When to replace a fleet vehicle: policy, scorecard and decision process

Replace with evidence

• Use age and distance as review triggers, not as automatic disposal rules.
• Compare the next ownership period with a realistic replacement alternative.
• Give safety and operational fit explicit veto power over a cheap-looking unit.
• Document assumptions, approval and the outcome after replacement.

1. Define review triggers

Set triggers by vehicle class and duty cycle. Reaching a trigger places the unit in review; it does not mark it for sale. Severe duty, long lead times and specialised equipment may need different thresholds.

• Age, mileage or engine hours
• Repair or downtime cost above a rolling threshold
• Repeated safety-critical defects
• Loss of payload, range or route fit
• Parts or manufacturer support no longer available

2. Compare forward-looking cost

Past spending explains history, but it cannot be recovered. Estimate the cost of keeping the unit for the next decision period and compare it with the net cost of replacing it: acquisition, financing where relevant, resale value, energy, maintenance and expected downtime.

Keep-versus-replace gap

projected cost to keep − projected net cost to replace

Worked example, invented figures: keeping a vehicle for three years costs MXN 310,000 in fuel, repairs and downtime. Replacing it costs MXN 285,000 net, after expected resale. The gap is MXN 25,000 in favour of replacement. The result depends on the assumptions, so write them down.

Use the same horizon, workload, currency and cost scope for both options. The total cost of ownership guide explains the scope, and the KPI guide shows how to measure the availability behind the case.

3. Use a transparent scorecard

Weight the factors according to the operation and publish the evidence behind each score. A weighted total helps rank candidates, but a critical safety or legal limit should override the average.

In Colombia, the technical-mechanical and emissions inspection must be done at a diagnostic centre registered in the RUNT (Resolución 20223040045295 de 2022, art. 3.3.4.1). In Brazil, check with the state transit authority which outstanding obligations can block a vehicle’s renewal, since that affects availability. Both belong in the compliance factor, not only in cost.

4. Build a multi-year plan

Rank candidates, then test the plan against capital limits, lead times and seasonality. Spread replacements when concentration would create budget or capacity risk, and keep urgent safety decisions outside the normal queue.

• Record the target quarter and the accountable owner.
• Estimate resale value with a stated source and date.
• Define the replacement class before requesting quotes.
• Keep a contingency for total losses or major failures.

5. Measure the decision afterwards

Compare actual cost, availability and energy use with the approved case after a stable operating period. Record why assumptions missed: workload, price, maintenance, delivery time or driver adoption.

Keep the disposed vehicle’s final odometer, sale value, reason and disposal channel in its history rather than deleting the record.