Should I check the MOT history before buying a 2018 BMW 6 Series?

Yes. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. A full MOT history analysis will highlight patterns that a single test result won't reveal.

What corrosion should I look for when inspecting a 2018 BMW 6 Series?

Check brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that is expensive to fix and can fail an MOT.

How are tyres and brakes typically on a 2018 BMW 6 Series?

Tyres and brakes are the most common advisory items on vehicles of this age. Budget for replacement if they are near the limit, and factor this into your offer price.

Do I need an HPI check when buying a 2018 BMW 6 Series?

Yes. The MOT history will not show outstanding finance, insurance write-offs, or stolen status. An HPI check covers these areas and should be part of any used car purchase.

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BMW 6 Series (2018)

1,649 real MOT outcomes analysed • 91.4% first-time pass rate

2018 BMW 6 Series

CarHunch analysed 1,649 real MOT records for the 2018 BMW 6 Series. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.

Average reliability 11.4% above UK average

91.4%

pass MOT first time

UK average: ~80%

46,317

typical mileage

35,309–58,846 middle half

19.7%

ever had a dangerous defect

recorded at any MOT

0.58

avg MOT failures per car

over 5.7 tests on record

Petrol vs Diesel

Pass rate difference of 1.7 percentage points — worth knowing if you're choosing between the two.

92.5%

Petrol

561 vehicles

90.8%

Diesel

1,088 vehicles

What to check before buying a 2018 BMW 6 Series

Practical pre-purchase checks for this age and model.

📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.

Before you buy a BMW 6 Series

MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.

Inspection

Have a qualified mechanic check this car before you commit to buying →

CarHunch may earn a small commission if you buy via these links — at no extra cost to you.

Pass Rate by Fuel Type

Fuel type	Vehicles	Pass rate	Avg failures
Diesel (66%)	1,088	90.8%	0.62
Petrol (34%)	561	92.5%	0.5

Mileage Distribution

Most 2018 BMW 6 Series vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.

35,309

low mileage

46,317

typical

58,846

high mileage

Half of all 2018 BMW 6 Series vehicles fall between 35,309 and 58,846 miles.

2018 BMW 6 Series — Still on the Road

Strong survival — 1,553 vehicles still getting MOTs in 2025, 97% of the peak.

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2021–2025.

MOT History Averages

5.7

Avg MOT tests per vehicle

0.58

Avg failures per vehicle

3.5

Avg advisories per vehicle

Found a specific BMW 6 Series?

Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.

Other model years — BMW 6 Series:

1985 1986 2005 2006 2007 2008 2011 2012 2013 2017 2019 2020