Should I check the MOT history before buying a 2018 BMW 340i?

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 340i?

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 340i?

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 340i?

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 340i (2018)

210 real MOT outcomes analysed • 93.7% first-time pass rate

2018 BMW 340i

CarHunch analysed 210 real MOT records for the 2018 BMW 340i. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.

Average reliability 13.7% above UK average

93.7%

pass MOT first time

UK average: ~80%

33,363

typical mileage

23,753–43,128 middle half

16.2%

ever had a dangerous defect

recorded at any MOT

0.4

avg MOT failures per car

over 5.5 tests on record

What to check before buying a 2018 BMW 340i

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 340i

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 →

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Mileage Distribution

Most 2018 BMW 340i 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.

23,753

low mileage

33,363

typical

43,128

high mileage

Half of all 2018 BMW 340i vehicles fall between 23,753 and 43,128 miles.

2018 BMW 340i — Still on the Road

Strong survival — 204 vehicles still getting MOTs in 2025, 100% 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

5.5

Avg MOT tests per vehicle

0.4

Avg failures per vehicle

3.1

Avg advisories per vehicle

Most Common MOT Issues — 2018 BMW 340i

Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.

24.1%

Nearside Rear Tyre worn close to legal limit/worn on edge
24.1%

COVID-19 6 MONTH EXTENSION
22.5%

Offside Rear Tyre worn close to legal limit/worn on edge
18%

Offside Front Tyre worn close to legal limit/worn on edge
17.8%

Nearside Front Tyre worn close to legal limit/worn on edge
14.7%

Rear Brake pad(s) wearing thin
13.7%

Nearside Rear Child Seat fitted not allowing full inspection of adult belt ()
10.4%

Front Brake pad(s) wearing thin

Data covers a 3-year window centred on 2018. Counts include advisories and failures.

Found a specific BMW 340i?

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

Other model years — BMW 340i:

2016 2017