MercuryMariner Hybrid2006Overview/mercury/mariner-hybrid/2006/base/

2006 Mercury Mariner Hybrid

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2006 Mariner Hybrid.

Body SUVTransmission Automatic (variable gear ratios)

The 2006 Mercury Mariner Hybrid is a compact SUV that pairs a gasoline engine with an electric drive system, using an automatic transmission with variable gear ratios to deliver an EPA-rated 28 mpg city, 26 mpg highway, and 27 mpg combined. Its 4.5‑quart oil capacity requires 5W‑20 API viscosity oil. With only 38 total owner complaints and zero recalls, this first model year stands as the second‑lowest complaint count in the Mariner Hybrid’s 2006–2012 production run, well below the 2010 peak of 278 complaints, though the top complaint area—service brakes—warrants attention for researchers examining early hybrid SUV reliability.

Model year201120102009200820072006

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 torque100 ft-lbsOEM · verified
EPA fuel economy28/26/27 mpgEPA · verified

Fitment & sizes

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

From the factory this vehicle uses a BCI 40R · 590 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 40R · 590 CCAOEM · verified
Tire size225-70R15OEM · verified

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic (variable gear ratios)

Ratings & economy EPA / vPIC

EPA city / highway / combined28 / 26 / 27 mpg
Drivetrain4-Wheel or All-Wheel Drive
Recommended fuelRegular Gasoline

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 100 ft-lbs, the oil drain plug to 18.0 ft-lbs. The firing order is 1-4-2-5-3-6. 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 FluidFord Mercon LV
Automatic Transmission Fluid Capacity5
Brake FluidDOT 3
Engine CoolantUSE FORD PREMIUM GOLD COOLANT
Engine Oil5W-20 · API
Engine Oil Capacity4.5 qt
Engine Oil5W-20 · API
Engine Oil Capacity6.0 qt

Engine torques

Intake Manifold to Engine Bolts13 ft-lbs
Exhaust Manifold to Cylinder Head Bolts40 ft-lbs
Intake Manifold to Engine Bolts7.4 ft-lbs
Exhaust Manifold to Cylinder Head Bolts15 ft-lbs
Engine Oil Pan Drain Plug21.0 ft-lbs
Engine Oil Pan Drain Plug21.0 ft-lbs
Engine Oil Pan Drain Plug18.0 ft-lbs

Chassis torques

Lug Nuts100 ft-lbs
Transfer Case Fill PlugAT: 12.0, MT: 35.0 ft-lbs
Transfer Case Drain Plug7.0 ft-lbs
Front Wheel Hub214 ft-lbs
Rear Wheel Hub214 ft-lbs
Front Wheel Hub214 ft-lbs
Rear Wheel Hub214 ft-lbs

Ignition

Cylinder Firing Order1-3-4-2
Cylinder Firing Order1-4-2-5-3-6
Spark Plug ManufacturerMotorcraft
Spark Plug Gap0.042-0.046 in
Spark Plug Torque11.0 ft-lbs
Spark Plug ManufacturerMotorcraft
Spark Plug Gap0.049-0.053 in
Spark Plug Torque9.0 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity2.00 lbs
Oil GroupPAG
Oil Type46
Oil Capacity7.00 oz
RefrigerantR134a
Standard BCI Group Number40R
Standard BCI Cranking Performance590 cca

Service checks

Pressure Test20 psi
Radiator Cap Pressure Relief17-21 psi
Thermostat Opening Temperature194 °F
Pressure Test20 psi
Radiator Cap Pressure Relief17-21 psi
Thermostat Opening Temperature183-190 °F
Key ON Engine OFF (KOEO)39
RPM39 @ Idle rpm

Brakes

Torque Caliper to Bracket33 ft-lbs / 26 ft-lbs
Torque to Knuckle129 ft-lbs
Minimum Pad ThicknessFront: 0.118; Rear: 0.118 in
Minimum Shoe Thickness0.039 in
Rotor Minimum Machining0.968 in / 0.88 in / 0.456 in
Rotor Discard at or Under0.944 in / 0.86 in / 0.433 in
Drum Discard at-or-over9.05

Multi-step torque procedures OEM · verified

Camshaft Bearing/Carrier Cap Bolts or Studs — tightening sequence 1 stages
15 ft. lbs., Step 2: 12.15 ft. lbs
Connecting Rod (Large End) Bearings — tightening sequence 1 stages
121 ft. lbs., Step 2: 9021 ft. lbs
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
174 ft. lbs., step 9074 ft. lbs
Cylinder Head — tightening sequence 5 stages
13.7 ft. lbs.3.7 ft. lbs
211 ft. lbs.11 ft. lbs
333 ft. lbs.33 ft. lbs
490 degrees90 degrees
590
Cylinder Head — tightening sequence 5 stages

Prep Do not reuse old bolts. Coat bolt threads with clean engine oil.

