On vehicles equipped with an automatic transmission it is imperative that the converter pilot hub be greased with Motorcraft Multi-Purpose Grease Spray XL-5-A even if grease was not applied from the factory. Also verify that the engine/transmission alignment dowel pins are present as well as the engine crankshaft dowel pin, if equipped, when installing the transmission. Failure to adequately lubricate the converter hub greatly increases the likelihood of the flexplate cracking in the future. Missing dowels may cause a misalignment issue also resulting in a premature failure. Refer to Workshop Manual (WSM), Section 307-01.
full bulletin at NHTSA ↗2012 Ford Fusion powertrain problems
moderate 131 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Failure mileage
Complaints
131
Recalls
0
Avg fix
$2,500
2crashes
When does it fail?
Of the 131 powertrain complaints filed for the 2012 Ford Fusion, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 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 131 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.
No new NHTSA powertrain complaint has been filed on this vehicle in over 5 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering powertrain 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.
6F35 TRANSMISSION - FLUID LEAK AT LEFT SIDE HALFSHAFT SEAL BUILT ON OR BEFORE 10/14/2013 ISSUE Some 2009-2014 Escape, 2009-2011 Mariner, 2010-2014 Fusion, 2010-2011 Milan, 2012-2014 Edge/Explorer, and 2013-2014 Taurus/MKT/MKZ vehicles built on or before 10/14/2013 and equipped with a 6F35 automatic transmission may exhibit a fluid leak from the left hand (LH) transmission halfshaft seal due to wear on the transmission case bushing.
full bulletin at NHTSA ↗6F35 Transmission - Fluid leak at left side halfshaft seal - built on or before 10/14/2013
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2012 Fusion powertrain troubles break down into several distinct categories, all with real safety implications.
Transmission shifting is the dominant complaint. In lower gears (1st through 4th), the gearbox slams hard, lurches violently, and shudders—especially during initial acceleration and in cold weather or stop-and-go traffic. Some owners describe a 2–3 second delay before the transmission engages a gear. Higher gears usually shift smoother. Owners report this from the first few thousand miles onward. Flaring (RPM spike before dumping into gear) and slipping during 2nd-to-3rd shifts round out the picture. Ford dealerships told owners this behavior is "normal" or "typical for this 6F35 transmission," yet owners note comparable transmissions in other brands shift far more smoothly.
Sudden loss of power and throttle unresponsiveness is the second major failure mode. At any speed—from 5 to 70 MPH—the engine cuts out or goes into "limp mode," the wrench light illuminates, and the car won't accelerate beyond 3–15 MPH. Restarting temporarily fixes it. Owners report no warning codes present in many cases. Diagnostics point to a faulty electronic throttle body. Ford issued a service campaign (13N03), but parameters excluded many qualifying vehicles, and dealers refused throttle replacement without a diagnostic code present.
Stalling while stopped or moving, rough hesitation during acceleration, erratic downshifting at highway cruise speeds, and occasional electrical system failures immobilizing transmission in park round out the failures owners cite. None of these trigger consistent diagnostic codes. Dealers apply software updates, perform PCM reflashes, and sometimes make things worse. Owners consistently report being told the issue cannot be replicated in the shop—a diagnostic dead end.
Same Ford Fusion powertrain reports on nearby years: 2010 · 2011 · 2013 · 2014 · 2015
Failure modes owners describe
Harsh/Rough Transmission Shifts (1-4 Gears)
Transmission shifts extremely hard and unexpectedly, particularly in lower gears (1st to 2nd, 2nd to 3rd, 3rd to 4th). Owners report jolting, lurching, shuddering, and clanking noises. Severity varies with temperature, throttle application, and traffic conditions. Shifts in higher gears (4th-6th) generally smoother. Issue occurs whether accelerating slowly or rapidly.
When: Typically within first few thousand miles; worsens over time. More severe in cold weather and during stop-and-go traffic or after extended idle.
Symptoms owners cite: Hard, rough shifting into gears; Jolting/lurching sensation during gear changes; Clanking or metallic noises during shifts; Shuddering when accelerating from crawl; Delays of 2-3 seconds before transmission engages gear; Violent or unexpected gear engagement from park to drive/reverse
Repairs/costs cited: Dealers applied TSB 12-3-7 and TCM reflash (TSB 12-6-12) in some cases; created additional slippage in higher gears. Transmission fluid changes performed by independent shops showed normal fluid color and no debris at 100K miles despite Ford not recommending fluid change until 150K.
Recalls/TSBs owners mention: Ford dealerships initially stated hard shifting is 'normal' or 'typical for this 6F35 transmission' and 'a known issue.' Some dealerships stated 'Ford is aware of the problem but doesn't know how to fix it.' Reflash updates and PCM reprogramming attempted but did not resolve issues; some made symptoms worse.
Transmission Slipping/Loss of Power During Shifts
Transmission loses traction or power momentarily during gear changes, particularly in 2nd to 3rd gear shifts at low speeds. Vehicle momentarily loses almost all power, requiring acceleration planning. Flaring (RPM spike before dump into gear) also reported at higher gears. Issue worsens in warm weather.
