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.

Is the 2018 BMW 340i reliable?

Based on MOT data from 210 vehicles, the 2018 BMW 340i has a first-time MOT pass rate of 93.7%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2018 BMW 340i?

The most frequently recorded MOT issues on the 2018 BMW 340i are: COVID-19 6 MONTH EXTENSION (24.1% of vehicles), Nearside Rear Tyre worn close to legal limit/worn on edge (24.1% of vehicles), Offside Rear Tyre worn close to legal limit/worn on edge (22.5% of vehicles). These figures are based on actual MOT test records — search a specific registration on CarHunch to see its individual history.

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. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
Which year to buy? →

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AI Analysis Reliability Overview Common Issues Check a Specific Reg Buyer's Checklist Mileage Distribution Still on the Road MOT Averages Colour Breakdown Compare Models

The 2018 BMW 340i is a reliable performer by UK standards, with a first-time pass rate of 93.7% well above the national average of 80%, and only 16.2% of vehicles ever flagged for dangerous defects—a manageable concern rather than a red flag. This is a well-maintained cohort that's had relatively few serious problems.

At just over 33,000 miles median mileage, these cars are still relatively young and lightly used, which explains the strong pass rate and low failure count of 0.4 per vehicle. The average of 3.1 advisories per test suggests minor wear items (suspension, trim, wear sensors) are cropping up, so budget for small maintenance jobs as the car ages, and have any prospective purchase inspected by a BMW-specialist mechanic to catch advisory-level issues before they become expensive.

We have limited data for the 2018 BMW 340i — treat the figures below as indicative rather than definitive.

⚠️ Around 1 in 8 of these vehicles have had a dangerous MOT failure at some point — usually tyres or brakes, and often a one-off issue rather than a persistent problem. The group stats won't tell you which one you're looking at.

First-time pass

93.7%

UK average ~80%

Better than average

Dangerous (ever)

16.2%

At least once in MOT history

Check this vehicle

Avg failures / car

0.4

Over 5.5 tests on record

Low

Typical mileage

33k

Middle half: 24k–43k

For context

These stats describe 210 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.

Average reliability — agree?

What tends to go wrong

Across 210 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 24.1%

Nearside Rear Tyre worn close to legal limit/worn on edge · Offside Rear Tyre worn close to legal limit/worn on edge · Offside Front Tyre worn close to legal limit/worn on edge · …

Budget for a full set — on a vehicle this age, tyres are expected consumables. An inspection will confirm how much is left.

Other issues 24.1%

COVID-19 6 MONTH EXTENSION · Nearside Rear Child Seat fitted not allowing full inspection of adult belt · Windscreen damaged but not adversely affecting driver's view · …

Brake wear 14.7%

Rear Brake pad(s) wearing thin · Front Brake pad(s) wearing thin · Front Brake disc worn, pitted or scored, but not seriously weakened

Ask the seller when brakes were last serviced. If they don't know, factor in the cost.

Suspension & steering 4.8%

Nearside Front Shock absorbers has light misting of oil

Harder to spot without a ramp — this is a good reason to book a pre-purchase inspection.

Data covers a 3-year window centred on 2018.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 210 BMW 340i cars.

Before you buy a 2018 BMW 340i

Based on MOT data from 210 vehicles — here's what to check.

📋 Check the full MOT history. 16.2% of these vehicles have had a dangerous defect recorded - recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle.
🔍 Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price. Inspection →
📄 Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically. History Get 20% off via CarHunch

Colour Breakdown

Based on 946 BMW 340i vehicles registered in the UK — across all years. From DVLA registration records.

Grey 24.8%

235

Blue 24.2%

229

Black 23%

218

White 11.4%

108

Silver 8.8%

Red 4.1%

Orange 2.2%

Beige 0.8%

Purple 0.5%

Mileage Distribution

Most 2018 BMW 340i vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.

33,363

typical

23,753

low mileage

43,128

high mileage

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

Is the mileage you're seeing normal?

✓ Under 23,753 miles — lower than most. Could be great, or could be a vehicle that rarely moved. Check test frequency and mileage progression in the MOT history.

✓ 23,753–43,128 miles — normal for age. This is where most 2018 BMW 340is sit.

⚠ Over 58,222 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2018 BMW 340i — Still on the Road

Almost all 2018 BMW 340is are 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

Other model years — BMW 340i: All 340i years → Which year to buy? →

2016 2017

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Compare with another model

See how the 2018 BMW 340i stacks up against a rival.

Average reliability — agree?