Is the 2018 Bmw 740I reliable?

The 2018 Bmw 740I has 6 complaints filed with NHTSA (0.5x the segment average). Our reliability verdict: above-average. Most common issue: ENGINE problems.

What are common problems with the 2018 Bmw 740I?

Top problems: ENGINE (2 complaints, avg repair $500); SUSPENSION (2 complaints, avg repair $500); ELECTRICAL (1 complaints, avg repair $500). Issues typically appear around 50K miles.

Are there any recalls on the 2018 Bmw 740I?

No recalls have been issued for the 2018 Bmw 740I.

How much does it cost to fuel a 2018 Bmw 740I?

The 2018 Bmw 740I gets 24 MPG combined. At current US average gas prices, driving 12,000 miles per year costs roughly $2000. See the interactive fuel cost calculator on this page for state-specific pricing.

How much does it cost to insure a 2018 Bmw 740I?

Estimated US average full-coverage insurance for the 2018 Bmw 740I is approximately $2,143/year (sedan-luxury class). Actual quotes vary heavily by state, driver age, driving record, and credit — see the interactive insurance estimator on this page for state-specific pricing.

2018 Bmw 740I

Problems, Recalls & Reliability Report

Above Average

Quick Summary

The 2018 Bmw 740I has 6 owner complaints filed with NHTSA — that's 0.5x the segment average of 11. The most common issue is engine problems (33% of all complaints), specifically: apparently bmw models like mine have been having the coolant expansion tanks leaking between 60 and 70 thousand miles. this causes the coolant levels to drop and causes engine failures..

Total Complaints

Recalls Issued

—/5

Safety Stars

0.5x

vs Segment Avg

Known Problems(top 4 of 4)

ENGINE

2 complaints

33%

• Apparently BMW models like mine have been having the coolant expansion tanks leaking between 60 and 70 thousand miles. This causes the coolant levels to drop and causes engine failures.
• Oil pressure pump failure. MANY MODELS AFFECTED. MAINLY B58 ENGINES

Typical onset: 50K miles Est. repair: $500

“Apparently BMW models like mine have been having the coolant expansion tanks leaking between 60 and 70 thousand miles. This causes the coolant levels to drop and causes engine failures.”

— NHTSA complaint filing

Fuel Cost Calculator for 2018 Bmw 740I

Live EIA prices

Annual miles driven: 12,000

Your state (affects local gasoline price)

Per year

$2,001

Per month

$167

Per mile

16.7¢

MPG

City driving (worst-case MPG)

$2,286/yr

Highway driving (best-case MPG)

$1,656/yr

Based on EPA fuel-economy ratings and EIA weekly retail prices (2026-07-20). Real-world cost varies with driving style, trim/engine, terrain, and traffic.

5-Year Gas Price History

EIA weekly retail data · 2021 → today

Show:

Current

$4.00

5-year low

$2.78

5-year high

$5.01

Since 2021

+27%

Source: US Energy Information Administration weekly retail gasoline prices.

Estimated Insurance Cost for 2018 Bmw 740I

Estimate only, not a quote. Modeled from NAIC + HLDI averages for a hypothetical 35-year-old driver with clean record + full coverage. Your actual quote depends heavily on your age, driving history, credit, ZIP code, and insurer.

Your state (affects local premium average)

Full coverage / year

$2,143

Full coverage / month

$179

Liability only / year

$710

vs US avg

+28%

How this estimate is calculated

US base full-coverage premium$1674

× state (US)1.00x

× vehicle class (sedan-luxury)1.28x

× theft risk1.00x

× safety rating1.00x

× vehicle age1.00x

= Full coverage estimate$2143

Coverage assumed: 100/300/100 liability + comprehensive/collision, $500 deductibles. Data sources: NAIC 2024 + HLDI loss studies.

Maintenance & Warranty

Recommended Bmw 740I Service Intervals

Oil change

10K mi / 12 mo

Tire rotation

10K mi

Brake fluid

24 months

Transmission fluid

60K mi

Engine coolant

100K mi

Spark plugs

60K mi

Cabin air filter

15K mi

Engine air filter

30K mi

Differential (AWD/4WD)

60K mi

Condition-Based Service (CBS) tells you exactly when service is due. Transmission fluid was labeled 'lifetime' but many owners service at 60K-100K.

"Severe service" conditions (heavy towing, extreme temps, city stop-and-go) typically halve these intervals. Always consult your vehicle's owner's manual for the authoritative schedule.

Bmw New-Vehicle Warranty Coverage

Bumper-to-bumper (basic)

4 yr / 50K mi

Powertrain

4 yr / 50K mi

Hybrid/EV battery

8 yr / 100K mi

Corrosion (rust perforation)

12 yr / unlimited mi

Roadside assistance

4 yr / unlimited mi

Corrosion is unlimited miles for 12 years

These are the terms for a new Bmw. If you're buying a used 2018 740I, remaining coverage is usually pro-rated from the vehicle's original in-service date. Not all coverage transfers between owners — check with a Bmw dealer for VIN-specific remaining warranty.

Estimated Repair Costs

ENGINE(~50K mi)

$500

SUSPENSION(~50K mi)

$500

ELECTRICAL(~50K mi)

$500

SEATS/RESTRAINTS(~50K mi)

$500

Estimates based on average reported repair costs. Actual costs vary by location, shop, and severity.

🔍 Pre-Purchase Inspection Checklist

Based on 6 owner complaints for this specific year, here's what to check or ask about:

☐
ENGINE: Apparently BMW models like mine have been having the coolant expansion tanks leaking between 60 and 70 thousand miles. This causes the coolant levels to drop and causes engine failures.
Typically appears around 50K miles. Repair cost ~$500
☐
SUSPENSION: The contact owns a 2018 BMW 740i. The contact stated when he was starting his vehicle a warning for "chassis" was illuminated. The contact stated that the vehicle was leaning. The contact stated that the driver side of the vehicle was raised from the road by about 4 inches and the passenger side of
Typically appears around 50K miles. Repair cost ~$500
☐
ELECTRICAL: Dashboard display randomly flickers and blinks while driving Seatbelt notification chime rings even when the passenger seat is empty.
Typically appears around 50K miles. Repair cost ~$500
☐
SEATS/RESTRAINTS: Dashboard display randomly flickers and blinks while driving Seatbelt notification chime rings even when the passenger seat is empty.
Typically appears around 50K miles. Repair cost ~$500
☐
General: Get a pre-purchase inspection from an independent mechanic ($100-$200)