Diagnostic Fault Finding
Maker-level scan tools connect to every control module, not just the main ECU. They pull live data, stored codes, and freeze-frame readings to find the exact root cause of the fault.
Every module

Zenfo Auto Services is a MOIAT-certified, multi-brand automotive workshop in Mussafah trusted by hundreds of Range Rover owners across Abu Dhabi for precise engine work, full overhauls, and lasting results. Every job is handled by certified technicians using maker-level tools and OEM-grade parts.

Tap a number on the engine or a fault in the list to see where it starts and what it feels like from the driver’s seat.
Worn chains in TDV6 and SDV6 diesels create a metallic rattle at idle, cause misfires, and risk serious valve damage if the chain snaps under load.
High pressure inside the cylinder breaks the seal between the block and head. This lets coolant mix with oil, shown by white exhaust smoke and a milky film on the dipstick.
Plastic tanks, aging hoses, and weak water pumps break down faster when the heat stays above 45 °C for months. This cuts heat removal by up to 30% and puts extra strain on the climate system. Vehicles with cooling faults often need AC repair at the same time.
Carbon buildup in oil feed lines and worn bearings cut off oil to the turbo, causing blue or grey smoke from the tailpipe and a clear drop in boost. This is often paired with blocked flow that requires exhaust repair alongside the turbo work.
Common in the TDV6 family, pump failures stop oil flow to moving parts within seconds. This triggers bearing wear, hot spots, and even crankshaft fracture.
Blocked or leaking injectors throw off the air-fuel mix, causing rough idle, slow pickup, and up to 15% more fuel use across both petrol and diesel Range Rover variants.
Maker-level scan tools connect to every control module, not just the main ECU. They pull live data, stored codes, and freeze-frame readings to find the exact root cause of the fault.
Every moduleEach cylinder is tested one by one to check its health. This shows whether the issue sits in the piston rings, valves, or head gasket before any part is taken out.
Cylinder by cylinderStretched or failed chains are removed along with the tensioners. A new chain set is then fitted and re-timed to factory marks using dial-gauge checks for correct valve timing.
Dial-gauge timedDamaged gaskets are replaced after the cylinder head is checked for warping and skimmed flat. New stretch bolts and fresh coolant finish the job.
Skimmed flatWorn bearings, bad seals, and blocked oil feed lines are fixed, or the full turbo unit is swapped. Boost-pressure testing under load follows every turbo job to confirm output.
Boost-testedRadiator flush, new thermostat, water pump swap, and hose changes bring the running temperature back to the 90-105 °C range needed for safe driving in Abu Dhabi summer traffic.
90–105 °CUltrasonic cleaning restores the spray pattern and fuel mist. Each injector is then tested on a bench to confirm it puts out within 2% of its rated volume before going back in.
±2% flowValve cover gaskets, oil pan seals, timing cover gaskets, and rear main seals are replaced with OEM-spec parts. This stops oil from spreading to belts, sensors, and wiring.
OEM-spec sealsMain and big-end bearing journals are measured, polished or reground, and fitted with new shells. This brings back the oil gaps that keep the crank safe from heat damage and cracking.
New shellsThe block is stripped on a bench. Pistons, rings, bearings, and gaskets are replaced, and the bores are honed to bring back compression within 5% of the factory spec.
Within 5% compressionA rebuilt or new engine matched to the vehicle’s code is fitted with full part transfer, fresh fluids, and a road test. This is the right choice when the block is cracked past repair limits.
Code-matchedOnce the hands-on work is done, the ECU is reset, live values are cleared, and a final exhaust test confirms the vehicle meets UAE rules before workshop handover.
UAE emissions

