2006 Volkswagen Transporter 2.5L Diesel · GL06 OSJ

A pattern of rear brake pipe corrosion and recurring stop lamp failures defines the mechanical profile of this 2006 Volkswagen Transporter, and it warrants close attention from any prospective buyer. The most recent test on 5 August 2026 returned a fail initially due to inoperative stop lamps, with both rear brake pipes flagged as corroded and an oil leak noted but masked by the undertray; the vehicle subsequently passed the same day once the lamps were rectified, but the brake pipe advisories carried over. This is the second stop lamp failure in three years, with an identical defect recorded on 3 August 2023, suggesting a chronic electrical issue likely centred on the rear lamp cluster, wiring, or switch rather than a one-off bulb failure. The brake pipe advisories are a more pressing structural concern, as corrosion on rear brake lines covered in grease is a common precursor to perforation and represents a serious safety risk if left unaddressed. The recorded mileage of 194,041 miles across twenty years equates to roughly 9,700 miles annually, which sits broadly in line with the average accumulation for a working light commercial vehicle of this age. Testing history is continuous on an annual basis with no gaps in MOT records from 2021 through 2026, indicating consistent road use rather than long periods of standing. The mileage progression between tests appears steady and proportionate, supporting the assumption of regular operational use rather than extended lay-up, which means the typical wear components such as suspension bushes, shock absorbers, ball joints, and engine mountings will have accumulated their expected fatigue. Given the van's age and mileage, it is reasonable to expect that some non-testable components will be approaching the limits of their service life. The corrosion flagged on both rear brake pipes is the single most important area for inspection. On a test drive, listen for any spongy or inconsistent pedal feel, and request that the rear brake lines be physically inspected and ideally photographed for evidence of surface rust, pitting, or flaking. Even though both lines were merely advisory at the recent test, brake pipe corrosion is progressive and can deteriorate rapidly between MOTs, particularly on a vehicle of this age exposed to winter road salt. A pre-purchase inspection should establish whether replacement has been carried out or whether the lines are merely masked by grease; if unaddressed, this will become a fail at the next test and poses a significant safety hazard in the interim. The oil leak noted on the recent test is described as not excessive, but the source is obscured by the undertray, meaning the actual origin has not been visually confirmed. This could be anything from a minor sump gasket seep to a rear main seal or timing chain area leak, and a buyer should arrange for the undertray to be removed during a pre-purchase inspection to pinpoint the source and assess the severity. The front brake pads and discs flagged as wearing in 2022 should also be checked, as these components will have covered a further 20,000 miles or so since that advisory, and replacement is likely overdue. The stop lamp failure history warrants verification that the underlying fault has been correctly diagnosed and repaired rather than simply resetting a bulb; ask for receipts or evidence of work carried out to the rear lamp circuit. Finally, listen on the test drive for any clonks from the front suspension over bumps, excessive wandering in crosswinds, or uneven braking pulling to one side, all of which would indicate wear beyond what the MOT record alone can reveal.