Engine started to miss and lost power had to pull off road immediately. Coil shorted out so badly mechanic said it could have caught fire! Date of trouble 12-26-15. After spending $1600 to replace all 6 coils per the tsb requirements and spark plugs etc still not working because of bad PCM unit that has to be fixed and reprogrammed! Another $1100! Please consider this a safety hazard! I was a…
2008 Lincoln MKX powertrain problems
moderate 30 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Failure mileage
Complaints
30
Recalls
0
Avg fix
$2,500
When does it fail?
Of the 30 powertrain complaints filed for the 2008 Lincoln MKX, here's the actual mileage breakdown — failures cluster heaviest at 125,000-150,000 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.
What stands out
Owners have filed 30 powertrain complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
Among the 11 model years of Lincoln MKX in our records for powertrain problems, this one ranks #2 by owner-complaint volume.
The failure pattern owners describe
Buyer takeaway: A 2008 Lincoln MKX powertrain comes with serious risks: transmission loss of power, PTU fluid leaks that owners can't detect, and shift failures happen on many examples with no reliable fix. Warranty coverage for the known transmission issue expired long ago, leaving owners with bills of $1,600–$6,300.
The 2008 MKX powertrain throws multiple gremlins at owners, and they recur across the 30-complaint sample with striking consistency.
Transmission power loss is the most dangerous. The transmission quits without warning while driving, forcing the vehicle into near-immobile limp mode. The engine keeps running but the car crawls at 2–5 mph, warning lights flash, and the odometer goes blank. Restarting or waiting 5–20 minutes sometimes restores function, but the problem returns unpredictably—some owners report 2–3 incidents a year over several years. One owner was told Lincoln extended transmission warranty to 8 years due to a safety alert, then denied his claim because he reported the issue one month after expiration.
PTU (power transfer unit) transmission fluid leaks plague many examples. The leak is invisible—no puddle forms—yet fluid mysteriously runs low. Heat from the engine's proximity to the PTU degrades seals. Owners detect the leak only when the car starts smoking, looking like it's on fire. Once seals fail, transmission damage accelerates. Repairs cost $1,600–$2,500, with some leaks recurring on the same vehicle after repair.
Shift problems include harsh banging when engaging drive or reverse, getting stuck in high gear with no power, and hard downshifts that jolt the vehicle. Transmission speed and output sensors fail at 75,000+ miles, triggering limp mode and forcing expensive diagnostics that often find nothing conclusive.
Other issues: transfer case failure that destroys the transmission; ignition coil shorts requiring $1,600+ in repairs; throttle body failure at low mileage; and lack of hill-assist causing rollback on inclines.
Same Lincoln MKX powertrain reports on nearby years: 2007 · 2011
Failure modes owners describe
Transmission loss of power / limp mode
Vehicle loses transmission power without warning while driving, leaving driver stranded. Engine continues running but transmission won't shift or move the vehicle. Occurs intermittently, sometimes repeatedly over several years.
When: Intermittent, 2-3 times per year on some vehicles; can happen at any speed or stop condition
Symptoms owners cite: Vehicle crawls or won't accelerate beyond 2-5 mph despite pedal engagement; Transmission fails to shift properly; Odometer and speedometer display zeros or dashes; Wrench and airbag warning lights illuminate; Vehicle requires engine restart or waiting 5-20 minutes to regain power
Codes mentioned: TSS (transmission speed sensor) failure, OSS (output speed sensor) failure, Transmission sensor failure
Repairs/costs cited: Owners report overfilling transmission fluid temporarily masks issue; no permanent fix found without dealer service. Transmission fluid overfill done by some owners; transmission rebuilds or replacements cited at $1600–$6296.
Recalls/TSBs owners mention: Lincoln issued a voluntary safety alert extending transmission warranty from 6 to 8 years; owner reporting one month after expiration was denied coverage.
PTU (Power Transfer Unit) transmission fluid leak
Power Transfer Unit leaks transmission fluid without visible pooling underneath vehicle. Leak caused by proximity of PTU to engine heat, which deteriorates seals and gaskets over time. Owners cannot detect low fluid visually. Problem occurred since manufacture on many units.
When: Develops over time after 40,000–200,000 miles; some reported as inherent design issue from new
Symptoms owners cite: Transmission fluid mysteriously low with no visible leak; Smoking from under car that looks like vehicle is on fire; Subsequent transmission damage and shifting problems after seal failure; Owner must repeatedly add transmission fluid or overfill to maintain drivability
Repairs/costs cited: PTU replacement costs $1600–$2500. Leak repairs include seal and PTU replacement, sometimes repeated on same vehicle. Some owners report fluid leaks recurred post-repair. Heat shield requested by owners but not provided.
Recalls/TSBs owners mention: Repairs covered under 6-year/extended 8-year warranty; after expiration, customer pays full cost. AMCCO in Zanesville, Ohio noted multiple repairs under warranty.
Harsh transmission shift banging / shift shock
Transmission produces loud 'bang' or clunk when shifting, often accompanied by jolting sensation. Happens when putting car in drive, reverse, or during downshift. Hard shifts can occur from dead stop, low speeds, or while driving.
When: Recurring over weeks or months; happens 2–20+ times on some vehicles
Symptoms owners cite: Loud 'bang' or 'clunk' when engaging drive or reverse; Vehicle jolts or lurches when shifting; Hard shift when downshifting; Transmission bangs so hard driver fears it will drop from vehicle
Codes mentioned: Transmission control module error
Repairs/costs cited: No specific repair noted in narratives; some resolved by restarting vehicle or cycling transmission, others require dealer diagnostics that find nothing wrong.
Stuck in high gear / upshift to high gear without driver input
Vehicle unexpectedly shifts into high gear on its own and remains stuck, or fails to downshift out of high gear. No driver action triggers the shift. Vehicle has no power and cannot accelerate normally until it exits the condition.
