Ford B-Max
Award-winning three-cylinder turbo with wet timing belt and integrated exhaust manifold in the head. Light and efficient, but oil quality and change intervals are critical for longevity. Chain-driven from mid-2018.
Decent Van
125 hp in the B-Max: sufficient for relaxed driving. No excitement, but practical and comfortable.
Engine Weaknesses 6
The oil-bath timing belt degrades with incorrect oil type or overdue change intervals. Rubber fragments block the oil strainer and endanger the oil pump and connecting-rod bearings.
Symptoms: Unusual noises from engine bay, engine warning light, in the worst case engine seizure from oil pressure loss.
The plastic fitting on the turbo coolant hose at the expansion tank becomes brittle and fractures. Rapid coolant loss can overheat the engine in minutes and cause irreparable damage.
Symptoms: Visible coolant loss, steam rising from engine bay, temperature warning. Coolant level drops rapidly.
The integrated exhaust manifold in the cylinder head generates extreme heat. Insufficient cooling (e.g. after degas hose failure) can blow the head gasket.
Symptoms: White exhaust smoke, oil-milk in expansion tank, coolant loss without visible external leak, power loss.
The front cover seal on early 1.0 EcoBoost engines (up to approx. February 2015) was not oil-resistant. Oil attacks the seal, causing gradual coolant loss. TSI 15-1070 addresses the problem.
Symptoms: Coolant level drops without visible external leak, temperature warning, whitish steam from engine bay.
The integrated catalyst on the 1.0 EcoBoost fails relatively early. Fault code P0420 appears in the fault memory, increased emissions and potential MOT issues follow.
Symptoms: Engine warning light with code P0420, slightly increased fuel consumption, exhaust smell in cabin.
The wastegate actuator rod on the small turbocharger vibrates due to a leaking vacuum actuator. Leads to power loss and fault code P0299 (underboost).
Symptoms: Rattling noise from turbo area, noticeable power drop, fault code P0299, engine in limp mode.
Vehicle Weaknesses 6
Inspection reports show that older B-Max models are flagged for defective springs and dampers more than twice as often as the average. Steering joints also wear quickly. Typical after 80,000–120,000 km.
According to inspection data, the B-Max regularly receives advisories for worn steering joints and track rod ends. Premature wear leads to steering play.
The rubber seals on the rear sliding doors work loose or tear over time. The guide rails collect sand and leaves, causing scraping noises and sticking. Regular lubrication with silicone oil is essential.
Older B-Max examples fail inspection with a rusty exhaust system more often than average. Damage is concentrated in the middle and rear sections of the exhaust. Typical from seven years or 100,000 km.
Electric window regulators in the B-Max fail, particularly the rear ones. The plastic guide rails for the glass break or the motors give up. The problem is widespread from 60,000–100,000 km and primarily affects the rear doors without a B-pillar.
The stop-start system frequently fails due to a weakening starter battery, especially in short-trip drivers. The fault occurs sporadically and highlights the limits of the AGM battery.