When: Can occur within first 8,000-9,000 miles; more frequent in stop-and-go traffic and after vehicle sits in warm weather 24-48 hours.
Symptoms owners cite: Loss of power during 2-3 shift, especially below 10 MPH; Transmission flare (RPM increase before downshift/upshift); Hesitation or delay in acceleration following shifts; Difficulty climbing hills during low-speed shifts; Vehicle loses forward momentum during shifts
Repairs/costs cited: TSB 12-3-7 applied in one case but resulted in additional slippage. No other repairs documented as successful.
Recalls/TSBs owners mention: No recalls issued. Dealers stated behavior is normal. Ford has not provided effective solutions.
Sudden Loss of Power / Throttle Body Malfunction
Engine suddenly loses power without warning at any speed (5-70 MPH range documented). Vehicle enters limp/safe mode with wrench warning light. Engine unresponsive to accelerator pedal; vehicle can only reach 3-15 MPH. Issue occurs intermittently and without codes present in many cases. Restarting vehicle temporarily restores function. Related to faulty electronic throttle body.
When: Reported at various mileages from 5,000 miles to 100K+ miles. Incidents can occur within minutes of restarting or after weeks of normal operation. A/C activation may trigger the issue.
Symptoms owners cite: Complete loss of acceleration/response to throttle; Wrench light and/or engine light illumination; Rough idle (1K RPM); Boggy, sputtering engine behavior; Vehicle limited to 3-15 MPH; Temporary reset after off/on cycle
Codes mentioned: P2111, P0715 (Input/Turbine Speed Sensor Circuit Malfunction), P0717 (Input/Turbine Speed Sensor No Signal)
Repairs/costs cited: Throttle body replacement performed by dealers in multiple cases. One owner self-diagnosed and replaced electronic throttle body after dealer could not find codes. Dealers reported throttle bodies are plastic and mass-produced, suggesting quality issues.
Recalls/TSBs owners mention: Ford issued Customer Satisfaction Program 13N03 for throttle body replacement, but parameters were narrow and excluded many qualifying vehicles. Program expired despite issues persisting. Many dealers refused to perform replacements without diagnostic codes present. Owners cite Ford service bulletins for this exact problem but dealers are reluctant to act.
Hesitation/Bogging During Acceleration
Engine hesitates or bogs down when accelerator is pressed, particularly from complete stop or during light throttle applications. Vehicle jerks or lurches forward after hesitation. Inconsistent acceleration response (same pedal input produces different results). Issue occurs during merging, intersection crossing, and normal acceleration.
When: Ongoing; reported after cold start and warm operation. More noticeable during initial acceleration from stop or light throttle.
Symptoms owners cite: Hesitation before vehicle moves forward; Bogging sensation when pressing gas pedal; Lurch forward after hesitation; Inconsistent acceleration response; Loss of power momentarily; Acceleration delay when merging onto highway
Repairs/costs cited: Cleaning of throttle body and related components performed by one shop; problem recurred within 2 weeks. PCM updates attempted by dealers.
Recalls/TSBs owners mention: Dealers unable to replicate in shop. No effective solution provided.
Erratic Downshifting at Highway Speeds
Vehicle unexpectedly downshifts to lower gear while in cruise control at highway speeds (55-65 MPH), causing RPMs to spike excessively. Tapping brake or gas does not allow proper upshift; vehicle coasts before eventually shifting to appropriate gear. Results in hard, violent gear engagement with potential safety hazard.
When: Occurs during cruise control operation at highway speeds.
Symptoms owners cite: Unexpected downshift while cruising; RPM spike (engine revving excessively); Inability to manually control gear selection while downshifted; Hard dump into gear after coasting; Safety concern due to loss of control
Repairs/costs cited: No repairs documented as successful.
Recalls/TSBs owners mention: Dealership stated 'Ford is aware of the problem but doesn't know how to fix it.'
Stalling / Engine Shutdown While Stopped or Driving
Engine stalls without warning while stopped at lights/stop signs or while driving. No warning lights present in some cases. Vehicle must be restarted multiple times in some instances. Issues linked to computer programming defects.
When: Reported from early ownership; in one case at 6 months post-purchase.
Symptoms owners cite: Sudden engine shutdown while stopped; Engine shutdown while driving; No warning light prior to stalling (in some cases); Wrench light may appear; Difficulty restarting; Freeze frame data not retained
Codes mentioned: P2111 (in one case, pulled from freeze frame)
Repairs/costs cited: PCM computer update/programming performed by dealership.
Recalls/TSBs owners mention: Ford issued computer update to address; some owners unaware of recall/service campaign. Issue recurs in some vehicles despite update.
Electrical System Failures (Powertrain-Related)
Electrical system failures causing transmission to become immobilized in park. When electrical issue occurs while running: transmission stuck in park (cannot shift to neutral or drive), turn signals, headlights, door windows, A/C, and dashboard display malfunction. When issue occurs during startup: only able to start engine but transmission cannot shift from park. Dangerous night driving and highway situations. Dealerships unable to diagnose despite multiple visits.
When: Recurs frequently; may occur after days of normal operation or go weeks between incidents.
