AcuraMDX2005Overview/acura/mdx/2005/base/

2005 Acura MDX

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2005 MDX.

Body SUVTransmission Automatic 5-spd

The 2005 Acura MDX is a first-generation luxury SUV that pairs a gasoline V6 with a five-speed automatic transmission, returning EPA fuel economy of 15 mpg city, 21 mpg highway, and 17 mpg combined, with routine service requiring 4.5 quarts of 5W-20 API-spec oil. Across the model's full complaint history spanning 2001 through 2026, this model year's 180 owner complaints sit well below the 360-complaint peak recorded for 2016, placing it in the lower-moderate tier of the MDX's reliability record — though its 13 recalls and power train as the top complaint area signal that drivetrain durability remains the primary watchpoint for owners and researchers.

Model year20262024202320222020201920182005

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity4.5 qtOEM · verified
Engine oil type5W-20 APIOEM · verified
Lug nut torque80 ft-lbsOEM · verified
EPA fuel economy15/21/17 mpgEPA · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 24F · 550 CCA battery. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 24F · 550 CCAOEM · verified
Tire sizeP235-65TR17OEM · verified
Wheel / rim6.5-JJ inOEM · verified

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 5-spd

Dimensions & weight NHTSA vPIC

Overall length188.2 in
Overall width77.2 in
Overall height71.3 in
Wheelbase106.3 in
Curb weight4392 lb
Track (front / rear)66.5 / 66.5 in
Weight distribution (front / rear)52/48

Ratings & economy EPA / vPIC

EPA city / highway / combined15 / 21 / 17 mpg
Drivetrain4-Wheel or All-Wheel Drive
Recommended fuelPremium Gasoline

Performance & power Independent road tests

0–60 mph, quarter-mile, horsepower and torque from independent road tests.

Independent road tests for the MDX of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.

7.6–8.4 sec0–60 mph (tested)quickest 7.60 sec — 2001 Touring w/Nav
YearTrim / engine0–60¼ mileHPDrivetrain
2003Touring w/Nav & Entertainment 3.5L V67.80 sec16.10 sec260 hpAWD
2001Touring w/Nav 3.5L V67.60 sec15.90 sec240 hpAWD
2001Touring w/Nav 3.5L V68.10 sec16.30 sec240 hpAWD
2001Touring w/Nav 3.5L V68.40 sec16.60 sec240 hpAWD

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 4.5 qt of 5W-20 API engine oil, DOT 3 brake fluid. Torque lug nuts to 80 ft-lbs, the oil drain plug to 29.0 ft-lbs. The firing order is 1-4-2-5-3-6.

Lubricants & capacities

Automatic Transmission FluidATF
Automatic Transmission Fluid Capacity3.3
Brake FluidDOT 3
Differential Gear Oil Capacity5.5 Pints
Engine Oil5W-20 · API
Engine Oil Capacity4.5 qt
Transfer Case Fluid80W-90 · API · GL-4 · GL-5
Transfer Case Fluid Capacity0.8 Pints

Engine torques

Engine Flywheel Bolts54 ft-lbs
Engine Oil Pan Drain Plug29.0 ft-lbs
Engine Oil Pan Drain Plug29.0 ft-lbs
Oil Pump to Cylinder BLock Bolts/Studs9 ft-lbs
Engine Valve Cover Bolts8.9 ft-lbs

Chassis torques

Driveshaft Flange to Transmission53.0 ft-lbs
Lug Nuts80 ft-lbs
Transfer Case Fill Plug35.0 ft-lbs
Transfer Case Drain Plug35.0 ft-lbs
Front Wheel Hub210 ft-lbs
Rear Wheel Hub181 ft-lbs

Ignition

Cylinder Firing Order1-4-2-5-3-6
Curb Idle Speed (No Load)730 rpm
Curb Idle Speed Variance (No Load)50 rpm
Spark Plug ManufacturerHonda
Spark Plug Gap0.039-0.0.043 in
Spark Plug Torque13.0 ft-lbs
Ignition Timing10 degrees
Ignition Timing Acceptable Variance2 degrees

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.27-1.38 lbs
Oil TypePAG 46
Oil Capacity6.00 oz
Standard BCI Group Number24F
Standard BCI Cranking Performance550 cca

Service checks

Pressure Test14-18 psi
Radiator Cap Pressure Relief14-18 psi
Thermostat Opening Temperature169-176 °F
Pressure Test14-18 psi
Radiator Cap Pressure Relief14-18 psi
Thermostat Opening Temperature169-176 °F
Regulated Fuel System Pressure (With Vacuum)57.0-64.0 psi
Engine Compression135 minimum PSI. 28 maximum variation PSI.

