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UK Reliability Directory

INEOS Grenadier Quartermaster

Production Years: 2023 - 20264 Documented Faults

The INEOS Grenadier Quartermaster is a full-size double-cab pick-up truck developed to combine the extreme off-road capability of the Grenadier platform with the load-hauling practicality of an open cargo bed. Unveiled at the Goodwood Festival of Speed in July 2023 with UK deliveries commencing in 2024, the Quartermaster extends the box-section ladder-frame chassis by 305mm to a 3,227mm wheelbase, resulting in an overall vehicle length of 5,440mm. The rear load bed measures 1,564mm long by 1,619mm wide, comfortably accommodating a standard 1,200mm x 800mm Euro pallet between the wheel arches, with a sturdy drop-down tailgate engineered to support up to 225kg when open. Powered by the same BMW 3.0-litre turbocharged straight-six petrol (B58) and diesel (B57) engines paired with the ZF eight-speed automatic and permanent Tremec four-wheel-drive system, the Quartermaster retains heavy-duty Carraro solid beam axles, five-link coil suspension, and an uncompromised 3,500kg towing capacity. However, with payload ratings sitting between 760kg and 835kg depending on specification, the Quartermaster falls below the UK HM Revenue and Customs 1,000kg payload threshold required for standard light commercial vehicle VAT reclamation and flat-rate company car tax, making it primarily a specialist lifestyle workhorse or heavy-duty agricultural machine.

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Common Faults & Reliability

These are the most common documented problems for the INEOS Grenadier Quartermaster, sorted by their typical impact and frequency.

Extended rear overhang towbar grounding and bumper bracket damage

medium severity

The Quartermaster's 305mm wheelbase stretch and substantial 545mm rear body extension reduce its off-road departure angle from 36.1 degrees (on the Station Wagon) down to 22.6 degrees. When descending steep quarry drop-offs, navigating deep drainage gullies, or reversing over high kerbs, the heavy-duty towbar framework, chassis rear crossmember, and bumper corners frequently ground out. Severe impacts can bend the rear bumper mounting brackets, distort the drop-plate hitch, or crush the 13-pin trailer electrical socket.

Est. repair cost:£300–£850

Tailgate hinge pivot strain and load bed perimeter seal weeping

low severity

The Quartermaster features a heavy-duty drop-down tailgate engineered to withstand a 225kg static load. However, repeated heavy loading—such as rolling heavy plant machinery, timber balks, or fully laden Euro pallets over the tailgate—places tremendous shear stress on the two lower hinge pivot pins and braided steel support cables. Over time, the tailgate can sag out of alignment. Furthermore, when fitted with an aftermarket or optional tonneau cover, water frequently seeps past the bed front bulkhead seals during heavy UK downpours.

Est. repair cost:£150–£450

High turning circle manoeuvring strain and steering wander

medium severity

With its extended 3,227mm wheelbase, early Quartermaster pickups (2023–2024) suffer from an enormous 14.5-metre turning circle. Navigating tight UK petrol forecourts, mini-roundabouts, or multi-storey car parks requires intense hand-over-hand wheel cranking. Combined with the recirculating-ball steering box's reluctance to self-centre, drivers experience significant arm fatigue on winding rural roads. In 2025, INEOS fitted revised steering bump-stops and a variable-ratio Bosch steering box that reduced the turning circle to 13.8 metres and improved self-centring.

Est. repair cost:£350–£1,100
View All 4 Documented Issues

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