Mazda 5
1.8-litre MZR four-cylinder from the L-series. Entry-level engine for mid-range and van applications, adequate for everyday use.
Solid Family Transporter
Adequately powered for family life. More nimble than the competition, but ultimately a practical people-mover.
Engine Weaknesses 5
The L8 MZR is an interference engine. If the timing belt snaps, pistons hit valves — expensive engine damage. Mazda service interval approx. 120,000 km, better every 80,000–100,000 km.
Symptoms: Engine will not start after belt failure, no compression, metallic noises on starting attempt
At high mileages (from around 150,000 km) the valve stem seals leak. Oil enters the combustion chambers, leading to elevated oil consumption and blue smoke.
Symptoms: Blue smoke on cold start or after extended standing, dropping oil level with no external leaks
Carbon deposits on the throttle body cause a sticking mechanism and jerky pull-away. After cleaning, the throttle body must be re-adapted in the ECU.
Symptoms: Sticking throttle, jerky pull-away, rough idle, occasional stalling
The lambda sensor of the L8 ages from around 100,000 km and responds increasingly slowly. Typical: fault code P0131 or P2251 (bank 1), increased fuel consumption and check engine light.
Symptoms: Check engine light on; slightly elevated fuel consumption; fault code lambda sensor bank 1.
The camshaft sensor of the L8 can become coated with a whitish-grey deposit or develop contact faults causing malfunctions. Typical symptoms are intermittent starting problems and stumbling at high revs.
Symptoms: Engine stumbles or hesitates at high revs; intermittent starting problems; check engine light with camshaft fault code.
Vehicle Weaknesses 9
Mazda recalled over 211,000 vehicles in Germany because the end caps of the tailgate gas struts can crack due to corrosion, causing the tailgate to fall shut uncontrolled.
As with the predecessor CR, the central locking actuator motors in the sliding doors fail. Left and right motors are not interchangeable. Aftermarket replacements are available at low cost.
The AC compressor or its magnetic clutch fails, and the air conditioning stops cooling. More common on vehicles with neglected refrigerant levels or condenser damage.
Particles in the hydraulic system damage the power steering pump. Power assistance fails, making the vehicle very heavy to steer. Affects petrol models.
The rear brake calipers seize, causing the brake pads to drag permanently against the disc. The cause is corrosion on the piston guides, especially after periods of inactivity. The brake discs become warped in the process and must be replaced.
Standard batteries discharge early and cause starting problems, especially in winter. Frequent short-trip use accelerates battery wear.
Rear wheel bearings wear prematurely and produce typical driving noise. Quality replacements are available cheaply; the replacement process is straightforward compared to other vehicles.
The CW is also prone to rust: underside, screws and sliding door brackets corrode within a few years. Additional underbody rust protection is recommended.
Seat upholstery, especially the driver's seat, shows significant wear and sagging on vehicles from around 100,000 km. The family van with sliding doors invites intensive use, which puts heavy demands on the cushioning.