Symptoms owners cite: Transmission stuck in park; unable to shift; Turn signals inoperative; Headlights inoperative; Door window controls inoperative; A/C inoperative; Dashboard display/clock/radio inoperative; Requires towing as only solution
Repairs/costs cited: No repairs documented; service center unable to identify cause.
Recalls/TSBs owners mention: No solution provided. Service centers state they cannot find issues when vehicle is brought in, as problem does not manifest during diagnosis.
Excessive Engine Acceleration While Stopped (Unintended Acceleration)
Engine accelerates to 5,500-6,000 RPM while stopped or nearly stopped, despite foot on brake. Occurs in drive mode. In one case, brakes did not hold vehicle against engine acceleration. Must shift to neutral or shut off ignition to stop acceleration.
When: Reported on January 2, 2012 in two separate occasions within short timeframe.
Symptoms owners cite: Rapid engine acceleration to high RPM while in drive at stop; Acceleration occurs despite foot on brake; Brakes fail to hold vehicle (in one case); Must shift to neutral or kill ignition to stop
Repairs/costs cited: None documented.
Recalls/TSBs owners mention: None documented. Owner notes manufacturers have no system to diagnose random events and are in denial due to litigation concerns.
Transmission Shift Delay / Inability to Shift Gears
Transmission takes excessive time (sometimes over 2 seconds) to shift from reverse to forward or vice versa. Vehicle unable to move or delayed movement. Maintenance light appears. RPMs rev but car stuck at low speed or immobile. Loud noise and violent jerking when shifting into neutral from stuck state.
When: Occurs particularly when vehicle sits idle in traffic or at drive-through.
Symptoms owners cite: Excessive delay (2+ seconds) between shift selection and engagement; Maintenance light illumination; RPM rev with no movement; Loud noise during shift; Violent jerking during shift transitions; Vehicle stuck at low speed (few MPH) or immobile
Repairs/costs cited: Multiple sensor replacements attempted at shops without success. One valve replacement (sticking valve) resolved issue temporarily.
Recalls/TSBs owners mention: None documented.
Vehicle Cannot Be Removed from Park (Shifter Lock)
Transmission cannot be shifted out of park after vehicle is parked. Shifter locked in park. Vehicle becomes immobilized. Dangerous when occurring during stopped traffic. One owner able to remove key while in drive mode (shift interlock failure).
When: Reported in one case at multiple attempts.
Symptoms owners cite: Shifter cannot move from park to neutral or drive; Requires towing; Key can be removed while in drive mode (in one case)
Repairs/costs cited: Dealership quoted $400+ for repair but issue not resolved. Owner self-resolved by continued attempts.
Recalls/TSBs owners mention: Ford legal department failed to address situation. Dealership attempted to charge customer for 'serious vehicle malfunction.'
Intermittent Brake/Powertrain Interaction Issue
Vehicle exhibits brake sticking sensation or unwanted brake engagement during operation. When accelerating, vehicle won't move without hard acceleration. When letting off gas, car stops abruptly without brake application. Brakes become stiff/hard to press. Front tires overheat (heat rolling off, smell). No codes present. Dealers unable to duplicate when vehicle is in shop. PCM update and powertrain replacement performed but may not resolve.
When: Intermittent; occurs at least once per week in one case.
Symptoms owners cite: Brake sticking sensation (feels like brakes engaged); Vehicle won't move without acceleration; Abrupt stop when releasing gas without brake input; Stiff/hard brake pedal; Front tire overheating (heat, smell); Inability to shift or stuck at 3 RPM at times; Issue comes and goes
Codes mentioned: Powertrain codes (general)
Repairs/costs cited: PCM update performed. Powertrain replaced. One dealer observed visible heat damage on front brakes.
Recalls/TSBs owners mention: No solution confirmed effective.
Canister Purge Valve Failure
Check engine light illuminates due to faulty canister purge valve. Issue recurs after repair. Customer Satisfaction Program 16B38 offered but vehicle VIN not applicable.
When: Failure mileage approximately 94,015 miles.
Symptoms owners cite: Check engine light illumination
Repairs/costs cited: Canister purge valve replaced by independent mechanic; failure recurred.
Recalls/TSBs owners mention: Ford issued Customer Satisfaction Program 16B38 (PCM reprogramming and canister purge valve inspection) but vehicle VIN excluded from program parameters. Manufacturer referred customer to NHTSA.
Synthesized from 131 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Tl* the contact owns a 2012 Ford fusion. The contact stated while driving 35 MPH, when depressing on the brake pedal and the vehicle began to forcefully vibrate when approaching 30 MPH. The contact stated no warning light was illuminated. The contact drove slowly to her residence. The vehicle was taken to an independent mechanic and the contact was informed that the driveshaft needed to be…
Had powertrain trouble with your 2012 Ford Fusion?
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 2012 Ford Fusion?
It's a documented issue but not catastrophic. 131 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 100 complaints that reported odometer mileage, most powertrain failures cluster between 25,500 and 89,000 miles, with the median around 55,150. A quarter of owners report trouble before 25,500; a quarter make it past 89,000. 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/2012/Ford/Fusion.
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.