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2006 Mercury Grand Marquis

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

Body PASSENGER CARTransmission Automatic 4-spd

Classified as a passenger car, the 2006 Mercury Grand Marquis utilizes a 4-speed automatic transmission to deliver EPA fuel economy ratings of 15/23/18 mpg while requiring 6.2 quarts of 5W-20 API oil for maintenance. Within the model's complaint history spanning 1990 to 2011, this year registered 142 total owner complaints and 3 recalls, representing a significant reduction from the peak of 487 complaints recorded in 2005. Although vehicle speed control remains the top complaint area, the data indicates a stabilized reliability profile that improved markedly on the previous year's issues without reaching the lowest complaint count of 9 achieved in 2011.

Model year2011 2010 2009 2008 2007 2006 2005 2004 2003

Quick specs

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

Engine oil capacity6.2 qtOEM · verified

Engine oil type5W-20 APIOEM · verified

Lug nut torque100 ft-lbsOEM · verified

EPA fuel economy15/23/18 mpgEPA · 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 sizeP225-60TR16OEM · verified

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

Transmission

Automatic 4-spd

Ratings & economy EPA / vPIC

EPA city / highway / combined	15 / 23 / 18 mpg
Drivetrain	Rear-Wheel Drive
Passenger volume	109 cu ft
Cargo volume	21 cu ft
Recommended fuel	Regular Gasoline

Service quick specs OEM factory data

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

This engine holds 6.2 qt of 5W-20 API engine oil, 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	13.9
Brake Fluid	DOT 3
Engine Coolant	USE FORD PREMIUM GOLD COOLANT
Engine Oil	5W-20 · API
Engine Oil Capacity	6.2 qt
Power Steering Fluid	ATF

Engine torques

Camshaft Bearing/Carrier Cap Bolts or Studs	7.4 ft-lbs
Camshaft Bearing/Carrier Cap Bolts or Studs	7.4 ft-lbs
Engine Flywheel Bolts	59 ft-lbs
Engine Flywheel Bolts	60-64 ft-lbs
Intake Manifold to Engine Bolts	7.4 ft-lbs
Exhaust Manifold to Cylinder Head Bolts	18 ft-lbs
Engine Oil Pan Drain Plug	19.0 ft-lbs
Engine Oil Pan Drain Plug	19.0 ft-lbs

Chassis torques

Lug Nuts

100 ft-lbs

Ignition

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	11.0 ft-lbs
Ignition Timing	10

Battery & A/C

Refrigerant	R134a
Refrigerant Capacity	1.70 lbs
Oil Group	PAG
Oil Type	46
Oil Capacity	7.00 oz
Standard BCI Group Number	65
Standard BCI Cranking Performance	650 cca
Optional BCI Group Number	65

Service checks

Pressure Test	16 psi
Radiator Cap Pressure Relief	16 psi
Thermostat Opening Temperature	188-195 °F
Key ON Engine OFF (KOEO)	20.0-60.0
Key ON Engine OFF (KOEO)	35-45
RPM	28-45 @ Idle rpm
Engine Oil Pressure	20-45 psi
Engine Oil Pressure RPM	2500 rpm

Brakes

Torque Caliper to Bracket	27 ft-lbs / 25 ft-lbs
Torque to Knuckle	188 ft-lbs / 68 ft-lbs
Minimum Pad Thickness	Front: 0.118; Rear: 0.118 in
Rotor Runout Limit	0.003 in / 0.002 in
Rotor Minimum Machining	1.063 in / 0.732 in
Rotor Discard at or Under	1.037 in / 0.708 in

Multi-step torque procedures OEM · verified

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

18 ft. lbs., Step 2: 33 ft. lbs. Step 3: 90

18 ft. lbs

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

17 ft. lbs., Step 2: 32 ft. lbs., Step 3: 105

17 ft. lbs

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

66 ft. lbs., step 2: 360 degrees, step 3: 37 ft. lbs., step 4: 90

66 ft. lbs

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 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

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 (leak inspection) · Engine Coolant System Hoses (inspect) · Steering System (inspect) · Suspension System (inspect)
Every 30,000 mi	Engine 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 mi	Engine Coolant System (drain, flush & refill)
At 100,000 mi	Engine Coolant System (drain, flush & refill)
Every 100,000 mi	Accessory Drive Belt (inspect) · PCV Valve (replace) · Spark Plugs (replace)
At 150,000 mi	Drive Belt (replace) · 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 Grand Marquis marks a notable improvement in reliability trends within its generation, particularly when viewed alongside the preceding years. Complaints dropped sharply from 487 in 2005 to 142 in 2006, while recalls and investigations also declined, signaling a mid-cycle correction after a peak in reported issues. The 2005 model year saw elevated concerns, particularly in vehicle speed control and airbag systems, which appear to have been addressed by 2006, as these areas remain prominent but reduced in frequency. Compared to 2007 and later, the 2006 model holds a middle ground—better than the high-complaint early 2000s but not yet as refined as the post-2007 models, which show further declines in federal-reported issues. With only 16 crash-related complaints and 2 fire incidents, the 2006 model reflects a stabilizing phase in the generation’s lifecycle. **This makes the 2006 a relatively strong used purchase, assuming prior recalls have been addressed, as it balances improved reliability with remaining service life.**

Open recalls

NHTSA campaigns

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

142

Owner complaints

16 involved a crash · 2 a fire

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

Rollover★★★★★

Owner complaints by model year NHTSA · this generation & adjacent

’90 ’91 ’92 ’93 ’94 ’95 ’96 ’97 ’98 ’99 ’00 ’01 ’02 ’03 ’04 ’05’06’07 ’08 ’09 ’10 ’11

Owner complaints filed with NHTSA, by component

All 142 complaints on record, top 8 components.

Vehicle Speed Control25

Air Bags22

Air Bags,Seat Belts11

Seat Belts9

Steering8

Fuel/Propulsion System8

Exterior Lighting5

Structure4

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 3 campaigns on record for this vehicle.

14V704000Steering:Rack And Pinion:Pinion ShaftReported 05/11/2014

Ford Motor Company (Ford) is recalling certain model year 2005-2011 Ford Crown Victoria, 2005-2011 Mercury Grand Marquis vehicles manufactured March 23, 2004, to August 30, 2011, and 2005-2011 Lincoln Town Car vehicles… Remedy: Ford will notify the owners of vehicles whose repair records reflect that the upper intermediate steering shaft was repaired during the course of the prior recall 13V-385. Dealers…

13V385000SteeringReported 29/08/2013

Ford is recalling certain model year 2005-2011 Ford Crown Victoria (including Crown Victoria Police Interceptors), Mercury Grand Marquis, and Lincoln Town Car vehicles. The affected vehicles are currently registered or… Remedy: Ford will notify owners and dealers will replace the lower intermediate shaft, free of charge. The upper intermediate shaft and steering column lower bearing will be inspected to…

Technical service bulletins NHTSA · verified

Showing 5 of 20 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
DOR-L2Q6V-10	2019-09-18	Electrical System	This SKU is a Radiator Fan. The customer communication requested return of unsold…
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…
TSB160072	2016-04-21	Structure	Inpected or repaired under 13R01 - Requests for recall service action under 13S08

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 Grand Marquis. 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 6.2 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 2006 Grand Marquis take?

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

Does the 2006 Grand Marquis have open recalls?

NHTSA lists 3 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the Grand Marquis get?

EPA figures are 15 city / 23 highway / 18 combined mpg.