2017 Ford Explorer Police Car – Maintenance, Specs, And DIY Upgrades
The 2017 Ford Explorer Police Interceptor Utility (PIU) is a purpose-built machine designed for high-speed durability and long-term reliability. This guide provides a deep dive into its unique heavy-duty components, essential maintenance schedules for retired units, and how to successfully convert or upgrade this vehicle for civilian or off-road use.
Owning a former 2017 ford explorer police car is a different experience than owning the standard civilian model. These vehicles are built to withstand 24/7 operation, but they often come with high idle hours that require a specialized maintenance approach. Whether you just picked one up at an auction or you are looking to beef up your current Explorer with police-spec parts, you are in the right place.
In this guide, we will break down the mechanical “DNA” of this interceptor. We will look at the cooling systems, the heavy-duty suspension, and the notorious Power Transfer Unit (PTU) that every owner needs to monitor. By the end of this article, you will have a clear roadmap for keeping your interceptor on the road for another 100,000 miles.
We are going to move beyond the basics and look at the actual part numbers and failure points that professional fleet mechanics see every day. From the internal water pump challenges to the heavy-duty braking systems, let’s get into the grease and gears of this iconic law enforcement SUV.
Understanding the 2017 ford explorer police car Foundations
The 2017 model year represents a sweet spot for the Police Interceptor Utility. Unlike the civilian version, which focuses on comfort and infotainment, the police variant focuses on thermal management and structural rigidity. It was designed to pass the grueling 75-mph rear-impact crash test, making it one of the safest SUVs on the road.
Under the hood, you typically find the 3.7L Ti-VCT Cyclone V6 or the 3.5L EcoBoost V6. The 3.7L is the workhorse of the fleet, offering 304 horsepower and 279 lb-ft of torque without the complexity of turbochargers. This engine was specifically calibrated for the 2017 ford explorer police car to handle pursuit-level stresses while maintaining a stable idle for hours on end.
One of the most significant upgrades is the cooling package. These cars feature a larger radiator, a dedicated external transmission oil cooler, and a heavy-duty engine oil cooler. These components are essential because police work involves “soak time,” where the engine runs while the vehicle is stationary, generating immense heat that would melt a standard civilian cooling system.
The Heavy-Duty Electrical System
Police vehicles are essentially mobile power plants. The 2017 interceptor comes standard with a 220-amp alternator. This is a massive jump from the standard 150-amp or 175-amp units found in civilian Explorers. This extra headroom is necessary to power light bars, radios, and computers without draining the heavy-duty battery.
If you are a DIYer looking to build an overlanding rig, this high-output alternator is a goldmine. You can run winches, refrigerators, and auxiliary lighting setups without worrying about voltage drops. The wiring harnesses are also beefier, often including pre-run power leads under the center console area for easy accessory integration.
Suspension and Braking Enhancements
The suspension on the interceptor is not just “stiffer.” It features unique subframe mounts, heavy-duty springs, and larger-diameter struts. The goal was to eliminate the “floaty” feeling of a standard SUV and provide a planted feel during high-speed maneuvers. This makes the vehicle handle more like a large sedan than a top-heavy truck.
The brakes are another area of significant divergence. The 2017 interceptor uses larger rotors and specialized brake pads designed for high-heat dissipation. These pads are formulated to resist “brake fade” during repeated hard stops. If you are replacing these, always buy the police-spec pads (look for the “BR” suffix in Ford part numbers) to maintain that stopping power.
Maintaining Your 2017 ford explorer police car
When you buy a retired 2017 ford explorer police car, the odometer only tells half the story. You must check the “Engine Idle Hours” in the digital dash menu. A general rule of thumb used by fleet managers is that one hour of idling is equivalent to approximately 33 miles of driving wear on the engine internals.
The most critical maintenance item is the Power Transfer Unit (PTU). This is the gearbox that sends power to the rear wheels in the All-Wheel Drive (AWD) system. Ford originally labeled the PTU fluid as “lifetime,” but in police service, this fluid often cooks into a thick, black sludge. You should change this fluid every 30,000 miles to prevent catastrophic gear failure.
To change the PTU fluid, you will likely need a suction pump, as many 2017 units do not have a drain plug. You have to suck the old fluid out through the fill hole. Use a high-quality 75W-140 full synthetic gear luster. If you smell a “propane-like” or “rotten egg” odor after a long drive, your PTU is likely overheating and needs immediate attention.
