INEOS Grenadier Accessories: A Practical Build Guide

Build guide · INEOS Grenadier · Updated September 2026

The Grenadier was drawn around the idea that you would bolt things to it. The roof has mounting points waiting in it, the rear opens as two separate doors, there is a ladder on one of them and a spare wheel on the other. That is a head start most 4x4s do not give you — and it is also why a Grenadier build goes wrong in a specific way: people buy parts one at a time until nothing shares a mounting language. This guide runs zone by zone, with the numbers that decide whether a part goes on your car.

1. Start with your own car

Spend five minutes with the car before you spend anything else. Grenadier specifications move with market, model year, body style and options, so the figures that count are the ones printed for your vehicle rather than the ones in a forum thread.

What the handbook tells you

What to check on the car itself

These are the details that decide whether a specific part goes on your specific Grenadier. Checking now is cheaper than a return later.

2. The roof: the OX PRO platform and what bolts to it

The roof is the foundation, because nearly everything else up there attaches to it rather than to the car. It is also the one decision that is genuinely awkward to reverse, so it is worth taking time over.

What separates a good platform from a cheap one

Roof platforms for this car fall into two groups: universal bar sets adapted until they fit, and platforms cut for the Grenadier's own roof. They photograph the same and they do not behave the same. Five things are worth checking, whoever you buy from.

• Dynamic rating with the platform's own weight included. A 66 lb (30 kg) platform does not leave you the whole allowance, and a spec sheet that omits its own weight is hiding the subtraction.
• Added height. The most common regret, and it is almost always discovered in a parking structure rather than on a trail.
• How it meets the roof. The Grenadier gives you mounting points; the question is whether the brackets were cut for those points or adapted from a universal kit. Adapted feet concentrate load in fewer places, and that is where noise and movement start.
• The accessory language. A platform with no defined way to attach a light, a shovel or a table is a platform you will eventually drill.
• What happens to the cables. Lights and a compressor mean wiring. If there is nowhere for it to go, it ends up cable-tied to the outside of a bar, where branches find it.

That list is the specification we built the OX PRO platform against, and both lengths meet all five.

The OX PRO crossbars are ours, not off the shelf

The bars are a 3.5 × 1.0 in (90 × 25 mm) profile extruded from a die made for us, wider than a standard slat. Two details change how the platform lives with you. A channel runs the length of the profile and takes cabling for lights or a compressor, so nothing is strapped to the outside and nothing chafes. And the holes are drilled at fixed positions, so a mount bolts to a known point rather than to a T-nut you tighten and hope stays put. Anti-slip grooves along the top stop loads creeping when the car is working. On the 3/4 platform that is eight bars, 11.7 in (296 mm) apart, with 8.1 in (205 mm) of clear space between them.

3/4 or 1/1

Both platforms share the bar profile, the hole pattern and the load ratings, so accessories move between them and the decision is purely about the back of the roof. The 3/4 stops short and leaves the rear section clear — useful if you want the ladder approach open, a shower or a panel back there, or simply less weight behind the rear axle. The 1/1 runs the full length and adds a fairing with a removable cover, so a light bar can go in later without cutting anything; it is sized for the Siberia XP SR LED Bar 50″.

The OX PRO System keeps growing

The bar profile matters because of what comes after it. The platform is not a finished purchase — it is the mounting language for everything you add later, and the same pattern runs across the range. A build that starts as bare slats and a box ends up three seasons on carrying lights, boards, an awning and a kitchen, without a new hole in the car.

• 3/4 OX PRO Roof RackRear roof section left clear. 76.8 × 59.4 in (1950 × 1510 mm), 64 lbs (29 kg).
• 1/1 OX PRO Roof RackFull-length platform with a fairing cut for a 50″ light bar.
• OX PRO Roof Rack Panels — 2 pcsOr the single panel if you only need to close off one area.
• Roof Rack Tie Down PointsTwo anchor points you can move to where the load actually sits.
• Roof Rack Grab HandleThe part you are grateful for at five in the morning.
• Awning Mount — Quick ReleaseSize is decided by your awning, not by the car.
• Recovery Boards Side MountBoards on the side of the platform, bed left free.

3. Body sides, fenders and getting up there

The Grenadier's flanks are flat, tall and unusually willing. Two things live here: attachment surface, and the means to reach the roof you have just built.

