Quinton Hazell Timing Belt Kit • QBK403

Quinton Hazell QBK403 Timing Belt Kit

Complete replacement Quinton Hazell timing belt kit for Mazda MX-5 MK1/NA and MK2/NB/NB-FL 1.6 and naturally aspirated 1.8 petrol models listed in the compatibility table.

The timing belt keeps the crankshaft and camshafts synchronised so the engine's valves operate at the correct point in the combustion cycle. QBK403 is designed as an aftermarket replacement for the original timing components on the applications listed.

This kit provides the three principal timing-belt service components together: the timing belt, tensioner pulley and idler / guide pulley. Replacing the belt and pulleys together helps avoid reusing worn bearings during a timing-belt service.

Typical replacement reasons include scheduled timing-belt maintenance, belt age or cracking, noisy or rough pulley bearings, excessive pulley play or replacement while carrying out other work in the engine timing area.

• Part type: Complete timing belt / cambelt kit
• Timing belt: Quinton Hazell QTB338
• Timing belt tensioner pulley: Quinton Hazell QTT332
• Timing belt idler / guide pulley: Quinton Hazell QTT333
• Timing belt teeth: 145
• Timing belt width: 22 mm
• Number of pulleys included: 2
• Quantity per vehicle: 1 kit
• Quantity supplied: 1 complete timing belt kit
• Brand: Quinton Hazell
• Part No.: QBK403
• Designed as an aftermarket replacement for the original timing components on the applications listed

Fitment advice: QBK403 is directly catalogued for the Mazda MX-5 NA and NB/NB-FL applications shown in the compatibility table. The confirmed QBK403 application data found covers naturally aspirated engines up to 146 PS; the 1.8i Turbo has therefore not been included. For imported, modified or previously repaired cars, matching the part number or component style on the parts being replaced is recommended.

Other items to consider: Water pump, thermostat, camshaft oil seals, crankshaft oil seal, auxiliary belts and fresh coolant.

Useful tools / consumables: Suitable socket set, torque wrench, crankshaft holding equipment where required and appropriate engine timing tools.

Difficulty guide: DIY Difficulty: Advanced. Correct engine timing, belt routing and tensioning procedures are essential during installation.

Why Quinton Hazell? Quinton Hazell is a long-established automotive aftermarket brand, offering dependable replacement parts for servicing and repair. Its components are designed as practical aftermarket replacements for the original parts on the applications listed.

What’s in the box: 1 × QTB338 timing belt, 1 × QTT332 timing belt tensioner pulley and 1 × QTT333 timing belt idler / guide pulley.

Installation notes: Establish the correct engine timing before removing the original belt. Inspect the water pump and oil seals while access is available. Fit the new belt and pulleys using the correct tightening and tensioning procedure, then rotate the engine manually and re-check timing before starting.