Beginning in 2006 I started to experience a hesitation and a hissing sound in my 2005 Acura mdx at hwy and local rd speed for the past three years I have taken the vehicle to the dealership only to get the same response of unable to duplicate. I recently took the vehicle to the dealership again on 11/09 and this time they were able to duplicate the problem which was a bad torque converter which…
2005 Acura MDX powertrain problems
severe 82 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Failure mileage
Complaints
82
Recalls
0
Avg fix
$2,500
2crashes
3injuries
When does it fail?
Of the 82 powertrain complaints filed for the 2005 Acura MDX, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 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
Powertrain accounts for 46% of every owner complaint on file for this vehicle — the dominant problem area across 9 categories tracked.
Owners have filed 82 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.
The failure pattern owners describe
Buyer takeaway: A used 2005 Acura MDX buyer should expect serious transmission and torque converter issues starting around 55,000–89,000 miles, including shuddering, grinding noises, slipping, and potential unintended motion; repairs often cost $2,700+, may recur within weeks to months, and Acura's software updates have proven ineffective according to owner reports. Multiple owners report dealers denying warranty coverage, refusing diagnosis, or offering insufficient manufacturer support despite widespread acknowledgment of the defect.
Owners of 2005 Acura MDX vehicles report pervasive transmission and torque converter failures beginning as early as 30,000 miles and clustering heavily between 55,000 and 89,000 miles. The most common complaint is a shuddering, grinding, or rumbling noise between 25 and 45 mph during light acceleration or when holding steady speed on slight inclines. Owners consistently state this noise is a failing torque converter.
Dealers initially dismissed the noise as normal, then later acknowledged it required torque converter replacement—typically quoted at $2,700 to $3,111. However, owners report the replacement unit either failed again within weeks to a year, or was re-manufactured rather than genuinely new. Acura issued transmission software updates (2009, 2010, and others) claimed to address lock-up clutch function, but owners state these made no difference. One owner received a recall notice and had a PCM software update performed; the problem persisted identically.
Beyond noise, owners report slipping gears, hesitation, jerking during acceleration or downshifting, loss of power at highway speeds, and in one documented case, unintended lurching that caused a two-pole collision with airbag deployment. Some vehicles jumped into neutral unexpectedly while driving. Gear shift cables seized due to salt corrosion, requiring excessive force to shift. Acura offered limited financial help, and dealers routinely denied warranty coverage after mileage or time limits expired.
Owners consistently cite this as a systemic manufacturing defect, not wear and tear, and express frustration that Acura refuses a full recall despite documented widespread failure and acknowledged design flaws in later model years.
Same Acura MDX powertrain reports on nearby years: 2006
Failure modes owners describe
Torque Converter Shudder, Vibration, and Grinding Noise
The torque converter fails, causing pronounced shuddering, vibration, grinding, or rumbling noises typically between 25–45 mph during light acceleration or while holding steady speed, especially on slight inclines. Owners report the noise starting as early as 30,000 miles and recurring frequently. The failure often results in slipping gears, hesitation, and loss of power.
When: Typically 30,000–100,000 miles; most commonly reported at 55,000–89,000 miles
Symptoms owners cite: High-pitched ringing or groaning noise on acceleration; Shuddering, vibration, or juddering between 25–45 mph; Grinding, rumbling, or scraping sound under acceleration; Loss of acceleration or hesitation when pressing gas; Noise recurring or worsening after torque converter replacement; Slipping gears or transmission skipping
Codes mentioned: P0740 (TCC function), D4 light blinking, D5 light blinking
Repairs/costs cited: Torque converter replacement quoted at $2,700–$3,111. Many owners report the replacement either failed again within weeks to a year or was already re-manufactured rather than new. Some repairs covered under warranty or extended warranty; others required owner payment.
Recalls/TSBs owners mention: PCM/transmission software updates (December 2009, November 2010, and others) issued as 'Product Updates' to address lock-up clutch function; owners report these did not resolve the issue. Some recalls issued for specific model years (2003–2004 noted; 2005 reportedly lacked similar recall). Dealers initially dismissed noise as normal, then attributed it to 'electronic issues' before acknowledging transmission fault.
Gear Shift Cable Corrosion and Stiffness
The gear shift cable becomes difficult to move, stiff, or seized due to corrosion and salt exposure. Owners report requiring excessive force to shift gears, and the problem recurring after lubrication or initial cable replacement.
When: Reported between 65,000–89,000 miles; some complaints years after purchase
Symptoms owners cite: Gear shift lever difficult to move or stiff; Excessive force required to shift gears; Gear shift cable seized or stuck; Nearly caused accident due to inability to shift smoothly
Repairs/costs cited: Lubrication of cable offered as temporary fix ($0–150 initial attempt). Replacement of gear shift cable and lever arm cited at approximately $400–$450. Dealers noted rust corrosion on the cable. Acura acknowledged this as a design flaw in later model years.
