Ford Ranger Underbody Protection: Bash Plates, Materials and What to Protect

Bull bar. Canopy. Suspension. All terrain tyres. Recovery gear.

But underneath the Ranger are the components that can stop the trip completely if they take the wrong hit: the radiator area, engine sump, transmission and transfer case. A factory guard may handle stones and everyday road debris. The question is whether it is enough when the Ranger starts dropping into ruts, crossing rocky creek beds or travelling remote tracks where underbody damage is much harder to deal with.

For a canopy equipped touring Ranger especially, weight should be part of the buying decision, not an afterthought. Current Ranger examples show why: Brown Davis lists its four piece 3 mm aluminised steel Next Gen system at 40 kg, ARB’s new crosslinked polymer Under Vehicle Armour sits at approximately 22 kg and RIVAL’s five piece 6 mm aluminium package weighs 31.9 kg. They are not directly equivalent systems, but they show how material choice materially affects accessory weight.

Quick answer: does a Ford Ranger need aftermarket bash plates?

Not every Ranger needs a complete aftermarket underbody protection system.

For mostly sealed roads, maintained gravel, camping grounds and mild forestry tracks, the factory protection may be adequate depending on the variant.

Aftermarket protection becomes more worthwhile for rocky tracks, deep wheel ruts, remote touring, creek crossings with hidden obstacles, steep tracks where the vehicle regularly bottoms out, work vehicles on rough sites and Rangers running heavier touring builds where a damaged sump or transfer case could strand the vehicle remotely.

ARB describes its underbody protection as shielding vulnerable components such as the steering, sump, transmission and transfer case from rocks, stumps and other off road hazards.

You do not need to armour everything underneath the Ranger. Protect the components most likely to end the trip first.

What actually needs protecting under a Ranger?

1. Radiator and front underside (priority: high)

First in the firing line when approaching rocks, logs, steep banks and washouts. Damage to the cooling system can quickly make the vehicle undriveable. RIVAL includes dedicated radiator protection in its current five piece Next Gen package.

2. Engine sump (priority: very high)

Probably the easiest risk to understand. A hard strike can crack or puncture the sump, causing oil loss. Without oil, the engine does not last long. If someone only upgrades one section, sump protection belongs near the top of the list. ARB, Brown Davis, RIVAL and MCC all include engine and sump coverage in their Ranger systems.

3. Transmission (priority: high)

Once the front of the vehicle clears an obstacle, the transmission area is the next low point passing over it. Current Ranger systems from Brown Davis, ARB, RIVAL and MCC all provide dedicated transmission coverage.

4. Transfer case (priority: high for 4WD use)

The transfer case distributes drive through the four wheel drive system. Damage here can disable 4WD capability entirely. Brown Davis includes transfer case protection in its four piece Next Gen kit and ARB and RIVAL also cover this area.

5. Fuel tank (priority: moderate to high)

Not every package covers the fuel tank. RIVAL currently offers separate 6 mm aluminium fuel tank protection for the Next Gen Ranger, allowing buyers to extend coverage rearward if their terrain warrants it. More relevant for rock crawling, outback touring and remote station tracks.

6. Lower control arms (priority: specialised)

Suspension arms remain exposed even after the main drivetrain is protected. RIVAL currently offers dedicated 6 mm aluminium lower control arm guards for both PX generation and Next Gen Rangers. More relevant for hard off road use than normal touring.

7. DPF and exhaust components (priority: model specific)

Some diesel Ranger setups need extra consideration around the exhaust and DPF. ARB sells a specific 3 mm steel DPF and exhaust protection kit for applicable Rangers and says it is required when fitting one of its UVP systems to DPF equipped vehicles. This is why you must buy for your exact Ranger generation, engine, drivetrain and exhaust configuration.

Factory protection vs aftermarket bash plates

Start by inspecting what you already have

Different Ranger variants have different factory protection. The current Raptor comes with 2.3 mm steel underbody protection as standard. Ford also describes the Ranger Super Duty as having steel underbody protection. The Tremor gets underbody protection as part of its off road package.

That does not automatically mean there is nothing to upgrade. Ask which components are actually covered, how thick each section is, whether protection continues behind the sump, whether the transfer case is exposed, whether there is fuel tank coverage and whether the factory plate is already damaged. For how Super Duty specs differ from the standard Ranger, see our Ford Ranger Super Duty accessories guide.

Factory protection may be enough for some owners

For occasional gravel road travel, replacing every factory guard adds cost and payload consumption without much practical benefit.

Aftermarket protection adds coverage and design

The real advantage of a complete aftermarket system is often coverage depth and mounting design, not simply plate thickness. For example, ARB’s steel UVP uses multiple pressed and folded 3 mm steel panels, recessed fasteners and vehicle specific mounting to protect the engine, transmission and transfer case. Brown Davis uses laser cut 3 mm aluminised steel welded to Australian Standard AS 1554.

