Toyota Highlander (XU70) — The Complete Tuning Guide 2026

The Toyota Highlander XU70 arrived globally in 2020 riding the TNGA-K platform — the same bones that underpin the RAV4, Camry, and Sienna. Two drivetrains define the lineup: a 2.5-litre four-cylinder hybrid good for 243 hp combined, and a naturally aspirated 3.5-litre V6 pushing 295 hp through an 8-speed automatic. Kerb weight sits between 2 050 and 2 250 kg depending on variant and market. It is sold in North America, the Gulf states, Russia, and Japan under slightly different trim names, making it one of the most globally spread TNGA-K SUVs on the road.

Because the platform is shared with so many vehicles, the aftermarket infrastructure is unusually rich for a three-row family SUV. TRD built a full factory-backed accessory line. Wald International, Modellista, and Prior Design each offer broad body programmes. Wheel fitment is dead-simple: the hub is 5×114.3, a bolt pattern shared by half of Japan's output, so tyre and wheel choice is effectively unlimited.

This guide covers every major tuning avenue — body kits, wheels, performance, interior — with honest cost data for European and UK buyers.

Specifications at a Glance

Body Kits — Overview

The XU70's profile is restrained to the point of anonymity. A mild rake, flush surfacing, and conservative headlamp clusters leave a great deal of visual real estate for tuners to work with. Three programmes dominate the market at different price points and aesthetic philosophies.

TRD Accessories (Factory Performance Line)

Toyota Racing Development offers an OEM-plus approach: everything bolts on without drilling, matches factory paint codes, and carries a warranty-compatible designation in North American and Japanese markets. The XU70 kit centres on a front bumper insert with mesh grilles, matte-black side skirts, a subtle lip spoiler for the tailgate, and a TRD-badged rear diffuser. Add the sport exhaust tip and you have a complete visual programme that adds aggression without alienating HOA parking committees.

The TRD approach suits buyers who want showroom confidence: dealers can install the full kit in a single morning, and the fitment tolerances are Toyota-spec. The trade-off is that the styling is incremental. On an XU70 that already looks cohesive, the kit reads as a factory upgrade rather than a transformation.

Estimated kit cost (parts only, US market): $1 800–$2 800. EU import duty adds 6.5 % on auto parts. Installation: 4–6 hours at a dealer or body shop.

Wald International Black Bison Edition

Wald International has been producing wide-body grand touring kits for Japanese luxury SUVs since the 1990s, and their XU70 Black Bison programme is one of their more restrained recent efforts — restrained meaning it adds about 40 mm of width per side and replaces every exterior panel below the beltline. The full kit includes a reshaped front bumper with quad lower vents, extended front wings, sculpted door-mounted side skirts that kick out noticeably at the rear arches, a diffuser with integrated quad-tip exhaust surrounds, a small roofline spoiler, and Wald's trademark multi-LED daytime running light inserts.

The result is a vehicle that reads substantially wider than stock — which is exactly the point when you are fitting 22-inch wheels. Wald ships worldwide from Osaka; most European distributors hold the XU70 kit in stock. Fitment requires professional body prep, minor bumper support trimming, and careful panel gap adjustment. Expect a full day at a specialist.

Estimated kit cost (FRP, unpainted, Japan FOB): €4 200–€5 800. Shipping to UK/EU: €350–€600. Paint and install: £2 000–£3 500 depending on finish.

Modellista Elegante Grandeur

Modellista is Toyota's own in-house styling subsidiary, positioned between TRD's functional ethos and full aftermarket excess. The XU70 programme — branded Elegante Grandeur in Japan — applies a lower lip, flush side skirt mouldings, a rear spoiler, and chrome-accent door mirror covers. It reads as a factory option in the best possible way. Modellista kits are distributed through Toyota dealers in Japan and can be ordered for export via official channels or specialist importers.

The styling is deliberately understated. If you want your Highlander to look like the top-spec Tokyo Motor Show display car rather than a US police-spec SUV, Modellista is the answer. Fitment is plug-and-play; clip-and-adhesive mounting means no permanent modification to the body.

Estimated kit cost (Japan dealer, full set): ¥280 000–¥380 000 (~€1 700–€2 300). Import logistics to EU/UK: €400–€700. Install: 3–5 hours.

Prior Design PD-XU70 Programme

Prior Design (Germany) targets European buyers who want North American proportions without Japanese import complexity. Their XU70 kit is polyurethane, meaning it is impact-resistant at low temperatures — a real advantage in northern European winters where FRP becomes brittle below -10 °C. The programme covers front splitter, side skirt extensions, rear diffuser, and an optional roof spoiler. It does not widen the arches, which keeps the installation reversible and the insurance paperwork straightforward in Germany and the UK.

Wheels — Fitment Guide

The XU70 runs 5×114.3 with a 60.1 mm centre bore and approximately +35 factory offset on 18-inch OEM alloys. The wheelarch clearance is generous enough for 20-inch and even 22-inch fitments without arch modification, provided offset and width are dialled in correctly.

Recommended brands: Work Emotion ZR10, Rays Volk TE37X (20"), BBS CI-R (for understated Euro look), Forgiato Quattro (show / Gulf market), HRE FlowForm FF15T. For budget-conscious builds, OZ Ultraleggera HLT in 20×9J ET35 is a proven fit with no rubbing on stock suspension.