137.0 ft. lbs.37 ft. lbs
2Loosen 360 degrees360 degrees
322.0 ft. lbs.22 ft. lbs
490 degrees90 degrees
590 degrees90 degrees
Engine Flywheel Bolts — tightening sequence 1 stages
137 ft. lbs., Step 2: 59 ft. lbs., Step 3: 8337 ft. lbs
Main Bearings — tightening sequence 1 stages
14 ft. lbs., Step 2: 18 ft. lbs., Step 3: 904 ft. lbs
Oil Pump to Cylinder BLock Bolts/Studs — tightening sequence 1 stages
17 ft. lbs., Step 2: 157 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 miEngine Oil (drain & refill) · Engine Oil Filter (replace) · Tire & Wheel Assembly (rotate)
Every 10,000 miHybrid Battery Compartment Air Filter (inspect)
Every 15,000 miBrake System (inspect) · Cabin Air Filter (replace) · Driveshaft U-Joint (inspect) · Engine Coolant System (leak inspection) · Engine Coolant System Hoses (inspect) · Steering Linkage (inspect)
Every 30,000 miEngine Air Filter Element (replace) · Exhaust System (Complete) (inspect) · Exhaust System Heat Shield (inspect) · Fuel Filter (replace) · Temperature Controlled Seat Air Filter (replace)
Every 50,000 miEngine Coolant System (drain, flush & refill)
At 100,000 miEngine Coolant System (drain, flush & refill)
Every 100,000 miAccessory Drive Belt (inspect) · PCV Valve (replace) · Spark Plugs (replace)
At 150,000 miDrive Axle Assembly (drain & refill) · Drive Belt (replace) · 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 2006 Mercury Mariner Hybrid sits at the beginning of a federal record arc that shows relatively modest early activity before escalating significantly in subsequent years. With 38 complaints, zero recalls, one investigation, and 13 TSBs, the 2006 model year registers fewer complaints than the 2008 spike of 116 and far below the generation’s 2010 peak of 278 complaints, three recalls, and four investigations. Compared to 2007, which saw 31 complaints, the 2006 volume is slightly higher but remains well within the generation’s lowest tier alongside 2009 and 2012. The 2006 data shows owner-reported concerns concentrated in service brakes, engine, and steering categories, with three crash-related and one fire-related complaint, though the data does not specify root causes. Because it predates the substantial recall and investigation activity that surfaces in 2010, the 2006 model appears to reflect a less troubled point in this model run. For a buyer prioritizing lower federal-filed complaint volume and zero recalls within this dataset, the 2006 model presents a comparatively favorable option among these model years.

0
Open recalls
NHTSA campaigns
13
Service bulletins
Manufacturer communications
1
ODI investigations
Office of Defects Investigation
38
Owner complaints
3 involved a crash · 1 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Rollover★★★★★
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 38 complaints on record, top 8 components.

Service Brakes8
Engine4
Steering3
Power Train,Electrical System,Engine3
Hybrid Propulsion System2
Power Train2
Steering,Electrical System2
Electrical System2

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.

Technical service bulletins NHTSA · verified

Showing 5 of 13 bulletins on record with NHTSA.

BulletinDateComponentSummary
SSM 460852016-09-21Engine And Engine CoolingThe Powertrain Control/Emissions Diagnosis (PC/ED) manual has been revised for diagnosing…
SSM-458702016-06-08Service Brakes, Hydraulic2005-2008 ESCAPE/MARINER HYBRID - ANTI-LOCK BRAKE SYSTEM (ABS) WARNING INDICATOR…
ASI-222422012-03-01Service Brakes, HydraulicFORD/MERCURY: SOME HYBRID VEHICLES MAY REQUIRE A UNIQUE BLEED PROCEDURE AFTER A…
TSB-09-19-122010-04-01Power TrainFORD: SOME HYBRID VEHICLES MAY EXHIBIT AN INTERMITTENT RED TRIANGLE ON AND STOP SAFELY…
TSB-09-15-32009-12-01Engine And Engine CoolingFORD/MERCURY: SOME VEHICLES MAY SET DIAGNOSTIC TROUBLE CODES (DTCS) P0A81 (BATTERY PACK…

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

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VIN
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Recalls
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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 2006 Mariner Hybrid take?

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

Does the 2006 Mariner Hybrid have open recalls?

NHTSA lists 0 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the Mariner Hybrid get?

EPA figures are 28 city / 26 highway / 27 combined mpg.