Model Reports 4 min read Updated 18 Oct 2026

Land Rover Defender 2015: reliability & common MOT faults

In 2025, 79 in every 100 first MOTs on a 2015 Land Rover Defender were passes. Most common reason for a fail: Individual sidelight or tail light (front).

Summary

The 2015 Land Rover Defender follows the pattern of the model years either side.

At a glance

How 6,269 first tests went in 2025.

Passed first time
79 in every 100
Did not pass first time
21 in every 1001,330 failed first-attempt tests
The typical car
10 yearsabout 46,549 miles
First tests counted
6,269

What failed most often

  1. Individual sidelight or tail light (front)15 in every 100 failed tests
  2. Shock absorbers (rear)12 in every 100 failed tests
  3. Headlight aim11 in every 100 failed tests

How we count this. Data: UK MOT open data, 2025. Only Class 4 cars on their first MOT of the year are counted. A car that fails and is fixed at the test station still counts as a fail in the first-attempt rate. These are raw results, not adjusted for age, mileage, or peer mix. The MOT does not test engine or gearbox internals.

Note:

These are patterns across 2015 Land Rover Defender vehicles in 2025, not a prediction that any one car will have them. Faults are grouped by part of the car. A wear pattern follows age and use more than the way the car was built. They come from MOT defect codes, not manufacturer bulletins, recalls or a diagnosis of any one car.

Seat belts and restraints

One fault: seat belt condition (front), 16 times as often as on similar cars.

Figures below are measured across the 1,328 of 1,330 failed first attempts (99.8%) that recorded an odometer reading in 2025. Mileage is needed to compare like with like.

We only list faults with at least 20 failures and a rate of about 2.0 times that of similar cars, which keeps one-off results out of the list.

Seat belt condition (front)

Failed on 48 first tests16 times as often as similar carsLikely evidence

What it means

Any sign of overstretching is a deficiency, and so is a cut anywhere on a child seat belt. On other belts the size of a cut decides it, with a stricter limit at the webbing edge than away from it. Webbing significantly stretched or weakened has rows in both Major and Dangerous grades.

Also noted as an advisory

Testers also noted it as an advisory, worn but not yet failing, on 143 first tests, 25 times as often as on similar cars.

Data: UK MOT open data, 2025. Compared with cars of the same age and mileage. Advisories count notes recorded on failed first tests only.

Brakes

Two faults. The strongest is the rigid brake pipes (front): 12 times as often as on similar cars.

Rigid brake pipes (front)

Failed on 75 first tests12 times as often as similar carsLikely evidence

What it means

Chafing, corrosion or damage to a rigid brake pipe justifies rejection once its wall thickness is reduced by a set amount, although DVSA accepts this is not easy to determine. If a tester is not sure, the benefit of the doubt applies. A leaking pipe or connection is graded Dangerous on a hydraulic system and Major on an air system.

Also noted as an advisory

Testers also noted it as an advisory, worn but not yet failing, on 141 first tests, 7.3 times as often as on similar cars.

Rigid brake pipes (rear)

Failed on 68 first tests7.7 times as often as similar carsLikely evidence

What it means

Chafing, corrosion or damage to a rigid brake pipe justifies rejection once its wall thickness is reduced by a set amount, although DVSA accepts this is not easy to determine. If a tester is not sure, the benefit of the doubt applies. A leaking pipe or connection is graded Dangerous on a hydraulic system and Major on an air system.

Also noted as an advisory

Testers also noted it as an advisory, worn but not yet failing, on 78 first tests, 3.3 times as often as on similar cars.

Data: UK MOT open data, 2025. Compared with cars of the same age and mileage. Advisories count notes recorded on failed first tests only.

Suspension

One fault: shock absorbers (rear), 6.5 times as often as on similar cars.

Shock absorbers (rear)

Failed on 155 first tests6.5 times as often as similar carsStrong evidence

What it means

Slight seepage that leaves a film of fluid on a shock absorber does not fail it. Severe leakage, or damage so that it does not function, is Major. A shock absorber missing or likely to become detached is graded Dangerous, though a missing one is only rejected if shock absorbers were fitted as standard.

Also noted as an advisory

Testers also noted it as an advisory, worn but not yet failing, on 156 first tests, 5.5 times as often as on similar cars.

Data: UK MOT open data, 2025. Compared with cars of the same age and mileage. Advisories count notes recorded on failed first tests only.

Lamps and electrical

Five faults and one wear pattern. The strongest is the reversing lights: 6.3 times as often as on similar cars.

Reversing lights

Failed on 32 first tests6.3 times as often as similar carsLikely evidence

What it means

Reversing lamps must show a white light to the rear, and on some vehicles the engine has to be running before they work. A lamp that does not emit a steady white light, does not face the rear or has its light intensity significantly reduced is Major. A lamp not securely attached is Minor, but one likely to become detached is Major.