Steel bash plates

Steel remains the most common material in Australian Ranger underbody systems.

Current examples: ARB uses 3 mm steel (zinc plated and powder coated). Brown Davis uses 3 mm aluminised steel (40 kg for the four piece Next Gen kit). MCC uses 3 mm steel. Ironman uses 4 mm steel for its PX era system.

Advantages: Strong for its thickness. Good resistance to hard, concentrated rock impacts. Wide range of Ranger specific fitment options. Relatively easy for workshops to repair or reshape. Suitable for serious rock and remote track use.

Disadvantages: Heavier than alternatives (complete systems typically 40 to 44 kg). Protective coating needs maintenance if scratched. Exposed steel requires corrosion management. Large systems consume meaningful payload on a Ranger already carrying a canopy and touring gear.

Best for: Serious off road touring, work vehicles, rocky tracks and buyers who prioritise impact protection over weight.

Aluminium bash plates

Aluminium systems typically compensate for lower material stiffness by using thicker plate and formed reinforcement.

Current examples: RIVAL uses 6 mm deep stamped aluminium alloy. Offroad Animal uses 4 mm structural aluminium designed to integrate with its bull bars.

RIVAL’s five piece Next Gen package covers the radiator, engine, transmission, transfer case and lower control arms at 31.9 kg total. No drilling required for installation.

Advantages: Lower weight for comparable coverage (RIVAL at 31.9 kg vs Brown Davis steel at 40 kg for overlapping protection areas). Does not rust like bare carbon steel. Useful where Ranger payload is already under pressure. Formed aluminium designs with deep stamping and ribs provide substantial rigidity.

Disadvantages: Generally thicker material required. Can gouge or deform under very heavy rock impacts. Repairs may be less straightforward than bending a steel plate. Can be more expensive.

Best for: Touring Rangers, canopy equipped builds, owners watching payload, beach and coastal builds and moderate to serious off road use where weight matters.

ARB Under Vehicle Armour (polymer)

ARB now offers a crosslinked polymer option alongside its traditional steel UVP. The Under Vehicle Armour (UVA) for the Next Gen Ranger weighs approximately 22 kg fitted, which ARB says provides weight savings of roughly 22 kg compared to aftermarket steel alternatives. It is made from impact resistant crosslinked polymer, compatible with the factory bumper, ARB bull bars and ARB forged recovery points.

Advantages: Significantly lighter than steel or aluminium. Does not rust or corrode. Impact resistant polymer construction. Vehicle specific design.

Disadvantages: Newer product with less field history than steel systems. Polymer performance under extreme sustained rock abuse is different from metal. Not as widely available as steel systems across multiple brands.

Best for: Weight conscious touring builds. Owners who want meaningful protection without the 40+ kg payload penalty of steel. Rangers already carrying heavy canopy and touring fitouts.

UHMWPE (ultra high molecular weight polyethylene)

UHMWPE has legitimate engineering advantages. It offers strong sliding properties, high wear resistance, high impact strength and good chemical resistance. It can slide across obstacles rather than dig in, resist abrasion and avoid conventional metal rust.

However, in the mainstream Australian Ford Ranger market, steel and aluminium currently dominate the readily available vehicle specific systems from brands like ARB, Brown Davis, Ironman, MCC and RIVAL. UHMWPE Ranger protection is far more niche and custom at present.

UHMWPE also needs careful engineering around material thickness, mounting point spread, deformation under sustained load and proximity to hot exhaust components. Published continuous in air service temperatures for standard UHMW material sit around 82°C, which matters near hot drivetrain or exhaust components.

Best for: Specialised custom builds where a properly engineered system exists. Not recommended as a DIY cut and bolt solution using generic sheet material.

Material comparison

Property	Steel (3 to 4 mm)	Aluminium (4 to 6 mm)	Polymer (ARB UVA)	UHMWPE
Typical system weight	40 to 44 kg	30 to 32 kg	~22 kg	Varies
Rock impact resistance	Excellent	Very good (with forming)	Good	Good (sliding)
Corrosion	Coating needs maintenance	No conventional rust	No rust	No rust
Repair	Reshape in workshop	More complex	Replace panel	Replace panel
Ranger availability	Wide (ARB, Brown Davis, MCC, Ironman)	Growing (RIVAL, Offroad Animal)	ARB only (Next Gen)	Niche and custom
Best for	Hard off road and work	Touring and weight conscious	Maximum weight saving	Specialised custom

Thickness alone cannot compare two systems. Material grade, bends, ribs, mounting points, unsupported span and overall design matter just as much. RIVAL uses deep stamping and reinforcing geometry in its 6 mm aluminium, while ARB uses pressed and folded construction in its 3 mm steel.