The body sides

The External MOLLE Panel turns the side of the car into a full-height attachment field, and it works two ways: on the side of an OX PRO platform, or directly on the body using a threaded airline stud and an M8 × 20 mm stainless bolt. Both left and right panels take up to 55 lbs (25 kg) dynamic, which covers a shovel, a canister or a recovery kit rather than a toolbox. If you are mounting to the body, the studs are a separate, cheap part and worth having spares of.

Fender Plates are the other body-side item, and they are the one piece here that is not about carrying anything: aluminum plates above the wheel arches, fixed with reinforced double-sided tape or through six cutouts per plate. They are listed for both the Grenadier and the Quartermaster.

For smaller items — a cable, an umbrella, a shovel handle — FitRub rubber mounts bolt into the M5 rivet-nut holes that run through the MOLLE panels, the Roof Shelf and the baskets. Same fastener everywhere, which is the point.

Getting up there

A loaded roof is only useful if you can reach it. Most Grenadiers that go off-road are running rock sliders, and a slider is a protection part, not a step — the tube is the wrong shape to stand on in wet boots. The Steps bolt onto the sliders you already have, in stainless steel, using bolts rather than modification, and they come as a pair with brackets, inner supports and fasteners. The set also includes the 4 mm Allen key and threadlocker, so you are not hunting for tools halfway through.

• Steps for RockslidersStainless, sold as a pair, bolts to the factory sliders.
• Fender PlatesGrenadier and Quartermaster. Tape or six cutouts per plate.
• L-Track Stud 8 × 20 mmM8 stainless stud for body-side panel mounting.
• FitRubRubber mount for a shovel, a cable or an axe. Goes into any M5 rivet nut in the system.

4. The rear: two doors, a ladder and the spare wheel

This is where the Grenadier differs most from anything else we build for. Instead of one tailgate you have a large door and a small one, a ladder on the side of them and a spare wheel hanging off the back. Four surfaces, four different jobs — and the place where owners most often buy hardware they do not end up using.

The large door

The large door is the obvious work surface, and a drop-down table is how you keep one permanently on the car without it taking up load space. Closed, it is a MOLLE panel — rope, radio, first aid kit, axe. Open, it is a stainless steel worktop that shrugs off weather and tomato juice, and pulling the cord on the right extends a hidden plywood board that takes the whole surface out to 54 in (137 cm). Locking pins hold it where you put it, and the board slides out completely for cleaning.

Above and beside the table, the Large Door MOLLE Panel uses the rest of the door: steel, weather-resistant coating, existing mounting points, no drilling. It is the place for recovery gear and tools that are too heavy to live on a body-side panel.

The small door

The small door is narrow and gets overlooked, which is exactly why it is useful — nothing competes for it. The Small Door MOLLE Panel is sized for that strip and is right for a first aid kit, a flashlight, gloves, a compact pouch. It will not carry a jerry can, and it is not meant to.

The ladder

The ladder is a mounting surface most people never think of. A MOLLE panel there carries up to 55 lbs (25 kg) and puts gear at the one spot you pass every time you open the back — sensible for things you want on the way up to the roof, less sensible for anything you need while driving. It fits without drilling and comes off the same way.

The spare wheel

The spare is dead weight until you make it carry something. The Universal Wheel Mount is the base for all of it: stainless steel, strapped to the wheel with no drilling, sized for wheels 28–37 in (71–94 cm) in diameter and 8.5 in (21.5 cm) or wider, and it takes up to three items in whatever arrangement suits you. Everything below bolts onto it.

• Drop-Down Tailgate TableStainless worktop, extends to 54 in (137 cm), carries 44 lbs (20 kg).
• Large Door MOLLE PanelThe rest of the large door, for tools and recovery gear.
• Small Door MOLLE PanelThe narrow door, for the small things you always lose.
• Universal Wheel MountThe base for everything on the spare. Up to three items.
• Spare Wheel TrayA flat surface on the wheel for boxes and loose kit.
• Traction Boards BracketBoards on the spare, out of the load bay.
• Propane Tank Holder — 5 lb, 10 lbGas off the floor and outside the cabin.
• Stainless Steel Strap for Universal Wheel MountThe part that holds it all to the wheel.
• Tap for RotoPaxWater on tap at the back of the car, no pouring.