Individual sidelight or tail light (rear)

Failed on 73 first tests4.7 times as often as similar carsLikely evidence

What it means

A position lamp showing red light to the front or white light to the rear is Major. Rear lamps must show a steady red light, and front ones can show white, predominantly white with a blue tinge, or yellow if combined in a yellow headlamp. With a multiple light source, up to half not working is Minor and more than half is Major.

Individual sidelight or tail light (front)

Failed on 203 first tests4.2 times as often as similar carsLikely evidence

What it means

A position lamp showing red light to the front or white light to the rear is Major. Rear lamps must show a steady red light, and front ones can show white, predominantly white with a blue tinge, or yellow if combined in a yellow headlamp. With a multiple light source, up to half not working is Minor and more than half is Major.

Brake light

Failed on 104 first tests2.5 times as often as similar carsPossible evidence

What it means

All stop lamps missing or not working is graded Dangerous, and so is a stop lamp that stays on when the brakes are released. A stop lamp that is missing or not working is Major. On some vehicles with LED rear lamps, part of the stop lamp can go out when the rear fog lamp is lit, which is not regarded as a defect.

Headlight aim

Failed on 152 first tests2.4 times as often as similar carsWear pattern

What it means

Beam aim too high, too low or off to either side is Major. Where a driver's beam aim control is fitted, the aim is tested without altering the setting, and rechecked at the highest setting only if it would fail for being too low. Masks or converter kits on right hand dip headlamps are acceptable.

Number plate lights (rear)

Failed on 52 first tests2.1 times as often as similar carsPossible evidence

What it means

Registration plate lamps must light up the rear registration plate and operate at the same time as the position lamps. A missing or inoperative lamp is Major when the plate has only one lamp or all its lamps are not working, and Minor when the plate has several lamps or light sources and not all have failed. A lamp throwing direct white light to the rear is also Minor.

Data: UK MOT open data, 2025. Compared with cars of the same age and mileage.

Advisories

Other things testers noted as worn or close to failing, more often than on similar cars.

An advisory is a note from the tester about something that has not failed yet. It is an early warning, not a fail. Advisories for the faults above are shown with those faults.

Anti-roll bar linkage pins and bushes (rear)

Noted on 23 first tests33 times as often as similar carsElevated evidence

Anti-roll bar pins and bushes (rear)

Noted on 21 first tests21 times as often as similar carsElevated evidence

Wheel bearings (rear)

Noted on 35 first tests12 times as often as similar carsElevated evidence

Wheel bearings (front)

Noted on 45 first tests8.0 times as often as similar carsElevated evidence

Transmission oil leaks (front)

Noted on 49 first tests7.6 times as often as similar carsElevated evidence

Data: UK MOT open data, 2025. Counts cover advisories recorded on failed first tests only, compared with cars of the same age and mileage.

MOT pass rates

How first tests ended, and how the pass rates are counted.

Passed first time
79in every 100
Passed on the first test.
Fixed at the station
6in every 100
Failed, then fixed at the test station the same day.
Failed
15in every 100
Did not pass, and were not fixed at the test station.

First-attempt pass 78.8% of 6,269 first tests (2025): only cars that passed first time count. Official-style pass 84.8%: cars fixed at the test station also count as a pass. The 6 fixed and the 15 not fixed make the 21 in every 100 that did not pass first time.

Same model, other years

Passed first time in every 100, all tested in 2025.

4060801001985199019952000200520102015Older cars
4060801001990200020102015Older cars

Newer cars are younger, so look for a jump rather than the climb. A year earlier (2024), when these cars were a year younger, 80 in every 100 passed first time.

YearPassed first timeFirst tests
198472 in every 100425
198571 in every 1001,186
198668 in every 1001,630
198767 in every 1001,517
198865 in every 1001,395
198968 in every 1001,750
199068 in every 1001,520
199165 in every 1001,585
199265 in every 1001,367
199366 in every 1001,673
199463 in every 1002,099
199564 in every 1002,615
199665 in every 1003,132
199766 in every 1003,075
199864 in every 1003,149
199964 in every 1002,695
200064 in every 1002,705
200164 in every 1002,819
200265 in every 1003,505
200365 in every 1004,027
200464 in every 1003,936
200566 in every 1003,841
200666 in every 1003,488
200766 in every 1003,638
200868 in every 1003,433
200968 in every 1003,179
201068 in every 1003,642
201169 in every 1003,708
201271 in every 1003,640
201372 in every 1004,093
201476 in every 1005,513
2015 This car79 in every 1006,269
201683 in every 1001,702

If you are buying one

What this year's MOT record means for the decision in front of you.

Mileage matters most on a 2015 Defender.

