1991 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026
1991 · All trims · All engines
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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1991 Land Rover Defender has 6 documented known issues, with 3 rated critical. The most serious are 200Tdi cylinder head cracking in the bridge between the valves ($300-$1,500 repair), Bulkhead corrosion around footwells, vents and screen frame ($350-$3,500 repair) and Chassis rot at rear crossmember, outriggers and spring/axle mounts ($250-$6,000 repair). Across all issues with published estimates, repair costs range from $60 to $6,000. DIY maintenance guides at au7o.io.
ELECTRICAL SYSTEM:12V/24V/48V BATTERY
THE "HAZARDOUS SUBSTANCE LABEL" WARNING WAS NOT INSTALLED ON THE BATTERIES IN THESE VEHICLES.
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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1991 Land Rover Defender has 6 documented issues. The most frequently reported are: 200Tdi cylinder head cracking in the bridge between the valves, Bulkhead corrosion around footwells, vents and screen frame, Chassis rot at rear crossmember, outriggers and spring/axle mounts. Of these, 3 are rated critical and should be addressed promptly.
The 1991 Land Rover Defender has 6 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 3 issues are rated critical: 200Tdi cylinder head cracking in the bridge between the valves and Bulkhead corrosion around footwells, vents and screen frame and Chassis rot at rear crossmember, outriggers and spring/axle mounts. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Land Rover Defender issues range from $60 to $6,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, 200Tdi cylinder head cracking in the bridge between the valves, typically costs $300-$1,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
The 200Tdi cylinder head has a known design weakness: the casting 'bridge' between the valve seats is very thin, and on a high-mileage or once-overheated engine it cracks across that bridge. The cracks let combustion gases into the coolant (and coolant loss), and a cracked head i… Repairs typically run $300-$1,500. Severity: high.
The pressed-steel front bulkhead is the single most expensive structural weak point on a 200Tdi-era Defender and the one restorers fear most. The lower outer corners (footwell box sections), the heater/fresh-air vent apertures, the windscreen-frame mounting flange, and the door-p… Repairs typically run $350-$3,500. Severity: high.
The 200Tdi-era ladder chassis left the factory only painted, never galvanised, so the boxed steel rusts from the inside where mud and water collect and cannot drain. The rear crossmember rots first (it fills with road debris and is hidden behind the rear tub), followed by the bod… Repairs typically run $250-$6,000. Severity: high.
The front axle swivel ball housings (the chromed steel balls that carry the CV joints and steering) are a classic weep point on this era. The lower swivel seal lets EP90/swivel grease escape, leaving the tell-tale oily run down the swivel and starving the CV/bearings of lube. The… Repairs typically run $80-$500. Severity: medium.
The 200Tdi's cooling system is only just adequate, and on a restoration project it is usually tired. Years of neglected antifreeze let the radiator silt up and corrode internally, restricting flow; the viscous fan coupling has a high failure rate and stops pulling air at idle/low… Repairs typically run $150-$800. Severity: medium.
The 200Tdi runs a Bosch/CAV-type DPA rotary injection pump fed by a camshaft-driven mechanical lift pump, and both develop documented leaks/faults with age. The lift pump diaphragm hardens and tears (often from dirty fuel/debris) causing fuel starvation, hesitation and stalling —… Repairs typically run $60-$700. Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