The Internal Water Pump Challenge
Both the 3.7L and 3.5L engines in these vehicles use an internal water pump driven by the timing chain. This is a controversial design because if the pump seal fails, it can leak coolant directly into the oil pan. This creates a “chocolate milk” sludge that can destroy engine bearings in minutes.
As a proactive owner, you must regularly check the weep hole located behind the alternator. If you see any signs of orange or green crusting near that hole, your water pump is failing. Replacing this is a labor-intensive job that involves removing the timing cover, so many owners choose to replace the timing chain and tensioners at the same time for peace of mind.
Transmission Care for Pursuit Vehicles
The 6F50 and 6F55 transmissions in these vehicles are rugged, but they take a beating. Police officers often shift from Drive to Reverse quickly or hold gears longer during pursuits. Regular fluid exchanges (not high-pressure flushes) are vital. Use only Mercon LV fluid to ensure the solenoids operate correctly.
If you notice a “harsh shift” from first to second gear, it may be a sign of a worn valve body or a need for a software update. Ford released several TSBs (Technical Service Bulletins) for the 2017 model year to address shift logic. Always ensure your PCM (Powertrain Control Module) is flashed with the latest firmware from a dealership or a high-end scan tool.
Common Mechanical Issues and Troubleshooting
Even the toughest 2017 ford explorer police car has its weak points. One of the most common complaints is a “clunking” sound from the front end when going over bumps. This is almost always related to the sway bar links or the lower control arm bushings. Because of the heavy-duty nature of the car, these parts take more abuse than civilian versions.
Another issue to watch for is “exhaust smell in the cabin.” This was a widely reported problem with the Explorer platform. In police units, the issue is often exacerbated by holes drilled in the rear liftgate or floor for equipment wiring. Ensure all grommets are sealed and check the rear air extractors behind the bumper for proper operation.
The AWD system can sometimes trigger a “Terrain Management Fault” or “AWD Off” message. This is frequently caused by a faulty wheel speed sensor or a heat-damaged wiring harness near the rear differential. Inspect the wiring for any signs of melting, especially if the vehicle was used in a high-heat environment like a desert patrol unit.
Cooling Fan Failures
The dual electric cooling fans are high-wear items. Because police cars spend so much time idling, these fans run almost constantly. If your temperature gauge starts to creep up while sitting at a stoplight, but drops once you start moving, one or both of your fans have likely failed. Always replace them as a pair to ensure balanced airflow.
When replacing fans, check the fan control module and the connector. The high current draw can sometimes melt the plastic connector housing. If you see any signs of browning or melted plastic on the wires, you must splice in a new pigtail connector. Failure to do so will result in the new fan motor burning out prematurely.
Drive Shaft and U-Joint Vibrations
If you feel a vibration at highway speeds (usually between 60 and 70 mph), don’t immediately assume it’s a wheel balance issue. The two-piece drive shafts on these interceptors are prone to center-bearing wear. Check the rubber hanger for cracks or excessive play. A failing U-joint on the rear section of the shaft can also cause a rhythmic “chirping” sound at low speeds.
Converting the 2017 Ford Explorer Police Car for Civilian Use
Buying a 2017 ford explorer police car from an auction usually leaves you with a “blank slate” interior. Most departments pull their center consoles, leaving a wide-open gap between the front seats. You can easily install a civilian Explorer console, but you may need to fabricate mounting brackets or buy the specific “police to civilian” adapter kits available online.
The rear doors on interceptors are often set to “prisoner mode,” meaning they cannot be opened from the inside. This is a simple fix. You need to remove the door panel and reconnect the handle linkage to the latch mechanism. While you are in there, check for ballistic door panels. Some units come with Level III armor plates, which add significant weight but offer incredible protection.
Plugging “roof holes” is another priority. Police cars have NMO mounts for antennas that leave 3/4-inch holes in the roof. Do not just use duct tape. Use proper rubber NMO hole plugs or have a body shop weld them shut and paint-match the roof. This prevents water intrusion that can ruin the headliner and cause electrical shorts in the overhead console.