Of 2015 Defender vehicles with under 24,000 miles, 90 in every 100 passed their 2025 MOT first time. With 78,000 miles or more, 67 in every 100 did.

Under 24,0001,235 tests
90
24,000–39,0001,262 tests
84
39,000–55,000 Typical car1,288 tests
78
55,000–78,0001,241 tests
75
78,000 and over1,241 tests
67

What to check at your mileage

How often each fault turned up on a failed first test, by the car's mileage. Read it as: what is likely to need looking at on a car like the one in front of you.

Under 24,00039,000–55,00078,000 and over
Individual sidelight or tail light (front)0.64.34.9
Shock absorbers (rear)0.32.65.2
Headlight aim1.52.93.7
Brake light0.62.12.4
Windscreen washers0.52.12.3

Faults per 100 first tests, by the car's mileage at the test.

When a car fails

32in every 100

of failed cars had one item to fix.

41in every 100

of failed cars had three or more items to fix.

4in every 100

of all first tests had a defect the tester marked dangerous (unsafe to drive away).

Every figure here is a first-attempt MOT rate from DVSA open data for this model line, for cars of this model year tested in 2025. Each mileage band holds a fifth of the tests. MOTs do not test engine or gearbox internals, so this is a pre-purchase checklist, not a full reliability score.

FAQs

Short answers about how to read this model-year guide.

The 2015 Land Rover Defender follows the pattern of the model years either side. Its main cause of failure was Individual sidelight or tail light (front), about 15 in every 100 failed tests. In 2025, 78.8% of 6,269 first MOTs on the 2015 Land Rover Defender passed first time (PRS: items fixed at the station the same day, counted as a fail). The official-style rate including PRS is 84.8%. Among 1,330 failed first-attempt MOT tests (test year 2025), Shock absorbers (rear) appears more often than on similar cars (11.7% of those tests; 155 observed failures; about 6.5× more often than similar cars). There is no single reliability score here; this is a pre-purchase checklist built from DVSA open data, not a guarantee for any individual car.
Ranked by how often they were actually recorded, the items that most often failed a 2015 Land Rover Defender at the first attempt were Individual sidelight or tail light (front) (15.3%), Shock absorbers (rear) (11.7%) and Headlight aim (11.4%), each as a share of the year's failed first attempts. That is what goes wrong most often on the car. The common faults table shows a different measure: faults that are unusual compared with similar cars.
Among failed first-attempt tests we highlight patterns that appear more often than on similar cars. Top example: Shock absorbers (rear) (11.7% of those tests; 155 observed failures; about 6.5× more often than similar cars). These are statistical signals, not a diagnosis of any individual car.
Shock absorbers (rear) shows up more often than on similar cars (11.7% of those tests; 155 observed failures; about 6.5× more often than similar cars). That does not prove a design fault. Age, mileage, and how the car was used still matter. Treat it as a pre-purchase checkpoint, not a manufacturer service bulletin.
Common MOT problem areas for the 2015 Land Rover Defender include Shock absorbers (rear), Seat belt condition (front), Rigid brake pipes (front). These are the faults that stand out compared with similar cars, not a complete list of what can go wrong on any individual car.
Advisories flag issues noted at the test and are not a fail rate. We show advisory patterns that appear more often than on similar cars among failed first-attempt tests, separate from common failure rows. Use them as early-warning checks, not as a pass/fail score.
This page highlights MOT failure patterns for the 2015 Land Rover Defender (registration year) using UK DVSA open data for the selected test year. Patterns are compared with cars of a similar age and mileage. It is a buyer checklist from MOT defect statistics, not a full service history or manufacturer service-bulletin list.
No. MOT tests do not cover engine internals, gearboxes, or many electronic modules. Patterns here come from MOT defect statistics only and should not be read as engine or gearbox reliability scores.

About this data

How this page is built and what it can (and can't) say.

These figures come from UK MOT open data for this model year. We surface common failure patterns against similar cars, not a full reliability score, and not a pass/fail verdict on any individual vehicle.

2024 2025

What we include

UK Class 4 cars only. Normal MOT tests (not retests); first test per vehicle per calendar year; results pass, PRS, or fail.

Same-day repairs

PRS means the car failed items that were fixed at the test station and then passed the same day. We count PRS as a first-attempt fail in headline rates so same-day repairs do not hide problems.

How we compare

We compare this model year with other Class 4 cars of similar age and mileage in the same test year. This model family is left out of the peer group so the car is not measured against itself.

What this does not cover

  • MOTs do not cover engine internals, gearboxes, or many electronics; this is not a full reliability score.
  • Common faults come from MOT defect stats, not manufacturer TSBs or recalls.
  • Age and mileage matching reduces, but does not remove, differences in how cars were used and maintained.
  • If the data for a car is too thin to say anything useful, we say so rather than guess.

Contains public sector information licensed under the Open Government Licence v3.0.

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