MercuryMariner Hybrid2009Overview/mercury/mariner-hybrid/2009/base/

2009 Mercury Mariner Hybrid

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2009 Mariner Hybrid.

Body SUVTransmission Automatic (variable gear ratios)

The 2009 Mercury Mariner Hybrid is an SUV built on a hybrid electric platform featuring an automatic transmission with variable gear ratios, powered by a powertrain that requires 5.0 quarts of 5W-20 API oil; its fuel efficiency is notable at 29 mpg city, 27 mpg highway, and 28 mpg combined according to EPA estimates. In terms of reliability, this model year recorded 21 total owner complaints with steering being the primary concern, and notably, it had zero recalls. Within the Mariner Hybrid's production span from 2006 to 2012, 2009 falls toward the lower end of the complaint spectrum—the 2010 model year peaked at 278 complaints while 2012 dropped to just 1—suggesting this particular year represents a relatively stable period in the vehicle's service history.

Model year201120102009200820072006

Quick specs

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

Engine oil capacity5.0 qtOEM · verified
Engine oil type5W-20 APIOEM · verified
Lug nut torque100 ft-lbsOEM · verified
EPA fuel economy29/27/28 mpgEPA · verified

Fitment & sizes

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

From the factory this vehicle uses a BCI 96R · 500 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 96R · 500 CCAOEM · verified
Tire sizeP235-70R16OEM · verified

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic (variable gear ratios)

Ratings & economy EPA / vPIC

EPA city / highway / combined29 / 27 / 28 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 5.0 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 Capacity9
Brake FluidDOT 3
Engine CoolantUSE FORD PREMIUM GOLD COOLANT
Engine Oil5W-20 · API
Engine Oil Capacity5.0 qt
Engine Oil5W-20 · API
Engine Oil Capacity6.0 qt

Engine torques

Camshaft Bearing/Carrier Cap Bolts or Studs7 ft-lbs
Engine Flywheel Bolts59 ft-lbs
Intake Manifold to Engine Bolts13 ft-lbs
Intake Manifold to Engine Bolts7.4 ft-lbs
Engine Oil Pan Drain Plug18.0 ft-lbs
Oil Pump to Cylinder BLock Bolts/Studs7 ft-lbs

Chassis torques

Lug Nuts100 ft-lbs
Transfer Case Fill Plug25.0 ft-lbs
Front Wheel Hub222 ft-lbs
Rear Wheel Hub221 ft-lbs

Ignition

Cylinder Firing Order1-3-4-2
Cylinder Firing Order1-4-2-5-3-6
Spark Plug ManufacturerMotorcraft

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.57 lbs
Oil GroupPAG
Oil Type46
Oil Capacity5.00 oz
RefrigerantR134a
Refrigerant Capacity2.00-2.56 lbs
Standard BCI Group Number96R

Service checks

Pressure Test21 psi
Radiator Cap Pressure Relief17-21 psi
Thermostat Opening Temperature194 °F
Pressure Test21 psi
Radiator Cap Pressure Relief17-21 psi
Thermostat Opening Temperature183-190 °F
Key ON Engine OFF (KOEO)55
Key ON Engine OFF (KOEO)55

Brakes

Torque Caliper to Bracket37 ft-lbs
Torque to Knuckle129 ft-lbs
Minimum Pad ThicknessFront: 0.118; Rear: 0.039 in
Rotor Runout Limit0.002 in
Rotor Discard at or Under0.944 in
Drum Discard at-or-over10.09

