2021 Isuzu D-MAX DL20 1.9L Diesel · YT21 FPN

The 1.9‑litre diesel engine typically delivers around 45‑50 mpg (imperial) in mixed driving, keeping fuel costs moderate for a commercial vehicle. Road tax for a 2021 diesel of this size usually falls in the £150‑£200 band, while the insurance group is commonly in the 30‑35 range. Routine maintenance, including tyre replacement and brake service, aligns with the model's average annual cost of roughly £300‑£400.

Combining fuel, tax, insurance and typical upkeep, an estimated annual running cost for this D‑MAX lies between £800 and £1,000, assuming average mileage and standard servicing intervals.

Focus on the tyres first: check tread depth, wear patterns and sidewall condition, especially on the front inner positions that previously triggered advisories. Uneven wear could point to suspension or alignment issues that may require corrective work.

Next, examine the braking system. Look for disc thickness, pad wear, and any signs of rotor warping or rust, as brake disc failures are a frequent MOT failure cause for this model. While the MOT records show no failures, a visual inspection can reveal early signs of wear.

Finally, inspect the engine bay for any warning lights or diagnostic codes, particularly the engine MIL. Even though no MIL failures have been recorded in the MOT history, the model’s aggregate data flags engine mil as a top failure reason, so a quick scan with an OBD tool can provide peace of mind.