A concern has been identified where on certain vehicles equipped with TDV6 3.0L Diesel and Ingenium I4 2.0L Diesel engines, when connected to a diagnostic scan tool during the California SMOG test, the Powertrain Control Module (PCM) incorrectly reports the monitor readiness status as 'not supported'. A software update to the PCM is needed.
full bulletin at NHTSA ↗2018 Land Rover Discovery engine problems
moderate 3 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Complaints
3
Recalls
0
Avg fix
$3,100
When does it fail?
Of the 3 engine complaints filed for the 2018 Land Rover Discovery, here's the actual mileage breakdown — failures cluster heaviest at 100,000-125,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
After thermostat replacement, the instrument cluster says that the engine is overheating while driving.
full bulletin at NHTSA ↗Coolant Low Warning Message Displayed On The Instrument Panel Cluster
full bulletin at NHTSA ↗Engine knocking noise post service engine replacement - incorrect fuel injector installation.
full bulletin at NHTSA ↗Coolant Low Warning Message Displayed On The Instrument Panel Cluster
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 2 most recent
The contact owns a 2018 Land Rover Discovery. The contact stated while driving at an undisclosed speed, the check engine warning light remained illuminated. The vehicle was taken to the local mechanic and the engine sensor was replaced; however, the failure persisted. The vehicle was taken back to the to the local mechanic who diagnosed the vehicle and determined that the engine needed to be…
Low coolant warning came on. Topped off coolant with no leak visible under vehicle. Warning came back a week later. And leak was now visible. Vehicle towed to dealer and discovered bad water pump and hoses. Dealer cannot fix vehicle for last 5 weeks due to back ordered heater manifold tube. Under 45k miles and unusable. Dealer advised leak on belts requires them to be replaced. No global ETA on…
Had engine trouble with your 2018 Land Rover Discovery?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2018 Land Rover Discovery?
It's a documented issue but not catastrophic. 3 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Based on the 3 complaints filed, engine issues most often appear around 110,000 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2018/Land Rover/Discovery.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.