the risk of an engine fire.
Remedy
Dealers will inspect and replace the EGR module and the intake manifold as necessary, free of charge. Owner notification letters were mailed October 7, 2024. Owners may contact BMW customer service at 1-800-525-7417.
ENGINE AND ENGINE COOLINGNHTSA 22V614000Aug 10, 2022
BMW of North America, LLC. (BMW) is recalling certain 2018 540d xDrive vehicles equipped with an Exhaust Gas Recirculation (EGR) module with an integrated cooler. The EGR cooler may leak internally, causing coolant to mix with diesel engine soot, which could result in smoldering particles and a melting intake manifold.
Consequence: A melting intake manifold increases the risk of fire.
Remedy
Dealers will replace the EGR module, and the intake manifold will be inspected and replaced, if necessary, free of charge. Interim owner notification letters were mailed on October 7, 2022. Owner notification letters were mailed December 30, 2022. Owners may contact BMW customer service at 1-800-525-7417.
AIR BAGSNHTSA 20V243000Apr 29, 2020
BMW of North America, LLC (BMW) is recalling certain 2017 530i, 530i xDrive, 540i and 540i xDrive and 2017-2018 530e xDrive vehicles. Prior exposure to excessive levels of humidity within the driver and passenger head air bag inflators may affect the proper deployment of the head air bags.
Consequence: In the event of a crash of sufficient severity, deployment of the head air bag may be impaired and/or the igniter could separate from the inflator, increasing the risk of injury.
Remedy
BMW will notify owners, and dealers will replace the left or right head air bag, free of charge. The recall began June 24, 2020. Owners may contact BMW customer service at 1-800-525-7417.
BACK OVER PREVENTIONNHTSA 19V684000Sep 27, 2019
BMW of North America, LLC (BMW) is recalling certain 2018 540d, 2018-2020 530i, 530i xDrive, 540i, 540i xDrive, M550i xDrive, M5, 530e, 530e xDrive, X3 sDrive, X3 xDrive, X3 M40i, X3 M, and 2019-2020 X4 xDrive, X4 M40i, X4 M, X7 xDrive, X7 M50i, 740Li, 740Li xDrive, 750Li, 750Li xDrive, 8 Series Convertible and Coupe 840i, 840i xDrive, M850i xDrive, X5 sDrive, X5 xDrive, X5 M50i, X6 xDrive, X6 M50i, 330i, 330i xDrive, M340i, M340i xDrive, Z4 sDrive, Z4 M40i, 740Le xDrive and 745Le xDrive, 2018-2019 640i xDrive Gran Turismo and Rolls-Royce Phantom, 2019 M850i xDrive Gran Coupe and Rolls-Royce Cullinan and 2020 Toyota Supra vehicles. The back-up camera and display settings can be adjusted such that the rear view image is no longer visible and the system will retain that setting the next time the vehicle is placed in reverse. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rearview Mirrors."
Consequence: The lack of an image in the back-up camera display increases the risk of a crash.
Remedy
BMW will notify owners, and dealers will update the back-up camera software, free of charge. The recall began November 8, 2019. Owners may contact BMW customer service at 1-800-525-7417 or Rolls-Royce at 1-877-877-3735. Toyota owners may contact Toyota customer service at 1-888-270-9371.

Used-market value

2018 BMW 4-Series resale snapshot

$31,590median asking price from 47 listings

Listing benchmarks establish a market range; trim, mileage, condition, title history and prior damage determine what one vehicle is worth.

Full BMW 4-Series market analysis at CarResaleValue →

2018 BMW 4-Series on the road

31,379 2018 BMW 4-Series units were sold new in the US — a key signal for the size of today's used-market inventory.

How the 2018 BMW 4-Series stacks up against rivals

The most-shopped alternatives in the same segment. Each link opens a side-by-side reliability and cost comparison.

Mercedes-Benz C-Class

Reliability: 82/100·Rivalry score: 90

Compare vs 2018 BMW 4-Series →

Mercedes-Benz E-Class

Reliability: 76/100·Rivalry score: 85

Compare vs 2018 BMW 4-Series →

Toyota Supra

Reliability: 78/100·Rivalry score: 85

Compare vs 2018 BMW 4-Series →

BMW 5-Series

Reliability: 71/100·Rivalry score: 80

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What you get in a 2018 BMW 4 Series report

Available title brand history

Odometer readings & rollback detection

Accident & damage records

Auction sales with photos

Open safety recalls

Theft & stolen vehicle check

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2018 BMW 4 Series — Frequently asked questions

Is the 2018 BMW 4 Series reliable?

The 2018 BMW 4 Series has a reliability score of 54/100 based on aggregated recall and owner-complaint data.

How many recalls does the 2018 BMW 4 Series have?

10 NHTSA safety recalls have been issued for the 2018 BMW 4 Series. A VIN check confirms whether any remain unrepaired on a specific vehicle.

What are the most common 2018 BMW 4 Series problems?

The most-reported 2018 BMW 4 Series problem areas are: Air Bags (64), Electrical System (35), Engine (31).

Should I run a VIN check on a 2018 BMW 4 Series?

Yes. A VIN report verifies title brands, odometer history, accident records, and recall completion on a specific 2018 BMW 4 Series, complementing the model-year reliability data on this page.