Multi-step torque procedures OEM · verified

Camshaft Bearing/Carrier Cap Bolts or Studs — tightening sequence 1 stages
1Tighten all bolts finger tight., Step 25 ft. lbs
Connecting Rod (Large End) Bearings — tightening sequence 1 stages
121 ft. lbs., Step 2: 9021 ft. lbs
Connecting Rod (Large End) Bearings — tightening sequence 1 stages
117 ft. lbs., Step 2: 3217 ft. lbs
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
189 ft. lbs., step 2: 360 degrees, step 4: 37 ft. lbs., step 5: 9089 ft. lbs
Cylinder Head — tightening sequence 5 stages
1Tighten in sequence shown 3.7 ft. lbs.3.7 ft. lbs
2Tighten in sequence shown 11 ft. lbs.11 ft. lbs
3Tighten in sequence shown 33 ft. lbs.33 ft. lbs
490 degrees90 degrees
590 degrees; Do not re-use old bolts.90 degrees
Cylinder Head — tightening sequence 5 stages
1Tighten in sequence shown 3.7 ft. lbs.3.7 ft. lbs
2Tighten in sequence shown 11 ft. lbs.11 ft. lbs
3Tighten in sequence shown 33 ft. lbs.33 ft. lbs
490 degrees90 degrees
590 degrees; Do not re-use old bolts.90 degrees
Cylinder Head — tightening sequence 6 stages
130 ft. lbs.30 ft. lbs
290 degrees90 degrees
3loosen one full turn
430 ft. lbs.30 ft. lbs
590 degrees90 degrees
690 degrees; Do not re-use old bolts.90 degrees
Engine Flywheel Bolts — tightening sequence 1 stages
137 ft. lbs., Step 2: 59 ft. lbs., Step 3: 8337 ft. lbs
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
1Install 7 new exhaust manifold stud12.5 ft. lbs
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
1Install 6 new exhaust manifold stud9 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 7,500 mi; spark plugs every 90,000 mi; coolant every 45,000 mi. The big-interval services (every 45,000 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) · Engine Oil Filter (replace) · Tire & Wheel Assembly (rotate)
Every 10,000 miHybrid Battery Compartment Air Filter (inspect)
Every 15,000 miBrake System (inspect) · CV Joint Boot (inspect) · Cabin Air Filter (replace) · Driveshaft (inspect) · Driveshaft U-Joint (inspect) · Engine Coolant System (leak inspection)
Every 30,000 miAccessory Drive Belt (inspect) · Engine Air Filter Element (replace) · Temperature Controlled Seat Air Filter (replace)
Every 45,000 miEngine Coolant System (drain, flush & refill)
At 90,000 miAccessory Drive Belt (inspect)
Every 90,000 miSpark Plugs (replace)
At 105,000 miEngine Coolant System (drain, flush & refill) · PCV Valve (replace)
At 150,000 miDrive Axle Assembly (drain & refill) · Drive Belt (replace) · Transfer Case Assembly (drain & refill) · Transmission Fluid & Filter (replace) · Wheel Bearing (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 2009 Mercury Mariner Hybrid sits at the lowest point in the generation's federal complaint record, with just 21 complaints, zero recalls, two open investigations, and only two TSBs. This is a sharp drop from 2008, which logged 116 complaints and two investigations, and it immediately precedes 2010, when complaints surged to 278, recalls hit three, investigations rose to four, and TSBs jumped to 35. Within this arc, 2009 looks like a relative calm year between two higher-complaint periods, although the data does not specify why complaints fell or what drove the spikes in neighboring years. Its leading complaints were steering (8), engine (3), vehicle speed control (2), and a combined electrical/vehicle speed control/fuel-propulsion category (2), with two crash-related complaints and no fire complaints. Because 2009 carries the lowest complaint volume and no recalls in this federal record, it appears to be the most statistically attractive year of this generation to buy.

0
Open recalls
NHTSA campaigns
2
Service bulletins
Manufacturer communications
2
ODI investigations
Office of Defects Investigation
21
Owner complaints
2 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

Owner complaints filed with NHTSA, by component

All 21 complaints on record, top 8 components.

Steering8
Engine3
Vehicle Speed Control2
Electrical System,Vehicle Speed Control,Fuel/Propulsion System2
Power Train,Vehicle Speed Control,Engine1
Vehicle Speed Control,Fuel/Propulsion System1
Service Brakes1
Electrical System,Electronic Stability Control (Esc),Service Brakes1

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 2 of 2 bulletins on record with NHTSA.

BulletinDateComponentSummary
ASI-222422012-03-01Service Brakes, HydraulicFORD/MERCURY: SOME HYBRID VEHICLES MAY REQUIRE A UNIQUE BLEED PROCEDURE AFTER A…
TSB-09-15-12009-12-09Traction Control SystemFORD/MERCURY: TRACTION CONTROL LIGHT WITH DTC C1440. SOME VEHICLES BUILT MAY EXHIBIT 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 Mariner Hybrid. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
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 2009 Mariner Hybrid take?

5.0 qt of 5W-20 API MEETING FORD SPECIFICATION WSS-M2C945-A, per the factory manual.

Does the 2009 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 29 city / 27 highway / 28 combined mpg.