Audi A4 B5 vs Opel Vectra B: which is more reliable?
According to the MotorFiable Score, the Opel Vectra B (6.4/10) has fewer serious documented faults than the Audi A4 B5 (5.5/10), mainly because of the faults in the rest of the car (suspension, brakes, electronics…).
| Item | Audi A4 B5 | Opel Vectra B |
|---|---|---|
| Segment | Saloon | Saloon |
| Years | 1994–2001 | 1995–2002 |
| MotorFiable Score | 5.5 out of 10 | 6.4 out of 10 |
| Engine score | 5.9/10 | 6.2/10 |
| Most recommended engine | 1.9 TDI · Buy | 2.0 DTI and 2.2 DTI · With caution |
| Score for the rest of the car | 5.2/10 | 6.7/10 |
| Suspension | No documented faults | 8.6 out of 101 faultMedium severity |
| Brakes | 7.1 out of 101 faultCritical severity | 7.3 out of 101 faultHigh severity |
| Steering | 7.9 out of 101 faultHigh severity | 8.9 out of 100 faults |
| Gearbox and clutch | No documented faults | 7.9 out of 101 faultHigh severity |
| Electrical system | No documented faults | 8.6 out of 101 faultMedium severity |
| Bodywork and interior | No documented faults | 8.1 out of 101 faultMedium severity |
| Airbags and safety | 6.1 out of 102 faultsCritical severity | No documented faults |
Scores out of 10: the higher, the fewer serious documented faults. How we calculate them
Main faults of the Audi A4 B5
Outside the engine
- Critical severityFrequency: OccasionalAirbags and safetyDriver's airbag recall over Takata NADI inflator (1997-1999 and 2000-2001 campaigns)Yes: Audi and the EU authorities have included the A4 built between 1997 and 2001 in campaigns over the Takata NADI driver's airbag inflator, which with age may not protect as it should in a crash. The remedy is to inspect the airbag and replace the gas generator at an official service centre; the German press speaks of about an hour's work.
- Critical severityFrequency: OccasionalBrakesBrake pedal retaining bolt that can work loose (1998-1999 campaign)The British DVSA recorded in January 1999 a recall of 9,192 Audi A4s built between July 1994 and August 1995: the bolt holding the brake pedal could work loose and leave the pedal on the floor without returning, with loss of braking control. The bolt was checked and tightened.
- High severityFrequency: OccasionalSteeringPremature wear of the track rod end ball joints (1999 campaign)In 1999, 38,307 Audi A4s built between March and August 1998 were recalled in the United Kingdom: faulty seals could wear the track rod end ball joints prematurely and, if the warning noises were ignored, the pivot could come loose and affect steering control.
In their engines
- High severityFrequency: Common1.9 TDISeized or broken variable-geometry turboThe 1.9 TDI's variable-geometry turbo seizes through carbon build-up or ends up breaking after many kilometres; it appears repeatedly in all the models and outputs consulted, with cases from as early as 22,000 km.Repair (garage): €360–€900Appears at around 22,000 km
- Medium severityFrequency: Very frequent1.9 TDIEGR valve clogged with carbonThe 1.9 TDI's EGR valve fills with carbon deposits, especially on short, urban journeys, and it is the fault that appears in the statistics for every model and output consulted, from the rotary pump to the unit injector.Repair (garage): €350–€450Appears at around 50,000 km
- High severityFrequency: Occasional1.8 T 20vTurbo wear and oil consumptionThe 1.8T turbo can fail over time -cases documented on an Audi TT at 60,000 and 155,000 km- and several sources link it to growing oil consumption in the engine itself. It is not the most cited fault, but it is one of the most expensive when it appears.
Main faults of the Opel Vectra B
Outside the engine
- High severityFrequency: OccasionalBrakesHandbrake cable of insufficient diameter, at risk of premature failure (1998 recall)In February 1998 Vauxhall (Opel) recalled 195,000 Vectras in the UK because the handbrake cable was of insufficient diameter and could fail early. The register does not distinguish the generation and gives a build window of 1995 to 1998. It was replaced with a modified, larger-diameter version.
- High severityFrequency: OccasionalGearbox and clutchSecondary shaft bearings in the F15 and F17 manual gearboxes (Vectra B 1.6 and 1.8)According to Kolesa.ru, the F15 and F17 manual gearboxes of Vectra Bs with 1.6 and 1.8 engines did not cope well with engine torque and their secondary shaft bearings could fail; the damage could stay as noise or spread to the differential and the casing. The F18 and F23 are considered correct.
- Medium severityFrequency: OccasionalSuspensionWear of the ball joints and bushes on the multi-link rear axle armsAccording to the Russian magazine Kolesa.ru, the outer ball joints of the rear arms and the bushes of the original trailing arms last about 80,000-100,000 km if properly fitted, and cheap replacement parts much less. Replacing them is laborious and requires a wheel alignment of the rear wheels afterwards.Appears at around 80,000 km
In their engines
- High severityFrequency: Occasional2.0 DTI and 2.2 DTIVP44 injection pump and air mass meter failureGerman Wikipedia documents recurring failures of the Bosch VP44 injection pump and the air mass meter in the early years of this engine. An owner testimony for this engine describes the pump being replaced at 192,500 km, at a cost the owner calls «prohibitive».
- High severityFrequency: Occasional2.0 DTI and 2.2 DTISeized or leaking turbochargerGerman Wikipedia documents turbo problems in the early years of the Vectra B. Owner testimonies describe a seized turbo («grippé») in a Vectra C after many short urban journeys, and a leak at the turbo manifold in a Zafira A before 30,000 km.
- Medium severityFrequency: Common2.0 DTI and 2.2 DTIClogged or faulty EGR valveAccording to a German used-car buying guide, the EGR valve is the only notable weakness of this engine once it had matured in the Vectra C. In the Zafira A there are several owner testimonies of a faulty EGR valve, one of them before 30,000 km.