Lowering note: The XU70 hybrid runs an independent rear suspension layout with the electric rear drive unit mounted low. Coilover clearance requires confirmation with the specific kit manufacturer. Eibach Pro-Kit springs (−25 mm front / −20 mm rear) are the most commonly fitted passive solution and maintain full suspension travel for the AWD-i system.

Performance Upgrades

Powertrain tuning on the XU70 splits sharply between the two engine options.

3.5 V6: The 2GR-FKS engine responds modestly to intake and exhaust work — a cold-air intake and cat-back system typically nets 12–18 hp on the dyno. ECU remapping is available from Ecutek and Alientech-compatible tuners; gains of 20–28 hp on 95-octane fuel are documented. A heat-exchanger-based intercooler or supercharger kit (Magnuson TVS1900 for the RX 350 shares the same block) is the most dramatic upgrade, pushing output to 380–420 hp. This is a significant investment — supercharger kit plus installation lands at $8 000–$12 000 — and will require upgraded driveshafts and a transmission cooler to survive long-term.

2.5 Hybrid: The hybrid system is not map-tunable in any meaningful way with current aftermarket solutions. The PCU (power control unit) is heavily encrypted, and Toyota's safety interlocks prevent torque increases beyond the thermal envelope of the battery pack. The practical performance upgrade path is: upgraded brake pads (Endless MX72 or Brembo HP2000 for track use), Eibach springs for sharper body control, and 20-inch lightweight alloys to reduce unsprung mass.

Exhaust: Both engine variants benefit from a cat-back system for sound quality. The V6 becomes genuinely vocal with a 2.5-inch dual exit. The hybrid's exhaust note is irrelevant below 60 km/h (the ICE is often off), but a resonator delete at motorway speeds produces a more purposeful tone.

Interior Upgrades

The XU70's cabin is competent but corporate. Three upgrade tiers define the aftermarket:

Tier 1 — OEM+: TRD and Modellista both offer interior accessory packs including sports pedals, carbon-look trim inserts, illuminated sill plates, and leather-wrapped shift knobs. These install in an afternoon and read as factory-optional equipment.

Tier 2 — Reupholstery: Full Nappa leather reupholstery with contrast stitching runs £1 800–£3 200 in the UK depending on row count and material grade. Alcantara headliner and A-pillar wrap adds £600–£1 000. Japanese Recaro seats (SR-F or SX) fit with bracket adapters; cost including brackets: €900–€1 400 per seat.

Tier 3 — Tech: Android Auto / CarPlay retrofits for non-equipped variants, 360° camera system upgrades (the OEM version is low-resolution), and aftermarket head unit replacement (Kenwood DMX9720XDS or Alpine iLX-F511 are popular). A complete tech refresh including wiring integration runs £1 200–£2 000 at a specialist.

What Does It Cost? — Realistic Budget Guide

The following breakdown assumes a UK/EU buyer purchasing a complete visual transformation: mid-tier body kit, 20-inch wheels, and professional installation.

A TRD-only build (dealer-installed accessories, OEM 20-inch wheels) lands at £3 500–£5 000 all-in and avoids import complexity entirely. The Modellista route sits in the middle: approximately £4 500–£6 500 for a complete exterior and interior accessory package, sourced via a UK Toyota specialist importer.

Frequently Asked Questions

Q: Will a Wald Black Bison kit void my Toyota warranty?

In the UK and most EU markets, manufacturer warranties follow the Magnusson-Moss equivalent (Block Exemption Regulation): Toyota must demonstrate that the aftermarket part caused a specific failure in order to deny warranty cover. A cosmetic body kit attached without structural modification does not void powertrain or electronics cover. Always confirm with your dealer before fitting.

Q: Can I fit 22-inch wheels without lowering the Highlander?

Yes. At stock ride height, 22×9.5J ET30 with a 265/40 R22 tyre fits the XU70 wheelarch with approximately 8 mm of inner clearance at full lock. Most fitters recommend a test fit before committing to a second set of tyres. A 10 mm spacer on all four corners moves the wheel flush to the arch lip for a cleaner stance without altering suspension geometry significantly.

Q: Is ECU remapping safe on the 3.5 V6 hybrid — oh wait, is that even available?

The 3.5 V6 XU70 is not a hybrid. Only the 2.5-litre four-cylinder version uses Toyota's multi-motor hybrid system. The 3.5 V6 is a conventional petrol AWD with an 8-speed automatic, and it is fully compatible with Ecutek, COBB-adjacent platforms, and custom OBD-based tuning. Remaps are performed by authorised Ecutek dealers in the UK, Germany, and the UAE.

Q: What is the best first modification for a stock XU70?

For most owners the highest visual-to-cost ratio is a set of 20-inch aftermarket wheels combined with a TRD or Modellista front lip. Together these two items — achievable for under £2 500 — transform the vehicle's stance and kerb presence more dramatically than any single body kit. Add a Eibach spring kit (£380–£480 fitted) to lower the centre of gravity 20–25 mm and the transformation is complete without any structural modification or paint work.