Brand comparison

ARB

Steel UVP: 3 mm pressed and folded steel with laser cutting, zinc plating, powder coating, recessed bolts and removable panels. Three year warranty. Ford Licensed Accessory option through Ford dealers. Currently listed around $1,320 plus approximately $160 fitting.

Polymer UVA: Crosslinked polymer, approximately 22 kg fitted, compatible with factory bumper, ARB bull bars and ARB recovery points. For how ARB accessories integrate into a broader Ranger build, see our Ford Ranger bull bar buyer’s guide comparing ARB vs TJM vs Ironman vs Offroad Animal.

Brown Davis

Four piece 3 mm aluminised steel system covering front, sump, transmission and transfer case. 40 kg. Welded to AS 1554. Laser cut. Recessed bolt locations. Service removable panels. Front venting. Powder coated finish. Currently listed around $610. DIY friendly bolt on installation. Over 40 years of Australian off road experience.

Best for: Strong traditional steel protection at a competitive price point. Touring and remote work use.

RIVAL 4×4

Five piece 6 mm deep stamped aluminium package covering radiator, engine, transmission, transfer case and lower control arms. 31.9 kg. No drilling required (factory mounting points). Currently listed around $1,485. Individual sections available so owners can build protection progressively.

Best for: Weight conscious touring builds. Rangers already carrying canopy and camping gear. Buyers wanting broad aluminium coverage.

Ironman 4×4

PX/PX3 era Ranger option in 4 mm steel. Currently listed around $875. Covers engine and transmission. Shaped to retain ground clearance.

Best for: PX, PX2 and PX3 owners wanting thicker steel construction.

MCC 4×4

Next Gen Ranger three piece system in 3 mm steel covering steering, sump and transmission. Currently listed around $699.

Best for: Simpler front to transmission protection at a mid range price.

Offroad Animal

Next Gen Ranger lower plate in 4 mm structural aluminium. Specifically designed to work with Offroad Animal Toro and Predator bull bars. Not a standalone universal plate.

Best for: Owners already building around the Offroad Animal bull bar system.

How much protection do you actually need?

Level 1: gravel and mild touring

Prioritise engine and sump protection. Possibly a front plate. Retain remaining factory guards. This covers the most common risk without adding significant weight.

Level 2: regular off road touring

Protect the radiator and front underside, sump, transmission and transfer case. This is where the Brown Davis, ARB or RIVAL multi panel approach starts making sense. For how underbody protection fits into a broader touring build with budget breakdowns, see our Ford Ranger touring build guide.

Level 3: remote and technical terrain

Consider adding fuel tank protection, lower control arm guards, exhaust and DPF protection where applicable and any other model specific exposed components. The aim should be protecting the actual vulnerable areas, not simply covering every visible surface with metal.

Weight matters more on a canopy equipped Ranger

Consider a Ranger already carrying an 80 kg canopy, 70 kg drawers, 50 kg fridge and slide, 60 kg bull bar, roof rack, passengers, tools and water. Then add another 30 to 44 kg of underbody armour.

Underbody protection sits low, which is good for centre of gravity. But it still counts against the Ranger’s payload. Owners should include bash plates in their accessory weight spreadsheet, GVM calculation, touring load calculation and towing setup.

On a Wildtrak with 985 kg payload, the difference between a 22 kg polymer system and a 44 kg steel system is 22 kg of payload saved. That is 22 L of water or a lighter drawer configuration or more cargo capacity. For how every accessory stacks up against your Ranger’s limits, see our Ford Ranger payload and GVM guide.

What we recommend at Oz Canopies & 4×4

For owners building a touring Ranger setup with a canopy, drawers, fridge and roof gear already consuming several hundred kilograms of payload, give serious consideration to the lighter underbody options. A 22 kg polymer system or 32 kg aluminium system protecting the same critical components as a 44 kg steel system gives you meaningful protection with less weight penalty.

Does a bash plate reduce ground clearance?

A well designed plate should hug the underside rather than hanging unnecessarily low. ARB says its UVP is designed to fit closely to the underside and minimise impact on ground clearance. Brown Davis says its design aims to maximise approach and departure angles.

Check the lowest point before installation and after. Confirm bolt head positions. Check whether panels hang below crossmembers. A badly designed plate can become the first thing that hits the obstacle it was supposed to protect against.

Bull bar compatibility matters

Some protection begins at the bull bar and continues beneath the engine. Ask whether the front plate fits the factory bumper, whether it fits your specific bull bar brand (ARB, TJM, Ironman, Offroad Animal), whether an adapter is needed, whether the bull bar already includes front protection and whether the factory plate can stay.

Offroad Animal’s current Ranger lower plate is a clear example: it specifically requires its own Toro or Predator bar. It is not a universal plate.