5. Inside: the cabin and the load bay

The Grenadier's load bay is tall, square and easy to fill badly. It works in three layers, and they are worth building in order: the shelf overhead, the window line along the sides, the floor. Each one uses space the others cannot.

The Roof Shelf is a platform, not a shelf

It looks like a simple part and it is not. The Roof Shelf is one piece of steel — no joints to flex under load — 47.2 × 20.1 in (1200 × 510 mm), 22 lbs (10 kg), rated 66 lbs (30 kg) static and 26 lbs (12 kg) dynamic. It carries MOLLE on its face and M5 rivet nuts through it, and it is the mounting base for the barrier, the chair compartment, the net and the baskets.

Installation uses the factory blanking plugs in the headliner, and you get two ways to do it. Remove a plug, drill it, put it back and screw the shelf through it — the interior still looks standard. Or take the plugs out entirely and mount straight into the factory openings, with the plugs kept in a drawer for the day you sell the car. Either way it is reversible and the car keeps its holes.

The 6.3 in (160 mm) gap the shelf leaves under the headliner is a single mounting slot, and only one thing lives in it at a time: a net, a chair compartment, or nothing. Swapping takes seconds and no tools.

Along the window line

The strip between the window and the wheel arch is the volume nothing stacks into, and the Internal MOLLE Panel is what claims it. Each panel is 29.5 × 13.8 in (750 × 350 mm), weighs 8.2 lbs (3.7 kg) and carries 33 lbs (15 kg) dynamic. What makes ours different is the central opening: it lets you use the space between the panel and the glass, which is where a rain jacket, a beanie or a roll of paper towels can live without taking any usable volume at all.

They come as Left and Right, and both are cut to fit every version of the Grenadier — with glass in the load bay and without it.

At floor level

Cargo Baskets take the sides of the load bay at floor height: aluminum, powder coated, 27.2 × 7.9 in (690 × 200 mm), rated 22 lbs (10 kg) each, mounted to factory points with no drilling and MOLLE across the face. The right-hand basket is a single part. The left comes in two versions, and this is the fitment detail to get right — Left INVERTER if your car has the inverter on that side, Left STANDARD if it does not.

For a fridge, the Tilted Fridge Slider runs it out of the load bay and tilts it down, with gas struts taking the weight so a full fridge lifts back with one hand rather than two and a grunt. It carries up to 176 lbs (80 kg).

Measure the base of your fridge against the drawer figures, not the outer ones. The Large is sized around a Dometic CFX50, the Medium around a CFX35.

Up front

The Grenadier's dashboard is deliberately bare, which looks right and helps not at all when you want a phone and a GPS within reach. The Dash Mounting Platform is a steel plate that bolts to the dash and gives a RAM-type ball mount something solid to live on, instead of an adhesive pad that lets go in summer heat. The ball mount itself is not included, because most people already own the one they like.

• Roof ShelfOne piece of steel, 66 lbs (30 kg) static. Everything else inside hangs off it.
• Movable Cargo BarrierFolds up when you do not need it. Requires the Roof Shelf.
• Under The Shelf CompartmentYour chair, overhead, out of the way.
• Universal Under Shelf NetFor the light and bulky things that have nowhere else to go.
• Internal MOLLE PanelLeft and right. Fits the versions with rear glass and without.
• Cargo BasketRight, Left INVERTER or Left STANDARD — check your left side first.
• Tilted Fridge Slider with Gas StrutsFridge out and tilted down, 176 lbs (80 kg) capacity.

6. Lighting

Lighting on a Grenadier splits three ways, and buying one type for all three jobs is how people end up with a bright car they cannot work beside. Distance light goes forward, on the platform's front edge or in the 1/1 fairing. Work and scene light goes sideways and down, around camp. And amber is worth having when there is dust or fog in the air, because white light comes straight back at you.

Whatever you fit, the crossbar cable channel means the wiring runs inside the platform rather than along it.

• Siberia XP SR LED Bar 50″Sized for the fairing on the 1/1 OX PRO platform.
• Nuuk D-Line QB Driving Light 3″Compact forward light where a full bar is too much.
• Nuuk D-Line QB Work Light 39WCamp and work light, pointed where you are actually standing.
• Dark Knight Fortex Work Light 38W AmberAmber, for dust and fog.
• Unity Rock Light WhiteUnder the body, for the wheel you cannot see.