10 years of hands-on work on luxury vehicles, with every technician trained on petrol, diesel, and mild-hybrid types using maker-level methods.
Genuine JLR parts and approved options sourced from licensed suppliers, with full part-number tracking noted on every invoice.
Written quotes are approved before any work starts. No hidden labour charges, no surprise part add-ons, and no work done without your say-so.
Fully registered under the UAE Ministry of Industry and Advanced Technology, with climate-controlled workshop bays that guard both the vehicle and technician accuracy all year.
Photo reports, stamped service books, and digital records come with every job. These support resale value and a clear service history for future owners.
Every confirmed booking includes free pickup and delivery across Abu Dhabi, so Range Rover owners never lose a day to workshop runs.
An advisor at our Mussafah garage reviews your symptoms, runs a quick scan, and gives a written quote covering parts, labour, and timeline before any work starts.
A full-system scan, live-data review, and pressure testing pin down the exact fault. This step tells apart real mechanical wear from sensor or software issues.
Faulty parts are removed, checked, and pictured. Nothing is replaced or machined until you sign off on the full cost breakdown.
New gaskets, seals, and fluids go in. Every bolt is torqued to spec, and the built-up unit is run at idle and under load inside the workshop.
You get a digital report with before-and-after photos, and a parts list, along with a short road test to confirm that all is well.
A rebuild keeps the original block by replacing worn parts like pistons, rings, bearings, gaskets, and timing parts. Bore and journal sizes are brought back through precise honing. This costs 30-50% less than a full swap and adds 100,000-150,000 km of usable engine life to sound blocks. Both petrol and diesel engine types gain the same benefit from this method.
A full swap is needed when the block is cracked, the bores are scored past machining limits, or the crank has broken. A broken crank often harms the torque converter and gearbox parts too so that transmission repair may be needed at the same time. A rebuilt or new unit usually takes 3-5 working days for supply, fitting, and testing.
Our workshop techs have hands-on time with every Range Rover powertrain option:
Each one has its own torque specs, oil grade needs, and scan settings. Our tools carry the full JLR (Jaguar Land Rover) software to access every module in every model year.
Shorter intervals offset faster oil breakdown above 45 °C and fine desert dust.
Book a proper oil change every 8,000 km instead of the usual 12,000 km, using fully synthetic oil that meets the JLR STJLR.03.5005 spec.
Swap the coolant once a year and fit a new thermostat every 80,000 km to stop flow blockage and overheating during Abu Dhabi’s peak summer months.
Look at all rubber parts at every service visit. Hoses and seals harden and crack twice as fast in lasting heat above 45 °C.
Change the filter every 15,000 km rather than 30,000 km to shield the turbo and injectors from fine sand and dust.
Run a full-system scan every 20,000 km to catch stored fault codes before they grow into bigger problems or cause follow-on damage.
Use only OAT (Organic Acid Technology) coolant approved by Land Rover. Mixing types weakens the rust protection and speeds up deposit buildup in the cooling lines.
Call our Mussafah workshop or email the make, model, and fault details. An advisor confirms the likely problem area and gives a written quote before any work starts. Same-week slots are open for urgent cases.
Still unsure about a symptom? Our advisors answer the phone and WhatsApp during workshop hours.
Ask an advisor WhatsAppA full overhaul takes 5-7 working days, based on parts supply and machining needs. Smaller jobs like timing chain, thermostat, or injector replacement are done in 1-3 days.
Yes. Genuine parts and approved OEM-grade options are both kept in stock at our garage. The price gap is explained before you choose.
A steady amber light means a stored fault. Book a scan within 48 hours. A flashing light means an active misfire or catalyst harm, so pull over right away and call for a tow.
Heat above 45 °C speeds up oil breakdown, drains anti-wear agents, and thins the oil layer that guards bearing surfaces. Shorter change cycles and fully synthetic oils rated for high-HTHS thickness cut this risk.
Free vehicle collection and return across Abu Dhabi is available with a confirmed booking.
A full pre-purchase inspection covers compression health, leak status, fluid condition, and complete fault history. This gives buyers a clear view of the powertrain state before committing.