Land Rover Discovery 5 MOT Failures: The Most Common Issues & How to Fix Them

The Land Rover Discovery 5 (L462) has been on UK roads since 2017, and the earliest examples are now well into their MOT years. Based on DVSA anonymised test data from over 276,000 Discovery MOT tests, we break down exactly what's failing, why, and which parts you need to fix it.

Discovery 5 MOT Pass Rate

The Discovery sits at around 80% MOT pass rate across all generations. Discovery 5 models perform better than the average thanks to their aluminium monocoque construction (far less corrosion than the older Discovery 3 and 4), but they bring their own set of challenges — particularly around suspension, brakes, and diesel emissions systems.

Pass rates drop around 6 percentage points by the time the manufacturer warranty expires — which is exactly when owners start looking for affordable replacement parts.

1. Suspension Failures — The #1 MOT Issue

Suspension is the single biggest reason Discovery 5s fail their MOT, accounting for nearly 58% of all failure items recorded. The Discovery 5 weighs over 2.2 tonnes, and that mass takes a serious toll on front-end components.

What Fails

• Suspension pin, bush or joint excessively worn — the most common individual MOT failure across all Discoverys, with 14,837 recorded failures
• Suspension joint dust cover missing or deteriorated — 2,922 failures
• Front lower arm bushes — worn bushings cause a noticeable clonking noise at low speed, especially under braking
• Anti-roll bar D-bushes — perished rubber creates a vague steering feel and clunking through corners
• Drop links (front tie bars) — worn ball joints produce a metallic rattle over small bumps

What You Need

Tip: A 4-wheel alignment is recommended after replacing any front suspension arms — misalignment alone can cause an MOT failure and accelerated tyre wear.

2. Air Suspension Problems

The Discovery 5's electronic air suspension is one of its defining features — and one of its most expensive failure points. While air suspension faults don't always trigger an immediate MOT fail, a visibly sagging corner, uneven ride height, or a suspension warning light will.

Common Symptoms

• Vehicle sitting low on one corner or not levelling on startup
• "Suspension Fault" warning on the dashboard
• Compressor running constantly or not at all
• Inability to reach off-road ride height

What Fails

• Air springs (bags) — rubber bellows become porous over time and leak, particularly the rears
• Air suspension compressor — overworks to compensate for leaking bags, eventually burns out
• Height sensors — corrode or fail, sending incorrect readings to the ECU
• Valve block — internal seal failure causes air to bleed between corners

What You Need

3. Brake Wear — Faster Than You'd Expect

Brakes account for 65% of recorded failure items on the Discovery. The sheer weight of the vehicle means pads and discs wear significantly faster than on lighter SUVs — expect around 32,000 miles from a set of pads.

What Fails

• Brake pads worn below 1.5mm — 3,336 MOT failures recorded
• Brake pipe damaged or excessively corroded — 4,948 failures (the second most common individual item)
• Brake discs scored or worn — often caused by running pads down to the metal backing plate

What You Need

Tip: Always replace brake wear sensors when fitting new pads — they're a one-use item and a missing or faulty sensor can trigger dashboard warnings.

4. Tyre Issues

Three tyre-related items appear in the top 10 Discovery MOT failures. Tyres account for 44% of all failure items, and with the Discovery 5's weight and large wheel options (up to 22"), uneven or accelerated wear is common.

What Fails

• Tyre seriously damaged — 3,355 failures
• Tyre tread depth below legal limit
• Tyre cords exposed or sidewall damage

What You Need

Tip: TPMS sensor failure is common on the Discovery 5 and will cause an MOT advisory or fail. If a tyre warning light is on, check the sensors before assuming it's just pressure.

5. Lighting & Electrical Failures

Lighting problems make up nearly 35% of Discovery failure items. Three lighting-related faults sit in the top 10:

What Fails

• Rear registration plate lamp inoperative — 3,805 failures
• Lamp missing or >50% of light sources not functioning — 3,554 failures
• Headlamp aim not within limits — 3,437 failures (the self-levelling headlamp system on the Discovery 5 is linked to the air suspension — a suspension fault can knock headlamp aim out of spec)

What You Need

6. Emissions, Exhaust & Engine Management

For diesel Discovery 5s — which make up the vast majority on UK roads — emissions-related faults are a growing MOT concern. The 2.0 Ingenium and 3.0 TDV6 diesels both have well-documented issues.

What Fails

• DPF blockage — short journeys prevent regeneration; triggers "Exhaust Filter Full" warning
• Throttle body clogging (3.0 diesel) — prevents DPF regen and causes "Restricted Performance" mode
• EGR valve failure — sticking or blocked EGR valves affect emissions readings
• AdBlue / NOx sensor faults — the SCR system is sensitive; a failed NOx sensor alone is ~£600
• Lambda sensor degradation — gives incorrect readings, pushing the car outside emissions limits

What You Need

7. Windscreen Washers & Visibility

Visibility items account for a surprising number of MOT failures on the Discovery:

• Windscreen washers non-functional — blocked jets or failed pump
• Wiper blades worn or damaged

What You Need

8. Steering

Steering components contribute around 5,900 failure items in the Discovery dataset:

• Track rod ends worn — causes play in the steering detectable during the MOT
• Power steering hose leaks

What You Need

Beyond the MOT: Engine & Drivetrain Faults to Watch For

These won't necessarily show up on an MOT, but they're the faults that bring Discovery 5 owners into workshops — and they all need parts.

Timing Chain Failure (2.0 Ingenium Diesel)

This is the big one. Oil dilution from incomplete DPF regeneration cycles stretches the timing chain over time. If it jumps or snaps, the pistons hit the valves and the engine is destroyed. Symptoms include a rattling noise on cold start and "Restricted Performance" warnings.

Turbocharger Failure (2.0 & 3.0 Diesel)

Loss of power, engine management light, and blue smoke from the exhaust are the classic signs. When replacing the turbo, intercoolers and feed pipes should be inspected too.

Wheel Bearing Wear

Both front and rear hub bearings wear on the Discovery 5. A grinding or rumbling noise that worsens during turns (front) or increases with speed (rear) is the giveaway.

Cooling System Leaks

The supercharged V6 and V8 petrol models are prone to water pump failure and cracked plastic coolant pipes. The 2.0 diesel can suffer thermostat housing leaks that also damage the piston cooling jet solenoid.

Door Latch Failures

A known Discovery 5 issue — the central locking activates but one door can still be opened, or the vehicle won't lock at all. Requires replacement of the sealed latch assembly.

Keeping Your Discovery 5 on the Road

The Discovery 5 is a capable and comfortable vehicle, but its complexity and weight mean it needs regular attention. The good news is that most MOT failures are caused by wear items — suspension bushes, brake pads, tyres, and bulbs — that are straightforward to replace with the right parts.

Browse all Discovery 5 (L462) parts at myton.parts

We stock genuine, OEM, and aftermarket parts for every Discovery 5 system, with next-day UK delivery available.

Service & Maintenance Parts

Staying on top of regular servicing is the best way to prevent MOT failures and costly breakdowns. We stock complete service kits and individual filters for all Discovery 5 engine variants.

Data sourced from DVSA anonymised MOT test results (2024 test year). Statistics cover all Discovery generations tested; Discovery 5-specific fault analysis based on specialist workshop reporting.