7. Three builds by trip type

Three ways a Grenadier actually gets used. Take whichever is closest to your trips and adjust from there.

Weekend setup — two people, two nights

Nothing up top unless a tent is already in the plan. Inside, the Roof Shelf goes in first and carries the soft bags overhead. One Internal MOLLE Panel on the side you reach from, the Under The Shelf Compartment for a chair, and the Drop-Down Tailgate Table for coffee and cooking. Steps if the car has sliders. That is a weekend handled, and none of it is wasted if the build grows.

Long expedition — two weeks or more, off-grid

Everything from the weekend setup, plus the parts that only earn their place over distance. The OX PRO platform goes on — 3/4 if you want the rear of the roof clear, 1/1 if the tent and the gear both need room. Recovery Boards Side Mount and an Awning Mount up there, tie-down points where the load sits. At the back, the Universal Wheel Mount with a tray and the propane holder, and the Traction Boards Bracket taking the boards off the roof entirely. Inside, the Tilted Fridge Slider at floor level, both Internal MOLLE Panels, both Cargo Baskets, and the Under Shelf Net for the bulky soft kit. Forward lighting last, once you know where you want it aimed.

Family rig — kids, a dog, and everything at the bottom

The Movable Cargo Barrier is the part that changes this build, and it is the reason the Roof Shelf goes in first. Barrier up, dog and load behind it, passengers in front. Cargo Baskets down the sides for the things that get asked for from the back seat. Internal MOLLE Panels for jackets and small kit in the window-line space. The Drop-Down Tailgate Table becomes the place everyone eats standing up. A platform only if a tent or a box is genuinely coming along — otherwise keep the height and keep the fuel.

8. The order we would build in

If the roof is in the plan, start with the roof

Fit the platform before anything else goes up there, because everything on the roof either bolts to it or has to come off while it is installed. Platform, then the accessories that live on it — panels, tie-downs, awning mount, boards. Then the steps, because a loaded roof needs reaching. Then the interior, then the rear doors and the spare wheel, once you know what actually travels with you.

If you are not going up on the roof, work from the inside out

Start with the Roof Shelf, because the barrier, the compartment and the net all mount to it and retrofitting it around a full load bay is the same bad afternoon as retrofitting a platform. Then the window-line panels, then the baskets at floor level, then the fridge slider if a fridge is coming. The rear doors come next — table first, panels after, because the table tells you how much door is left. The spare wheel is last, because until you have packed the car twice you do not know what needs to go outside.

Whichever order you take, none of it changes the car. The OX PRO platform bolts to the mounting points already built into the Grenadier's roof. The Roof Shelf goes into the factory blanking plugs in the headliner, and they go back in if you ever take it out. The baskets and the panels use factory points, the steps use the sliders the car already has, the wheel mount straps to the spare. Nothing is drilled, and every part of it is designed and manufactured in Poland.

9. Common questions

3/4 or 1/1 — which platform should I take?

They share the bar profile, the hole pattern and both load ratings, so accessories move between them and neither locks you in. Take the 3/4 if you want the rear of the roof clear for a ladder approach, a shower or a panel. Take the 1/1 if you want maximum surface, or if a light bar in the fairing is part of the plan.

Do the Internal MOLLE Panels fit a Grenadier without rear side windows?

Yes. They are cut to fit both — the versions with glass in the load bay and the versions without.

Which left Cargo Basket do I need?

Open the left side of your load bay and look for the inverter. If it is there, you need the Left INVERTER version; if it is not, the Left STANDARD. The right-hand basket is the same part in both cases.

Does any of this need drilling?

No. The platform bolts to the roof mounting points, the interior uses factory points, and the Roof Shelf uses the factory blanking plugs — either screwed through a plug or straight into the opening with the plug kept aside. All of it comes off again.

How much height does the platform add?

Roughly 2.8–3.1 in (7–8 cm), both lengths. Measure what the car stands at today and add it before you trust a parking structure you use regularly.

Do Grenadier parts fit the Quartermaster?

Some do. The Fender Plates are listed for both. Anything referenced to the roof length or the load bay is cut for a specific body, so check the fitment note on the individual product page rather than assuming it carries over.

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