AdBlue Issues – Diesel Models

Range Rover L405 diesel models from the 2016 model year on are all equipped with SCR technology, this is a filtration system that uses Urea (AdBlue) to neutralize harmful Nitrogen Oxide (NOx) emissions coming through the exhaust. This system can be quite sensitive and expensive to maintain, for example, if the system runs out of AdBlue, the car will become immobilised until the system is topped up, but if overfilled, the NOx sensors can sometimes fail.

The SCR system could also start using (dosing) too much AdBlue leading to increased consumption if there is a fault in the system such as contamination or a sensor failure. If you have noticed an increase in AdBlue consumption or any other unusual behavior from the SCR system, it is advised to get vehicle booked in for diagnostics.

Diagnosing SCR System – £73.20 inc. VAT Per Hour

NOx Sensor Replacement – £610 inc. VAT

DPF Failure – Diesel Models

Range Rover L405 diesel models are equipped with a Diesel Particulate Filter (DPF). The DPF system catches soot emitted from the exhaust and suspends it in a chamber until it can be burnt off in a DPF regeneration. Regeneration occurs passively when the vehicle is run up to temperature at high speed.

If the vehicle isn’t used for long runs at motorway speeds at least every few weeks, the DPF will fill up and an active regeneration will take place, this is where extra fuel is injected into the engine to artificially raise the combustion temperature. Some owners may not realise this is happening and could switch the vehicle off before a regeneration is completed, meaning the system will still be blocked. This can cause the red DPF warning light to appear on the dash along with the message “Exhaust Filter Full Visit Dealer”.

We regularly see this problem and if diagnostics do not reveal any failed sensors we try to force a regeneration using our Autologic systems before proceeding to manually cleaning the DPF. Unfortunately though, sometimes an expensive new DPF will be the only option.

DPF Diagnostics – £73.20 inc. VAT Per Hour

Force DPF Regeneration – £110 inc. VAT

Manual DPF Clean & Regeneration – £300 inc. VAT

Replace Diesel Particulate Filter (DPF) – P.O.A

To read more on DPF systems, please take a look at our article on DPF Maintenance.

Turbocharger Replacement – Diesel Models

Turbos can fail on all diesel Range Rovers. Total failure can be quite easy to spot, you are likely to experience a loss of power along with an engine management light and there will no longer be any boost when accelerating.

If a failure is caused by an oil leak on the turbo unit itself and that leak makes its way to the exhaust system, there will be a large amount of blue smoke coming out the exhaust, the level of smoke will likely increase under acceleration as this will cause the turbocharger to spool up.

Sometimes, a failing turbocharger will give advanced warning of failure, you might hear a siren like whining or whistling noise that gets progressively worse and louder as you accelerate. This warning should be taken as a clear message that it’s time to book your Range Rover in for repairs!

Replacement is often not as simple as removal and fitment of a new part, because any contamination could potentially cause the new turbo to fail shortly after installation, because of this, when installing new turbos, K Motors will perform a full engine flush and we will recommend replacement of parts which we feel are at risk of contamination including intercoolers, feed pipes and filter screens.

Replace Turbocharger Unit Only | 3.0 Diesel – Prices Start From P.O.A

Replace Turbocharger Unit Only | 4.4 V8 Diesel – Prices Start From P.O.A

To learn more about turbocharger issues on Jaguar and Land Rover vehicles, please take a look at our full article on turbochargers.

Front Anti Roll Bar Bushes

Anti-roll bars, (also known as stabiliser bars) help to keep a vehicle level when cornering, they have two rubber bushes around them (commonly referred to as D bushes), these are held by a clamp bolted to the subframe. The D bushes tend to wear over time and your steering will start to feel ‘woolly’, and lack responsiveness.

You may notice a clunk when cornering as the rubber can no longer support the roll bar under load. It may also feel like the vehicle is moving or jumping further opposite to the direction that you are turning, these are all signs that the anti-roll bar bushes are worn and need replacing.

Replace Both Anti-Roll Bar Bushes – £291 inc. VAT

Front Suspension Tie Bars

The front suspension tie bars (also known as drop links) are the small rods with a ball joint on either end that connect the upper suspension arm to the front anti-roll bar to help keep the vehicle stable and prevent oversteer. Perhaps one of the most common knocking noises heard on Range Rovers, drop link failure is often associated with a light metal rattle heard when travelling over speed bumps, potholes or other undulations in the road.

Replacement of the drop links is a simple task, however it is common for the nut, thread and key fitting on the ball joint ends to be corroded and in poor condition making them very difficult to remove.

Replace 1x Front Suspension Drop Link (OEM) – £118 inc. VAT

Front Suspension Arms

We are regularly replacing the front lower suspension arms on Range Rovers in our workshop. These often go undetected until excess play is found in the the lower suspension bushes on an MOT. Whilst replacing the failed bushings is technically possible, it is much easier to just replace the complete arm as it is very difficult to remove the worn bush and press in a new one perfectly straight.