Service access: the feature buyers forget

A strong bash plate becomes annoying quickly if every oil change requires removing half the underside. Look for oil drain access, filter access, removable individual panels, recessed fasteners, easy to source replacement bolts, drainage holes and ventilation openings.

Brown Davis designs its panels for easy removal during servicing. ARB uses removable panels and recessed bolts. RIVAL incorporates ventilation into its design. This should be part of the buying comparison, not something discovered at the first service.

Common bash plate mistakes

• Buying the thickest plate without considering material or design quality
• Protecting the sump but leaving the transfer case completely exposed
• Assuming every Ranger variant has the same factory protection
• Ordering PX plates for a Next Gen Ranger (different platforms)
• Assuming Raptor protection fits a standard Ranger
• Ignoring bull bar compatibility
• Forgetting diff drop or suspension compatibility
• Adding 40 kg of steel without including it in payload calculations
• Choosing a plate with poor service access (every oil change becomes a drama)
• Covering drainage and ventilation unnecessarily
• Never cleaning packed mud from above the plates
• Treating generic UHMWPE sheet as an easy DIY substitute for an engineered system

Buying checklist

Before ordering:

• What Ranger generation do I have (PX, Next Gen, Raptor, Super Duty)?
• What exact variant and engine?
• What factory protection is already fitted?
• Which components remain exposed?
• What terrain do I realistically drive?
• Steel, aluminium or polymer?
• How much does the complete kit weigh?
• What components does it protect?
• Does it fit my bull bar?
• Does it fit my recovery points?
• Is it compatible with my suspension or diff drop?
• Does it retain ground clearance?
• Are mounting bolts recessed?
• Can individual panels be removed for servicing?
• Are drain and ventilation openings provided?
• Can replacement panels be purchased individually?
• What warranty applies?
• Is professional fitting recommended?

Frequently asked questions

Does a Ford Ranger need bash plates? For sealed roads and maintained gravel, factory protection is usually adequate. For rocky tracks, remote touring, creek crossings and technical terrain, aftermarket protection for the sump, transmission and transfer case becomes worthwhile.

What do Ranger bash plates protect? Common systems cover the radiator and front area, engine sump, transmission and transfer case. Some systems extend to the fuel tank and lower control arms.

Are Ford Ranger factory bash plates strong enough? Depends on the variant and terrain. The Raptor has 2.3 mm steel factory protection. Other variants may have lighter guards. For harder off road use, aftermarket systems typically offer broader coverage and stronger construction.

Is steel or aluminium better for bash plates? Steel (3 to 4 mm) offers maximum rock impact resistance at higher weight (40 to 44 kg for a full system). Aluminium (4 to 6 mm) offers very good protection at lower weight (around 32 kg). Polymer is lightest (around 22 kg). Choose based on terrain severity and how much payload you can spare.

How much do Ranger bash plates weigh? Complete system examples: ARB polymer UVA approximately 22 kg, RIVAL aluminium 31.9 kg, Brown Davis steel 40 kg, ARB steel approximately 44 kg. Individual plates weigh less.

Do bash plates reduce ground clearance? Well designed plates hug the underside and minimise clearance loss. Check the lowest point before and after installation. Poorly designed plates can become the first point of contact with obstacles.

Do I need to remove bash plates for servicing? Quality systems include oil drain access and removable panels. Check before buying. A system that requires complete removal for every service is impractical.

Does Ranger Raptor already have underbody protection? Yes. Ford lists 2.3 mm steel underbody protection as standard on the current Raptor. Whether it covers enough for your terrain depends on where you drive.

Can I fit bash plates with an aftermarket bull bar? Usually yes, but compatibility must be confirmed. Some plates are designed for specific bull bars. Offroad Animal’s lower plate requires its own Toro or Predator bar.

Do bash plates affect Ranger payload? Yes. A complete system adds 22 to 44 kg depending on material. That weight counts against payload and should be included in your overall accessory weight calculation. For how suspension upgrades and GVM changes interact with payload, see our Ford Ranger suspension and GVM upgrade guide.

Should I protect the Ranger fuel tank? For rock crawling, outback touring and rough station tracks, fuel tank protection is worth considering. For normal touring and gravel roads, it is usually less critical than sump and transmission protection.

What is UHMWPE underbody protection? Ultra high molecular weight polyethylene. Good sliding, abrasion and impact properties. Currently niche in the Australian Ranger market compared to steel and aluminium. Only recommended where a properly engineered Ranger specific system exists.

Next step: protect what matters most first

Building a Ranger for rougher tracks? Start with the components most likely to leave you stranded: the sump, transmission, transfer case and vulnerable front underside. Then decide whether the extra coverage justifies the cost and weight. A well designed aluminium or polymer system protecting the right components is far more useful than simply fitting the thickest bash plate you can find. For how recovery gear complements underbody protection on remote trips, see our Ford Ranger recovery gear guide on what to carry before you get stuck.

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