When: Intermittent; lasts 4–20 minutes per episode; some vehicles experience ~20 occurrences
Symptoms owners cite: Transmission shifts into high gear without warning or driver input; Vehicle stuck in high gear with no power below 55 mph; Poor throttle response when attempting to accelerate; Wrench, airbag, and engine warning lights come on; Odometer and speedometer may go blank; Loud 'bang' when transmission finally engages
Repairs/costs cited: No repair cost cited; some owners report restarting vehicle helps restore function temporarily.
Transmission shift sensor failures
Transmission speed sensor (TSS) and output speed sensor (OSS) fail, causing transmission to enter limp mode. Vehicle shifts hard, cannot maintain proper gear, and warning lights activate.
When: 75,000+ miles reported
Symptoms owners cite: Car goes into limp mode and barely moves; Hard shift engagement; Speed and odometer fail; All warning lights come on; Problem resets after engine restart but recurs unpredictably
Codes mentioned: TSS (Transmission Speed Sensor) failure, OSS (Output Speed Sensor) failure
Repairs/costs cited: One owner cited sensor replacement; diagnostic testing by transmission shop could not pinpoint cause in some cases.
No hill-hold / rollback on inclines
Vehicle rolls backward on steep inclines when driver removes foot from brake. Automatic transmission lacks hill-assist feature standard on modern automatics. Creates dangerous situation when vehicle cannot hold on incline.
When: Occurs at stop on steep inclines
Symptoms owners cite: Vehicle rolls backward when brake is released on incline; No hill-assist function available; Driver must brake and accelerate simultaneously to prevent rollback
Repairs/costs cited: Dealer advised owner to use automatic like manual transmission (brake and accelerate together). No repair offered; dealer said no hill-assist was ever installed.
Recalls/TSBs owners mention: Lincoln dealer stated this is normal characteristic and no hill-assist was installed on this model.
Transfer case failure / AWD malfunction
Transfer case fails, causing loss of power and transmission damage. Sudden failure without prior warning; one case led to complete transmission failure requiring replacement.
When: 55,000–92,800 miles
Symptoms owners cite: Hard time shifting between gears; Long acceleration lag after pushing pedal; Vehicle will not move in Drive or Reverse after restart; Cannot get into Neutral
Repairs/costs cited: Transfer case failure can ruin transmission. Repair cost cited as $6,296.22 for transfer case and transmission replacement. Shop reported seeing 3 other Lincolns with same problem.
Ignition coil failure / engine miss and power loss
Ignition coil shorts out and fails, causing engine misfire and loss of power. Multiple coil failures in same vehicle. Mechanic noted coil failure could have resulted in fire.
When: Varies; one case at 12/26/15
Symptoms owners cite: Engine starts to miss; Loss of power on road; Engine light may illuminate
Repairs/costs cited: Replacement of all 6 coils per TSB requirements, plus spark plugs: $1,600. Additional PCM (powertrain control module) failure required $1,100 repair. Even after coil replacement, vehicle still not working due to bad PCM.
Recalls/TSBs owners mention: TSB (Technical Service Bulletin) exists for ignition coil replacement.
Throttle body repeated failure
Throttle body fails prematurely and requires replacement multiple times on same vehicle.
When: First failure at 21,158 miles; second failure at 62,978 miles
Symptoms owners cite: Excessive throttle body failure rate on this model
Repairs/costs cited: Throttle body replacement required at least twice on this vehicle.
Sputtering and stalling under acceleration
Vehicle sputters, shakes, and stalls during acceleration attempts, especially on inclines or during merges. Engine remains running but car loses power and can barely creep.
When: Intermittent; can happen on expressway ramps, city streets, highway cruising
Symptoms owners cite: Sputtering and shaking under acceleration; Vehicle loses power and stalls; Jerky, choppy acceleration from dead stop; Vehicle crawls along at 5–8 mph until condition resolves; Slow to accelerate at cruising speeds
Repairs/costs cited: Restarting vehicle can restore normal function. Owner mentioned one month prior turbo speed sensor replacement did not resolve issue.
Transmission slipping
Transmission slips and loses grip; vehicle inches forward despite high acceleration attempts. Vehicle makes several noises then stops moving entirely.
When: After months of occurrence
Symptoms owners cite: Transmission slipping for extended period; Vehicle inches along with high acceleration attempts; Multiple noises from transmission; Vehicle eventually stops moving
Repairs/costs cited: Initially misdiagnosed as misfire.
Synthesized from 30 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 3 most recent
Tl* the contact owns a 2008 Lincoln mkx. The contact stated that while driving at approximately 5 MPH, the accelerator pedal was engaged repeatedly but the vehicle failed to accelerate over 5 MPH. The vehicle stalled and the vehicle was able to restart. The failure recurred on several occasions. The vehicle was taken to the dealer where it was diagnosed that a sensor on the transmission failed.…
Driving down the highway and transmission shift to low by itself. It almost caused me to get it. The ptu is leaking transmission fluid. Youneverknow when it is low. This car had this problem since it was manufactured and they never fixed the problem. It needs to be fixed and needs a heat shield between the ptu and the engine to keep it from leaking and causing dangerous situations on the road.…
Had powertrain trouble with your 2008 Lincoln MKX?
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 powertrain problem on the 2008 Lincoln MKX?
It's a documented issue but not catastrophic. 30 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Across the 24 complaints that reported odometer mileage, most powertrain failures cluster between 71,000 and 145,000 miles, with the median around 93,000. A quarter of owners report trouble before 71,000; a quarter make it past 145,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain 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 powertrain?
No active recalls currently cover powertrain 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/2008/Lincoln/MKX.
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.