Land Rover Oil Leak
Everything looked fine a few weeks earlier.
After a recent dealer inspection, Mr J’s Land Rover Discovery Sport showed no faults or warnings.
Then he noticed a small patch of oil under the car on his drive. It’s easy to miss, but impossible to ignore once you know what it means.
A minor oil leak can escalate quickly as heat and friction can worsen the damage, leaving you with an expensive repair bill – Which I think you’ll agree is the last thing you need, right?
When Mr J brought his Discovery Sport to CSN Autos, Wymondham, for its scheduled Land Rover service, he mentioned the oil patch to our team. Recognising the potential seriousness of the issue, our technicians made it a priority to investigate this before the service.
Our mission was clear: confirm the issue, locate the Land Rover oil leak origin, and stop further damage before it started.
Listening First: Finding the Source of the Land Rover Oil Leak
Good diagnostics start by listening.
Mr J told us when he’d first noticed the oil beneath his Discovery Sport and how often it appeared after each journey. These insights guide our technicians before any type of inspection begins.
With this information, our experts performed a brief visual check underneath, revealing light residue near the transmission – not enough to identify the cause, but enough to confirm an active leak.
Using our Land Rover-approved diagnostic equipment, our team performed a complete system scan. None were found, so our technicians continued with a thorough physical inspection to pinpoint the problem.
The underside was then cleaned thoroughly to remove old deposits, providing a fresh baseline for tracing new oil. We checked the PTU oil level, topped it to specification, and carried out a controlled road test to replicate the fault.
When the Discovery Sport returned from the test drive, new traces of oil were visible underneath, confirmation that the leak was active and not a leftover from earlier residue. That evidence gave our technicians the direction needed for a deeper investigation.
As independent Land Rover experts, the team at CSN Autos, Wymondham, works with the same technical data, systems, and equipment used by main dealerships, providing dealer-level precision with the attentive service of a local specialist.
Tracing the Source: How our Experts Found the Land Rover Oil Leak
The new oil markings focused around the transfer box, also known as the Power Transfer Unit (PTU) – a critical part that transfers power to the rear axle when four-wheel drive is active.
By using the Land Rover’s official technical data our experts confirmed that PTU oil leaks are a common issue on some Discovery Sport models, usually due to wear in the input seal and sleeve where it connects to the gearbox.
Using that information, our technicians removed the transfer box to carry out a detailed inspection.
Once separated, the fault was obvious.
- The input seal was damaged.
- The mating sleeve was worn and marked.
The combination had formed a small escape path for the vehicle’s oil to leak. As time passes, heat and movement can cause the seal to harden and erode the sleeve surface, causing the oil to seep out.
Because the PTU’s oil capacity is limited, even minor leaks can cause rapid oil loss, resulting in additional damage.
By reporting it early, Mr J prevented what could have been a much larger repair.
Repairing the Fault: Precision and Process from Start to Finish
Before we began the repair, our team phoned Mr J to review our findings and outline the most effective way to correct the Land Rover oil leak.
At CSN Autos, Wymondham, communication is key. We never proceed until you’ve approved the work, so you stay informed every step of the way.
Once Mr J gave us the green light, our experts transitioned from diagnosis to detailed repair.
Repairing a Land Rover PTU oil leak demands accuracy, proper tooling, and careful alignment to Land Rover standards.
The step-by-step process our experts followed included:
- Recording alignment: Before disassembling, we documented the PTU’s original position relative to the gearbox. This record ensures the same geometry is maintained on refit, ensuring the replacement seal fits perfectly.
- Detailed surface inspection: With the PTU removed, all sealing faces, housings, and contact surfaces were checked for wear or damage that could affect the new seal.
- Installing genuine Land Rover parts: We used a manufacturer-approved seal and sleeve kit to ensure perfect compatibility. Changing both components together eliminates the risk of uneven wear and future leaks.
- Setting tolerances precisely: Using Land Rover’s specialist installer tools, the seal depth and sleeve position were set to exact factory tolerances. These precise measurements ensure consistent oil retention under pressure.
- Renewing one-time fasteners: All single-use bolts and circlips were replaced and torqued in order to use manufacturer torque settings. Even pressure across every fixing helps prevent future misalignment.
- Refilling and testing: The unit was refilled with the correct Land Rover-specification gear oil and checked for correct levels and sealing integrity.
- Comprehensive quality inspection: The PTU assembly was cleaned, inspected, and verified before the final road test. Our quality control ensures the repair meets the same standard as a dealer-level fix.
Every stage of our process is critical. It’s the accuracy, patience, and attention to detail that determine how long a repair lasts and how reliably the vehicle performs.
Testing and Validation: Verifying the Land Rover Oil Leak Repair
Once the transfer unit had been rebuilt, our technicians carried out a complete quality-control sequence to verify the work.
As part of our quality control process, we performed an extended road test.
During which, the outcome was clear:
- No leaks.
- No diagnostic warnings.
- No residue.
The Land Rover delivered flawless performance; quiet, stable, and most importantly… leak-free.
That reliability is earned through consistency: each inspection verified before moving to the next, ensuring nothing is missed. Cutting corners might appear efficient, but it risks repeat faults later down the line.
After final checks, our team proceeded with the Land Rover’s scheduled servicing.
The vehicle met every quality benchmark and was ready to be returned to Mr J. For him, the result was obvious: an accurate, long-lasting repair and an expert Land Rover service completed sooner than the main dealership could.
Delivering More Than a Repair: Genuine Quality, Proven Results
When Mr J returned to collect his Discovery Sport, we explained each stage of the process and showed him the damaged seal and sleeve that had caused the leak.
At CSN Autos, Wymondham, we believe transparency builds trust, not assumptions.
Seeing the evidence made the repair tangible. Mr J left confident his Land Rover’s leak had been resolved properly.
The provided better value and turnaround than a main dealer could offer, but the real difference lay in the precision behind the result. Every stage of the job had been carried out to exact standards and double-checked before return.
That’s the hallmark of CSN Autos, Wymondham: clarity, accuracy, and lasting confidence with every repair.
Land Rover Oil Leak? Book Expert Diagnosis at CSN Autos, Wymondham
If you’ve noticed oil marks under your vehicle, act quickly. A small oil leak might not seem urgent, but it can escalate fast and lead to expensive damage.
At CSN Autos, Wymondham, our Land Rover specialists use dealer-level diagnostic equipment to locate and fix oil leaks accurately the first time.
We deliver the same technical expertise as a dealership but with the friendly, efficient service of a local independent garage.
That’s how we combine precision, care, and better-than-dealer value in every repair or service.
Why drivers choose CSN Autos:
- Land Rover specialists with dealership-grade tools and software.
- Genuine parts fitted to manufacturer standards.
- Courtesy cars available on request.
- 12-month parts and labour guarantee.
- Award-winning service: South Norfolk Small Business of the Year 2024, Top Garage.
- Finalist 2023 & 2024.
Join the {{review-count}} customers who’ve rated us {{average-rating}} stars for quality, reliability, and professionalism across Wymondham and Norwich.
Whether you’ve got a car leaking oil or need a full Land Rover service, choose CSN Autos, Wymondham for all your vehicle’s needs.
Call our experts today on 01953 425983 to keep your Land Rover in peak working condition.
