The glass and mirrors catalogue covers the parts that owners service most often on the ZR, ZS and ZT, exterior mirror assemblies and glasses, window regulators and door drop glass. Exterior door mirrors on these cars are MG-specific in their bases and mountings (different from the Rover donor on the ZR/ZS, broadly common with the Rover 75 on the ZT) but most internal components, the mirror glass itself, the heating element and the manual or electric adjustment motor, are largely common with the wider Rover Group of the period. MGOC Spares catalogues the ZS right-hand door mirror base assembly (CRJ100260PMP) for owners restoring a crash-damaged or perished mirror housing, and the convex mirror glasses for the ZR and ZS in heated right-hand (CRW100140) and unheated left-hand (CRW100130) configurations. Identifying whether the original glass is heated or unheated is essential before ordering, most ZR 120, ZR 160, ZS 120 and ZS 180 cars left the factory with heated mirrors as standard, with the lower-spec 105 and 110 trims fitted with unheated glass.
ZR and ZS Mirror and Glass Detail
The ZR and ZS mirror housings are model-specific, with the ZR using a smaller more aerodynamic shell and the ZS a slightly larger flat-faced unit that matches the saloon or hatch styling. Mirror glass replacements typically clip into the existing motor and heating element wiring without disturbing the housing, a straightforward owner-fit job that takes around 15 minutes per side. The convex profile on the right-hand side (driver's side in UK cars) is shallower than the left for better lane visibility, and the heating element terminals connect to a simple two-wire feed from the door wiring loom. Front window regulators on the ZR are catalogued as right-hand front items (CUH101900), the regulator is a plastic-bodied cable mechanism that is a recognised long-term wear point on these cars, with cable fraying and pulley wear leading to slow operation or failure of the window mechanism.
Replacement is typically straightforward once the door card is removed. Drop glass for the right-hand front door (CUB000480) is also stocked for cars where the original glass has been smashed or scored beyond polishing.
ZT and ZT-T Mirror and Glass Detail
The MG ZT inherits the larger Rover 75 mirror housing and folding electric mirror options from higher trim levels. The mirror base assembly mounting on the ZT door is BMW-influenced in its multi-bolt fixing and the wiring loom carries up to nine wires for heating, electric adjustment, electric folding and turn-signal repeater functions on Plus-pack and post-facelift cars. Mirror glass replacements on the ZT are typically larger than the ZR and ZS units and use a different clip pattern, the ZR/ZS glass kits are not interchangeable with the ZT despite outward similarity. Window regulators on the ZT and ZT-T are also model-specific and use the cable-and-pulley system common to BMW-derived chassis of the period.
Drop glass on the ZT is laminated rather than tempered on some Plus-pack cars to improve cabin acoustics, which affects the replacement specification, toughened glass is the standard fitment unless the original was specified with the laminated upgrade.
Ordering Considerations
When ordering glass or mirror parts, the principal information needed is the car (ZR, ZS, ZT, ZT-T or modern ZS SUV), the side (left-hand or right-hand front), the body style (hatch or saloon on the ZS, saloon or estate on the ZT), the year and (on the ZR/ZS) whether the original mirror is heated or unheated. Pre-facelift and post-facelift mirror housings are visually similar but use different paint codes for the colour-matched cap, so colour code is also worth confirming for cars where the mirror cap is integral to the housing rather than a separate clip-on cover. The MGOC Spares glass and mirror range covers the most commonly serviced items; full window regulator assemblies, door glass on the rear, and mirror motors are typically available through the wider Rover Group specialist network where the MGOC catalogue does not extend.