Troopy 3rd Door Conversion: What You Need to Know
The factory 78 Troopy has only two front doors and a pair of rear barn doors. Accessing the second row means either climbing past the front seats or entering through the cargo barn doors and over the seats. For families and tourers using the second row daily, this becomes a real frustration. The aftermarket 3rd door conversion adds a proper side-opening rear-passenger door, transforming the Troopy into a more practical day-to-day family vehicle.
This guide covers what is involved in the conversion, supplier options, cost and the engineering pathway.
1. What the Conversion Involves
A 3rd door conversion cuts an opening in the passenger-side rear body panel and installs a hinged door, lock mechanism, seal, glass and trim. Body strength is preserved by adding internal reinforcement during the cut. The door typically uses Toyota-genuine hardware (lock, hinges, glass) sourced from a 76 Series rear door, mated to the 78 body via the conversion specialist's bracketry.
2. Suppliers and Quality Tiers
The main Australian suppliers are Trakka (premium, $14,000-$18,000 fitted), MITS Alloy ($10,000-$14,000), Adventure Fitouts ($9,000-$12,000) and Outback Customs ($8,000-$11,000). All include engineering certification in the fitted price. The quality difference between tiers shows in panel-fit precision, paint matching, seal longevity and how cleanly the cut blends into the body.
3. Engineering and Compliance
The conversion is structural and requires engineering certification for legal Australian road use. Reputable suppliers include the engineering certificate in their fitted price - if a quote does not, factor an additional $800 to $1,500 for separate certification. Without certification, the vehicle is non-compliant and uninsured in an accident.
4. Why Owners Convert
The 3rd door makes daily family use of the Troopy genuinely practical. Children can climb in unassisted, groceries and gear can be loaded directly to the rear seat area, and the front passenger does not need to exit and tilt the seat at every rear-passenger entry or exit. For touring families this is the single most-requested upgrade after the pop-top conversion.
5. When the Conversion Makes Sense
The conversion makes sense when (a) the Troopy is your daily family vehicle and you use the second row frequently, (b) you have children who need easy access, or (c) you have done a pop-top conversion and the Troopy is now a full camper where second-row access matters more. It does not make sense for working Troopies, single-occupant tourers, or any build where second-row access is rare.
Frequently Asked Questions
How much does a Troopy 3rd door conversion cost?
$8,000 to $18,000 fitted depending on supplier tier and quality. Reputable suppliers include engineering certification in the fitted price.
Which suppliers do 3rd door conversions?
Trakka, MITS Alloy, Adventure Fitouts and Outback Customs are the main Australian specialists. All offer ADR-compliant certified conversions.
Does the 3rd door affect Troopy resale value?
Yes, positively, when professionally done with engineering certification. A documented 3rd door conversion adds $5,000 to $12,000 to resale value depending on quality and supplier reputation.
Is the 3rd door ADR compliant?
Yes when done by a reputable supplier with engineering certification. Without certification, the conversion is non-compliant and uninsured.