Brakes

Torque Caliper to Bracket27 ft-lbs
Torque to Knuckle80 ft-lbs / 41 ft-lbs
Minimum Pad Thickness0.060 in
Rotor Max Parallel Variation0.0006 in
Rotor Runout Limit0.004 in
Rotor Nominal Thickness From1.098 in / 0.429 in
Rotor Nominal Thickness To1.106 in / 0.437 in
Rotor Discard at or Under1.024 in / 0.354 in

Multi-step torque procedures OEM · verified

Connecting Rod (Large End) Bearings — tightening sequence 1 stages
114 ft. lbs., Step 2: 9014 ft. lbs
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
147 ft. lbs., step 2: 6047 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 7,500 mi; spark plugs at 105,000 mi; coolant at 120,000 mi. The big-interval services (at 120,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

Every 7,500 miEngine Oil (drain & refill) · Tire & Wheel Assembly (rotate)
At 15,000 miDrive Axle Assembly (drain & refill)
Every 15,000 miBrake Line (inspect) · Brake Linings (inspect) · Brake Pedal Assembly (inspect) · CV Joint Boot (inspect) · Engine Oil Filter (replace) · Exhaust System (Complete) (inspect)
Every 30,000 miAccessory Drive Belt (inspect) · Cabin Air Filter (replace) · Drive Axle Assembly (drain & refill) · Engine Air Filter Element (replace) · Transfer Case Assembly (drain & refill) · Transmission Assembly (drain & refill)
At 45,000 miTransfer Case Assembly (drain & refill) · Transmission Assembly (drain & refill)
At 105,000 miEngine Valves (inspect valve lash) · Spark Plugs (replace) · Timing Belt (replace) · Water Pump (inspect)
At 120,000 miEngine Coolant System (drain, flush & refill)
At 180,000 miEngine Coolant System (drain, flush & refill)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

The 2005 Acura MDX recorded 180 federal complaints and 13 recalls, with power train (69) and air bag (28) issues comprising the bulk of the reports. Across the first generation (2001-2006), complaints trended downward from a high of 224 in 2001, yet 2005 represents a slight regression compared to the 171 complaints seen in 2004. Sitting late in the generation's lifecycle, 2005 ties 2003 for the highest recall count of this era at 13, alongside 5 investigations, implying that while early-production quirks were largely smoothed out, significant regulatory and safety concerns persisted. Although the data does not specify the root causes for the power train and air bag complaints, the 15 associated crash complaints and 1 fire complaint underscore notable safety implications for this specific year. Given this elevated recall volume and the fact that the subsequent 2006 model saw complaints plummet to just 87, the 2005 MDX is a less favorable purchase; buyers should prioritize the 2006 model for a more reliable conclusion to this generation.

13
Open recalls
NHTSA campaigns
98
Service bulletins
Manufacturer communications
5
ODI investigations
Office of Defects Investigation
180
Owner complaints
15 involved a crash · 1 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Rollover★★★★

Owner complaints filed with NHTSA, by component

All 180 complaints on record, top 8 components.

Power Train69
Air Bags28
Electrical System8
Electronic Stability Control (Esc)6
Seat Belts4
Engine & Engine Cooling,Power Train4
Unknown Or Other3
Air Bags,Seat Belts3

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 13 campaigns on record for this vehicle.

19V182000Air Bags:Frontal:Driver Side:Inflator ModuleReported 06/03/2019

Honda (American Honda Motor Co.) is recalling specific 2003 Acura 3.2CL, 2013-2016 ILX, 2013-2014 ILX Hybrid, 2003-2006 MDX, 2007-2016 RDX, 2002-2003 3.2TL, 2004-2006, and 2009-2014 TL, 2010-2013 ZDX and 2001-2007 and… Remedy: Honda will notify owners, and dealers will replace the driver's air bag inflator with an alternate inflator, free of charge. The recall began April 10, 2019. Honda owners may…

19E068000Vehicle Speed Control:Accelerator PedalReported 10/10/2019

Dorman Products, Inc. (Dorman) is recalling certain Accelerator Pedal Assemblies part numbers 699-114 and 825-5029-1, sold as replacement parts for 2003-2006 Acura MDX, 2004-2008 Acura TL and TSX, 2003-2007 Honda… Remedy: Dorman will notify owners, and qualified service facilities will replace the affected accelerator pedal assemblies, free of charge. The recall began December 9, 2019. Owners may…

Technical service bulletins NHTSA · verified

Showing 5 of 98 bulletins on record with NHTSA.

BulletinDateComponentSummary
B18-0232026-06-30Air BagsService Bulletin - Warranty Extension: Customer Support Program For Front Passenger's…
B23040A2023-05-17Electrical SystemService News - The navigation clock and date are incorrect. This is due to a limited GPS…
B21120A2022-01-25Electrical SystemServiceNews Article - The clock shows the incorrect time. This issue is due to a limited…
DOR-M3J3F-072020-06-03Engine And Engine CoolingThese SKUs are Exhaust Manifolds with Catalytic Converters. The customer communication…
B20-0072020-03-10Air BagsService Bulletin - This bulletin is a notification of a class action settlement relating…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific MDX. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Reference guides

Cross-vehicle references for the kinds of data on this page.

Frequently asked

How much oil does the 2005 MDX take?

4.5 qt of 5W-20 API, per the factory manual.

Does the 2005 MDX have open recalls?

NHTSA lists 13 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the MDX get?

EPA figures are 15 city / 21 highway / 17 combined mpg.