Mercury›Mountaineer›2005›Overview/mercury/mountaineer/2005/base/

2005 Mercury Mountaineer

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

Body SUV

The 2005 Mercury Mountaineer is an SUV that requires 6.0 quarts of 5W-20 API oil. With 82 total owner complaints, this model year sits well below the Mountaineer’s 2002 peak of 390 complaints across its 1996–2010 history, indicating a more moderate reliability standing. Structure issues led the reported concerns, and a single recall was issued.

Model year2010 2009 2008 2007 2006 2005 2004 2003 2002

Quick specs

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

Engine oil capacity6.0 qtOEM · verified

Engine oil type5W-20 APIOEM · verified

Lug nut torque100 ft-lbsOEM · verified

Fitment & sizes

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

From the factory this vehicle uses a BCI 65 · 650 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 65 · 650 CCAOEM · verified

Tire sizeP245-65R17OEM · verified

Service quick specs OEM factory data

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

This engine holds 6.0 qt of 5W-20 API engine oil, SYNTHETIC · 75W-140 · GL-5 in the differential, DOT 3 brake fluid. Torque lug nuts to 100 ft-lbs, the oil drain plug to 19.0 ft-lbs. The firing order is 1-3-7-2-6-5-4-8. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

Lubricants & capacities

Automatic Transmission Fluid	ATF
Automatic Transmission Fluid Capacity	12.4
Brake Fluid	DOT 3
Differential Gear Oil	SYNTHETIC · 75W-140 · GL-5
Differential Gear Oil Capacity	3.6 Pints, Rear
Engine Coolant	USE FORD PREMIUM GOLD COOLANT
Engine Oil	5W-20 · API
Engine Oil Capacity	6.0 qt

Engine torques

Intake Manifold to Engine Bolts	7.4 ft-lbs
Exhaust Manifold to Cylinder Head Bolts	16 ft-lbs
Intake Manifold to Engine Bolts	18 ft-lbs
Exhaust Manifold to Cylinder Head Bolts	15 ft-lbs
Engine Oil Pan Drain Plug	17.0-22.0 ft-lbs
Engine Oil Pan Drain Plug	19.0 ft-lbs
Engine Oil Pan Drain Plug	19.0 ft-lbs
Oil Pump to Cylinder BLock Bolts/Studs	14 ft-lbs

Chassis torques

Lug Nuts	100 ft-lbs
Transfer Case Fill Plug	4WD: 18.0, With AWD: 13.0 ft-lbs
Transfer Case Drain Plug	4WD: 18.0, With AWD: 13.0 ft-lbs

Ignition

Cylinder Firing Order	1-4-2-5-3-6
Cylinder Firing Order	1-3-7-2-6-5-4-8
Spark Plug Manufacturer	Motorcraft
Spark Plug Gap	0.052-0.056 in
Spark Plug Torque	13.0 ft-lbs
Spark Plug Manufacturer	Motorcraft
Spark Plug Gap	0.052-0.056 in
Spark Plug Torque	11.0 ft-lbs

Battery & A/C

Refrigerant	R134a
Refrigerant Capacity	Less auxiliary A/C, 2.50. With auxiliary A/C, 3.50. lbs
Oil Group	PAG
Oil Type	46
Oil Capacity	Less auxiliary A/C, 9.00. With auxiliary A/C, 13.00. oz
Standard BCI Group Number	65
Standard BCI Cranking Performance	650 cca
Standard BCI Group Number	65

Service checks

Pressure Test	20 psi
Radiator Cap Pressure Relief	18-22 psi
Thermostat Opening Temperature	194-201 °F
Key ON Engine OFF (KOEO)	30-40
RPM	30-40 @ Idle rpm
Key ON Engine OFF (KOEO)	30-40
RPM	30-40 @ Idle rpm
Key ON Engine OFF (KOEO)	35-45

Brakes

Torque Caliper to Bracket	24 ft-lbs
Torque to Knuckle	100 ft-lbs
Torque Caliper to Bracket	24 ft-lbs
Minimum Pad Thickness	Front: 0.118; Rear: 0.118 in
Rotor Minimum Machining	0.98 in
Rotor Discard at or Under	0.96 in
Rotor Minimum Machining	0.45 in
Rotor Discard at or Under	0.43 in

Multi-step torque procedures OEM · verified

Connecting Rod (Large End) Bearings — tightening sequence 1 stages

15 ft. lbs., Step 2: 90

15 ft. lbs

Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages

33 ft. lbs., step 2: 85 degrees SOHC

33 ft. lbs

Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages

66 ft. lbs., step 2: loosen one turn 37 ft. lbs., step 3: 90 degrees, must not exceed 148 ft. lbs.(200Nm).