Recalls/TSBs owners mention: Acura dealer offered $150 credit toward $450 repair; limited financial assistance provided. One owner reported a dealership representative threatened to withdraw a goodwill offer if the issue was reported to NHTSA.
Transmission Slipping, Jerking, and Loss of Power
Transmission intermittently loses power, slips gears, jerks during acceleration or downshifting, or fails to accelerate smoothly. Some owners report the car lurching forward unexpectedly or nearly stalling at low speeds.
When: Reported across mileage range; some as early as purchase, others at 70,000–140,000 miles
Symptoms owners cite: Transmission slipping or skipping gears; Jerking or lurching during acceleration; Hesitation or loss of power on acceleration; Car nearly stalling or revving without moving; Rough and noisy shifting at 35+ mph; Need to restart vehicle to restore power (temporary fix)
Codes mentioned: D4 light blinking, D5 light blinking
Repairs/costs cited: One owner paid $600 out-of-pocket for a used replacement transmission via AAMCO. Another reported $4,000 transmission replacement cost quoted by dealer. One owner cited transmission failure at 100,000 miles requiring $2,793.85 replacement.
Recalls/TSBs owners mention: Dealers cited warranty expiration to deny coverage. One owner with extended warranty had torque converter replaced; subsequent transmission work (switch replacement) charged despite recall work on same component. Dealers recommended 'driving until problem gets worse' rather than addressing under warranty.
Unintended Vehicle Motion (Reverse-to-Drive Surge and Shifting Errors)
Vehicle unexpectedly surges or shifts into an unintended gear, causing collision or loss of control. One documented case: vehicle jerked backward in reverse, struck a pole, then automatically shifted into drive and surged forward, striking another pole and deploying airbags.
When: At least one incident at 32,000 miles; another unspecified timing
Symptoms owners cite: Vehicle jerks or lurches without driver input; Unintended gear engagement (reverse to drive or neutral to drive); Loss of control or collision resulting from unintended motion; Airbag deployment; Vehicle jumping into neutral at any time while driving
Repairs/costs cited: One collision case: owner sustained cuts, bruises, burns; passenger was badly bruised and temporarily trapped in vehicle. Airbag deployment occurred (noted as improper in one case).
Recalls/TSBs owners mention: One owner reported Acura legal department promised contact but did not follow up. Transmission jump-into-neutral issue reportedly ongoing with no fix identified.
D4 and D5 Check Engine Light with Transmission Malfunction
Check engine lights (D4 or D5) illuminate, indicating transmission solenoid or pressure switch failure. Often occurs shortly after torque converter or transmission work.
When: Reported within weeks to months after transmission service or recall work
Symptoms owners cite: D4 light blinking on dashboard; D5 light blinking on dashboard; Transmission dysfunction concurrent with warning light; Recurring or intermittent warning light
Codes mentioned: D4 light blinking, D5 light blinking
Repairs/costs cited: One owner's friend had D4 light blink the day after torque converter replacement. Another owner had D5 light blink three weeks after transmission removal and reinstallation (recall work); dealer suggested possible switch failure and quoted full-cost repair if no extended warranty.
Recalls/TSBs owners mention: Dealers suggested defective pressure switch or noted that issue 'sometimes happens' after transmission removal. Warranty coverage denied if outside original coverage or if component was replaced during recall work.
Synthesized from 82 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 7 most recent
Transmission issues. *tr
Tl* the contact owns a 2005 Acura mdx. The contact stated that while driving she heard an abnormal grinding noise. The vehicle was taken to a local mechanic who performed a diagnostic that located the failure at the transmission torque converter. The contact stated she had previously received a letter from the manufacturer in regards to the failure. The dealer advised that the letter was sent to…
Found a strawberry milkshake in the radiator overflow tank. Diagnosis: failure of transmission cooler inside of radiator. *tr
Car is making a grinding noise at approximately 30 to 40 m/h. I had the timing belt changed and was told this noise is a transmission problem that is common to Acura mdxs between 02s to 06s. I have justified the cost of acuras because of their longevity and am very upset over the repair cost of $4000. Why hasn't Acura been forced to stand behind this defect when it seems to be so common…
Torque converter slipped - failure of transmission - Acura mdx 2005 *tr
Transmission problems on Acura mdx. *tr
Had powertrain trouble with your 2005 Acura MDX?
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 2005 Acura MDX?
It's a meaningful issue. 82 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $2,500.
At what mileage does the powertrain typically fail?
Across the 74 complaints that reported odometer mileage, most powertrain failures cluster between 60,000 and 105,000 miles, with the median around 80,000. A quarter of owners report trouble before 60,000; a quarter make it past 105,000. 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/2005/Acura/MDX.
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.