Decommissioning the “Dark Mode”
Most police units are programmed for “Dark Mode” or “Silent Mode.” This means the interior lights do not turn on when you open the doors, which is great for tactical situations but annoying for grocery trips. You can change this setting using FORScan, a software tool that allows you to modify the vehicle’s “As-Built” data via the OBD-II port.
Using FORScan, you can also enable features that might have been disabled, such as the “Remote Start” (if the hardware is present) or the “Rear View Camera” if it was disconnected. This software is a must-have for any DIY owner of a 2017 ford explorer police car. It allows you to talk to the modules just like a Ford technician would at the dealership.
Upgrading the Audio System
The base audio system in a police interceptor is functional but underwhelming. It usually features a small 4-inch screen and basic speakers. Fortunately, the dashboard architecture is the same as the civilian Explorer. You can swap in an 8-inch Sync 3 system for Apple CarPlay and Android Auto compatibility, though it requires some wiring harness adapters and programming.
Performance Benchmarks and Driving Dynamics
Driving a 2017 ford explorer police car feels significantly different than a standard SUV. The steering is heavier and more communicative. The AWD system is tuned for a “rear-bias” feel during hard acceleration, helping the vehicle rotate through corners. It is remarkably agile for its size, which is why it became the dominant police vehicle in North America.
In terms of speed, the 3.7L V6 will do 0-60 mph in about 8 seconds, while the 3.5L EcoBoost drops that time to under 6 seconds. The top speed is electronically limited to 131 mph for the 3.7L and 148 mph for the EcoBoost. These limits are set based on the speed rating of the pursuit-rated tires that come standard from the factory.
If you plan on taking your interceptor off-road, you will benefit from the heavy-duty cooling and skid plates. However, keep in mind that the suspension is tuned for pavement. For serious trail work, you might want to look into a small lift kit and more aggressive all-terrain tires. The lack of a “Low Range” transfer case means you’ll rely on the traction control system to manage wheel spin in the mud.
Frequently Asked Questions About the 2017 Ford Explorer Police Car
Does the 2017 interceptor have a third-row seat?
Generally, no. Most 2017 police units were delivered from the factory without third-row seating to maximize cargo space for gear. While you can technically retro-fit a civilian third row, the mounting points are often missing or covered by heavy-duty floor plates. It is a major project that requires drilling and welding.
Can I use regular gas in the 3.7L engine?
Yes, the 3.7L V6 is designed to run on 87-octane regular unleaded. However, it is also Flex-Fuel capable, meaning you can run E85 ethanol. E85 provides a slight bump in horsepower but significantly reduces fuel economy. If you are chasing maximum performance, a high-quality 91-octane fuel can help the knock sensors advance the timing for better throttle response.
How do I know if my interceptor has a limited-slip differential?
The 2017 interceptor uses an “Open” differential combined with Brake-Based Traction Control. Instead of a mechanical locker, the computer applies the brakes to the spinning wheel to transfer torque to the wheel with grip. This system is very effective on snow and wet pavement but can cause brake wear if used aggressively in deep sand or mud.
Are the parts for the police car more expensive?
Some are, and some aren’t. Basic maintenance items like oil filters and spark plugs are the same as the civilian model. However, heavy-duty items like the alternator, brake rotors, and cooling fans are more expensive because they are built to a higher specification. Always cross-reference part numbers to ensure you are getting the “Interceptor” version of the part.
Final Thoughts for the Interceptor Owner
The 2017 ford explorer police car is a testament to Ford’s engineering prowess in the vocational vehicle market. It offers a level of durability that is hard to find in the civilian world. By staying on top of the PTU fluid changes, monitoring the water pump weep hole, and embracing the heavy-duty nature of the platform, you can enjoy a vehicle that is as tough as it looks.
Whether you are building a budget-friendly daily driver, a rugged camping rig, or a dedicated towing vehicle, the PIU is a fantastic choice. Just remember to treat it with the respect a high-performance machine deserves. Keep your fluids clean, your tires aired up, and your eyes on the gauges. Stay safe and enjoy the power of the interceptor!
- Smallest Chevrolet Car – Maximizing Utility And Efficiency - September 28, 2026
- Chevrolet Small Car Models – A Practical Owner’S Guide To Maintenance - September 28, 2026
- Chevrolet Hhr Miles Per Gallon – Real-World Efficiency And Maintenance - September 28, 2026