66 ft. lbs

Cylinder Head — tightening sequence 3 stages

1	26 ft. lbs.	26 ft. lbs
2	90 degrees	90 degrees
3	90 degrees	90 degrees

Cylinder Head — tightening sequence 3 stages

1	26 ft. lbs.	26 ft. lbs
2	90 degrees	90 degrees
3	90 degrees	90 degrees

Cylinder Head — tightening sequence 6 stages

1	30 ft. lbs.	30 ft. lbs
2	90 degrees	90 degrees
3	loosen 1 turn
4	30 ft. lbs.	30 ft. lbs
5	90 degrees	90 degrees
6	90

Engine Flywheel Bolts — tightening sequence 1 stages

10 ft. lbs., Step 2: 52

10 ft. lbs

Main Bearings — tightening sequence 1 stages

25 ft. lbs., Step 2: 67-75

25 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 5,000 mi; spark plugs every 100,000 mi; coolant every 50,000 mi. The big-interval services (every 50,000 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 5,000 mi	Engine Oil (drain & refill) · Engine Oil Filter (replace) · Tire & Wheel Assembly (rotate)
Every 15,000 mi	Brake System (inspect) · Cabin Air Filter (replace) · Engine Coolant System Hoses (inspect) · Steering System (inspect) · Suspension System (inspect) · Wheel Bearing (inspect)
Every 30,000 mi	Engine Air Filter Element (replace) · Exhaust System (Complete) (inspect) · Fuel Filter (replace) · Temperature Controlled Seat Air Filter (replace)
Every 50,000 mi	Engine Coolant System (drain, flush & refill)
At 100,000 mi	Engine Coolant System (drain, flush & refill)
Every 100,000 mi	PCV Valve (replace) · Spark Plugs (replace)
At 150,000 mi	Accessory Drive Belt (inspect) · Drive Axle Assembly (drain & refill) · Transfer Case Assembly (drain & refill) · Transmission Fluid & Filter (replace)

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 Mercury Mountaineer sits at a notable inflection point in this generation's record. Complaints peaked at 390 in 2002, remained elevated at 210 in 2004, then dropped sharply to 82 in 2005—its lowest complaint level since 2001 (22). Recalls similarly fell to just 1 in 2005, down from 8 in 2000 and 4 in 2002, with no investigations opened that year. Technical Service Bulletins dropped to 49, roughly half the volume seen in 2002–2004. The top complaint areas were Structure (21), Power Train (12), and Vehicle Speed Control (10), with 6 crash-related complaints and zero fire complaints recorded. By contrast, the generation's early years (1997–2000) saw dramatically higher complaint volumes (166–369) and multi-investigation activity. The 2005 model represents the tail end of a stabilization arc that followed the 2002 spike. **This is a comparatively favorable year within the generation: complaints and recall activity are suppressed, and the vehicle sits beyond the problematic early-cycle period while remaining well before the generation's end.** However, the 6 crash complaints warrant careful pre-purchase inspection of the structure and speed control systems specifically.

Open recalls

NHTSA campaigns

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

Owner complaints

6 involved a crash · 0 a fire

NHTSA crash-test rating federal NCAP · out of 5 stars

Rollover★★★★★

Owner complaints by model year NHTSA · this generation & adjacent

’96 ’97 ’98 ’99 ’00 ’01 ’02 ’03 ’04’05’06 ’07 ’08 ’09 ’10

Owner complaints filed with NHTSA, by component

All 82 complaints on record, top 8 components.

Structure21

Power Train12

Vehicle Speed Control10

Unknown Or Other4

Engine4

Electrical System3

Steering3

Power Train,Structure3

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

07E104000Visibility:Glass, Side/RearReported 11/12/2007

CERTAIN CURVED TEMPERED REPLACEMENT GLASS MANUFACTURED BY HANGZHOU SAFETY GLASS LTD AND SUPPLIED TO SAFELITE BY AUTO TEMP INC., IDENTIFIED AS DOT-430, AND SOLD FOR USE ON CERTAIN DOMESTIC AND FOREIGN VEHICLES MAY NOT… Remedy: SAFELITE WILL NOTIFY ITS RETAIL CUSTOMERS AND REPLACE THE GLASS FREE OF CHARGE. RETAIL CUSTOMERS CAN CONTACT SAFELITE TOLL FREE AT 1-888-843-2906. SAFELITE WILL NOTIFY ITS…

Technical service bulletins NHTSA · verified

Showing 5 of 49 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
TSB 19-2026	2019-02-07	Structure	Some 2000 and newer Ford, Lincoln and Mercury vehicles equipped with aluminum body panels…
TSB 19-2026	2019-02-07	Structure	Some 2000 and newer Ford, Lincoln and Mercury vehicles equipped with aluminum body panels…
SSM 46085	2016-09-21	Engine And Engine Cooling	The Powertrain Control/Emissions Diagnosis (PC/ED) manual has been revised for diagnosing…
TSB-12-7-4	2012-07-10	Engine	FORD/LINCOLN/MERCURY: IF BATTERY WAS DISCONNECTED OR DEAD, VEHICLES/TRUCKS MAY EXPERIENCE…
TSB-08-19-3	2009-05-01	Power Train	FORD: SOME VEHICLES MAY EXHIBIT OIL SEPARATION FROM THE INTERNAL LUBE FOUND IN THE…

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 Mountaineer. 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.

Group 65 battery Vehicles taking 6.0 qt

Reference guides

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

Vehicle recalls & TSBs OBD-II trouble codes Torque specifications Maintenance schedules Fluid capacities & specs

Frequently asked

How much oil does the 2005 Mountaineer take?

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

Does the 2005 Mountaineer have open recalls?

NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.