Once new arms have been fitted it is important to perform a full 4 wheel alignment (checking both toe and camber) otherwise you will find your Range Rover is pulling to one side, crab walking on full lock or is wearing out tyres at an alarming rate.

The main symptom of lower arm/bushing failure is a clonking/knocking sound from the front suspension, mostly noticeable at low speed, a quick way to verify the arms are the issue is to is to drive the vehicle forwards and backward very slowly and apply the foot brake. If you hear a clonk as soon as the brakes are applied then it is very likely to be worn lower suspension arm bushes.

Replace Front Lower “Curved” Suspension Arm (OEM) – £258 inc. VAT

Replace Front Lower “Straight” Suspension Arm (OEM) – From £210 inc. VAT

Front Hub And Bearing

Bearing failure is not uncommon on the L405 Range Rover vehicles. Front wheel bearing failure can generally be identified by a grinding or rumbling noise on a front corner that often gets worse when turning or when travelling faster. To verify bearing failure, jack up the wheel in question and feel for play by rocking the wheel from top to bottom. If you can feel movement then the hub and bearing need to be replaced. The wheel may also feel and sound rough when rotated.

It is important to replace failing wheel bearings before complete failure as the wheel may separate from the vehicle!

Replace Complete Front Hub And Bearing – P.O.A

Range Rover L405 Air Suspension Faults

4-wheel air suspension on the Range Rover has always helped set it apart from rivals, however, it is a complex system and faults are well known at this point.

Most Range Rover air suspension faults have the same symptoms and the L405 is no different, the warning is a yellow or red light in the shape of a car with an arrow over the top of it and it will show on the dashboard info screen with various different fault messages below. Selecting different height options may be unavailable and the vehicle may sit lower.

Symptoms could be one or more corners will not raise, the vehicle may be slow to raise and may only go to standard ride height and will not go in off road or access mode. The same symptoms and warnings can be caused by any of the following issues listed below. We would always advise a full diagnostic check and calibration to narrow down the cause before removing or changing any parts.

Diagnostics – £73.20 inc. VAT Per Hour

Suspension Calibration – £73.20 inc. VAT

Replace Air Suspension Compressor (OEM) – P.O.A

Replace Suspension Compressor (Genuine LR) – P.O.A

Replace 1x Air Suspension Height Sensor (OEM) – P.O.A

Replace Air Suspension Valve Front (Genuine LR) – P.O.A

Replace Air Suspension Valve Rear (Genuine LR) – P.O.A

Replace Air Suspension Reservoir Tank (OEM) – P.O.A

Suspension Strut And Air Bag

If the vehicle suspension will not raise over one wheel and height sensors, valves and all the other faults listed above have been ruled out then it is likely to be a split or leak in the suspension air bag.

Rear suspension air bags are not mounted to the shock absorber and can be replaced seperately, unfortunately, this is not the case with the front struts, they come as a complete unit.

Replace 1x Front Suspension Strut And Air Bag (OEM) – P.O.A

Replace 1x Rear Suspension Air Bag (OEM) – P.O.A

Replace 1x Rear Suspension Strut And Air Bag (OEM) – P.O.A

Rear Wheel Hub And Bearing

A grinding or rumbling noise at a rear corner that gets worse the faster you travel often indicates a worn rear wheel bearing. To verify, jack up the wheel making the noise and feel for play by rocking it from top to bottom and turn the wheel. If there is any excess movement or roughness when turning then both the hub and bearing need to be replaced.

It is important to replace failing wheel bearings before complete failure as the wheel may separate from the vehicle!

Replace complete hub and bearing (SNR) – £375 inc. VAT

Brake Discs and Pads

Range Rovers are well known for wearing out brake discs and pads due their high power and weight. If low brake pads are spotted early enough before any damage is caused to the disc then just the pads can be changed. If brake pads have worn low enough to score the discs then it is advisable to change both for optimum performance.

The average life of brake discs on Range Rovers is around 32,000 miles after this they are likely to be considered too thin and will have a lip around the edge where just fitting new pads will take too long to bed in and most likely will make a squealing sound each time you apply the brakes. Once the pad level warning light has come on it is generally too late and the discs will need to be changed as well.

Replacement Pads & Fitting Kit – Front – Starting From £295 inc. VAT

Replacement Discs, Pads & Fitting Kit – Front – Starting From £495 inc. VAT

Replacement Pads – Rear – Starting From £272 inc. VAT

Replacement Discs & Pads – Rear – Starting From £413 inc. VAT

Door Lock Replacement

As with many Land Rover models, the door latches on the Range Rover L405 are prone to failure, You may find you cannot lock the vehicle or have activated the central locking but you are still able to open one of the doors. As all the parts of the mechanism are now one sealed unit the complete latch assembly will need replacing.

Replace Door Latch Mechanism (Genuine LR) – £285 inc. VAT

All prices include parts, fitting and VAT.
Final prices may vary depending on vehicle specification, sundries, additional parts required and part availability when using OEM.

For further advice on the above issues as well as anything else on your Range Rover L405, please phone our service department on 01772 299811 or email us at


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